2143 lines
101 KiB
Python
2143 lines
101 KiB
Python
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from django.core import formfields, validators
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from django.core import db
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from django.core.exceptions import ObjectDoesNotExist
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from django.conf import settings
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import copy, datetime, os, re, sys, types
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# The values to use for "blank" in SelectFields. Will be appended to the start of most "choices" lists.
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BLANK_CHOICE_DASH = [("", "---------")]
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BLANK_CHOICE_NONE = [("", "None")]
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# Admin stages.
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ADD, CHANGE, BOTH = 1, 2, 3
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# Values for Relation.edit_inline_type.
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TABULAR, STACKED = 1, 2
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# Values for filter_interface.
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HORIZONTAL, VERTICAL = 1, 2
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# Random entropy string used by "default" param.
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NOT_PROVIDED = 'oijpwojefiojpanv'
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# Size of each "chunk" for get_iterator calls.
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# Larger values are slightly faster at the expense of more storage space.
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GET_ITERATOR_CHUNK_SIZE = 100
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# Prefix (in python path style) to location of models.
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MODEL_PREFIX = 'django.models'
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# Methods on models with the following prefix will be removed and
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# converted to module-level functions.
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MODEL_FUNCTIONS_PREFIX = '_module_'
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# Methods on models with the following prefix will be removed and
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# converted to manipulator methods.
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MANIPULATOR_FUNCTIONS_PREFIX = '_manipulator_'
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LOOKUP_SEPARATOR = '__'
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RECURSIVE_RELATIONSHIP_CONSTANT = 'self'
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####################
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# HELPER FUNCTIONS #
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####################
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# capitalizes first letter of string
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capfirst = lambda x: x and x[0].upper() + x[1:]
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# prepares a value for use in a LIKE query
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prep_for_like_query = lambda x: str(x).replace("%", "\%").replace("_", "\_")
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# returns the <ul> class for a given radio_admin value
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get_ul_class = lambda x: 'radiolist%s' % ((x == HORIZONTAL) and ' inline' or '')
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def curry(*args, **kwargs):
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def _curried(*moreargs, **morekwargs):
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return args[0](*(args[1:]+moreargs), **dict(kwargs.items() + morekwargs.items()))
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return _curried
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def get_module(app_label, module_name):
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return __import__('%s.%s.%s' % (MODEL_PREFIX, app_label, module_name), '', '', [''])
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def get_app(app_label):
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return __import__('%s.%s' % (MODEL_PREFIX, app_label), '', '', [''])
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_installed_models_cache = None
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def get_installed_models():
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"""
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Returns a list of installed "models" packages, such as foo.models,
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ellington.news.models, etc. This does NOT include django.models.
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"""
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global _installed_models_cache
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if _installed_models_cache is not None:
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return _installed_models_cache
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_installed_models_cache = []
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for a in settings.INSTALLED_APPS:
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try:
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_installed_models_cache.append(__import__(a + '.models', '', '', ['']))
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except ImportError:
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pass
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return _installed_models_cache
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_installed_modules_cache = None
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def get_installed_model_modules(core_models=None):
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"""
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Returns a list of installed models, such as django.models.core,
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ellington.news.models.news, foo.models.bar, etc.
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"""
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global _installed_modules_cache
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if _installed_modules_cache is not None:
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return _installed_modules_cache
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_installed_modules_cache = []
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# django.models is a special case.
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for submodule in (core_models or []):
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_installed_modules_cache.append(__import__('django.models.%s' % submodule, '', '', ['']))
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for m in get_installed_models():
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for submodule in getattr(m, '__all__', []):
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_installed_modules_cache.append(__import__('django.models.%s' % submodule, '', '', ['']))
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return _installed_modules_cache
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class LazyDate:
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"""
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Use in limit_choices_to to compare the field to dates calculated at run time
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instead of when the model is loaded. For example::
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... limit_choices_to = {'date__gt' : meta.LazyDate(days=-3)} ...
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which will limit the choices to dates greater than three days ago.
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"""
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def __init__(self, **kwargs):
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self.delta = datetime.timedelta(**kwargs)
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def __str__(self):
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return str(self.__get_value__())
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def __repr__(self):
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return "<LazyDate: %s>" % self.delta
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def __get_value__(self):
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return datetime.datetime.now() + self.delta
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################
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# MAIN CLASSES #
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################
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class FieldDoesNotExist(Exception):
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pass
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class BadKeywordArguments(Exception):
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pass
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class Options:
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def __init__(self, module_name='', verbose_name='', verbose_name_plural='', db_table='',
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fields=None, ordering=None, unique_together=None, admin=None, has_related_links=False,
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where_constraints=None, object_name=None, app_label=None,
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exceptions=None, permissions=None, get_latest_by=None,
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order_with_respect_to=None, module_constants=None):
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# Save the original function args, for use by copy(). Note that we're
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# NOT using copy.deepcopy(), because that would create a new copy of
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# everything in memory, and it's better to conserve memory. Of course,
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# this comes with the important gotcha that changing any attribute of
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# this object will change its value in self._orig_init_args, so we
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# need to be careful not to do that. In practice, we can pull this off
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# because Options are generally read-only objects, and __init__() is
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# the only place where its attributes are manipulated.
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# locals() is used purely for convenience, so we don't have to do
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# something verbose like this:
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# self._orig_init_args = {
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# 'module_name': module_name,
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# 'verbose_name': verbose_name,
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# ...
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# }
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self._orig_init_args = locals()
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del self._orig_init_args['self'] # because we don't care about it.
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# Move many-to-many related fields from self.fields into self.many_to_many.
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self.fields, self.many_to_many = [], []
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for field in (fields or []):
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if field.rel and isinstance(field.rel, ManyToMany):
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self.many_to_many.append(field)
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else:
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self.fields.append(field)
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self.module_name, self.verbose_name = module_name, verbose_name
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self.verbose_name_plural = verbose_name_plural or verbose_name + 's'
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self.db_table, self.has_related_links = db_table, has_related_links
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self.ordering = ordering or []
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self.unique_together = unique_together or []
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self.where_constraints = where_constraints or []
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self.exceptions = exceptions or []
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self.permissions = permissions or []
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self.object_name, self.app_label = object_name, app_label
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self.get_latest_by = get_latest_by
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if order_with_respect_to:
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self.order_with_respect_to = self.get_field(order_with_respect_to)
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self.ordering = (('_order', 'ASC'),)
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else:
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self.order_with_respect_to = None
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self.module_constants = module_constants or {}
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# Alter the admin attribute so that the 'fields' members are lists of
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# field objects -- not lists of field names.
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if admin:
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# Be sure to use admin.copy(), because otherwise we'll be editing a
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# reference of admin, which will in turn affect the copy in
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# self._orig_init_args.
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self.admin = admin.copy()
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for fieldset in self.admin.fields:
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admin_fields = []
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for field_name_or_list in fieldset[1]['fields']:
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if isinstance(field_name_or_list, basestring):
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admin_fields.append([self.get_field(field_name_or_list)])
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else:
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admin_fields.append([self.get_field(field_name) for field_name in field_name_or_list])
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fieldset[1]['fields'] = admin_fields
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else:
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self.admin = None
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# Calculate one_to_one_field.
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self.one_to_one_field = None
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for f in self.fields:
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if isinstance(f.rel, OneToOne):
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self.one_to_one_field = f
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break
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# Cache the primary-key field.
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self.pk = None
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for f in self.fields:
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if f.primary_key:
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self.pk = f
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break
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# If a primary_key field hasn't been specified, add an
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# auto-incrementing primary-key ID field automatically.
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if self.pk is None:
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self.fields.insert(0, AutoField('id', 'ID', primary_key=True))
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self.pk = self.fields[0]
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def __repr__(self):
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return '<Options for %s>' % self.module_name
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def copy(self, **kwargs):
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args = self._orig_init_args.copy()
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args.update(kwargs)
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return self.__class__(**args)
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def get_model_module(self):
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return get_module(self.app_label, self.module_name)
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def get_content_type_id(self):
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"Returns the content-type ID for this object type."
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if not hasattr(self, '_content_type_id'):
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mod = get_module('core', 'contenttypes')
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self._content_type_id = mod.get_object(python_module_name__exact=self.module_name, package__label__exact=self.app_label).id
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return self._content_type_id
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def get_field(self, name, many_to_many=True):
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"""
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Returns the requested field by name. Raises FieldDoesNotExist on error.
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"""
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to_search = many_to_many and (self.fields + self.many_to_many) or self.fields
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for f in to_search:
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if f.name == name:
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return f
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raise FieldDoesNotExist, "name=%s" % name
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def get_order_sql(self, table_prefix=''):
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"Returns the full 'ORDER BY' clause for this object, according to self.ordering."
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if not self.ordering: return ''
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pre = table_prefix and (table_prefix + '.') or ''
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return 'ORDER BY ' + ','.join(['%s%s %s' % (pre, f, order) for f, order in self.ordering])
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def get_add_permission(self):
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return 'add_%s' % self.object_name.lower()
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def get_change_permission(self):
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return 'change_%s' % self.object_name.lower()
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def get_delete_permission(self):
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return 'delete_%s' % self.object_name.lower()
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def get_rel_object_method_name(self, rel_opts, rel_field):
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# This method encapsulates the logic that decides what name to give a
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# method that retrieves related many-to-one objects. Usually it just
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# uses the lower-cased object_name, but if the related object is in
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# another app, its app_label is appended.
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#
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# Examples:
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#
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# # Normal case -- a related object in the same app.
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# # This method returns "choice".
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# Poll.get_choice_list()
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#
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# # A related object in a different app.
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# # This method returns "lcom_bestofaward".
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# Place.get_lcom_bestofaward_list() # "lcom_bestofaward"
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rel_obj_name = rel_field.rel.related_name or rel_opts.object_name.lower()
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if self.app_label != rel_opts.app_label:
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rel_obj_name = '%s_%s' % (rel_opts.app_label, rel_obj_name)
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return rel_obj_name
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def get_all_related_objects(self):
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try: # Try the cache first.
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return self._all_related_objects
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except AttributeError:
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module_list = get_installed_model_modules()
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rel_objs = []
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for mod in module_list:
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for klass in mod._MODELS:
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for f in klass._meta.fields:
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if f.rel and self == f.rel.to:
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rel_objs.append((klass._meta, f))
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if self.has_related_links:
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# Manually add RelatedLink objects, which are a special case.
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core = get_module('relatedlinks', 'relatedlinks')
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# Note that the copy() is very important -- otherwise any
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# subsequently loaded object with related links will override this
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# relationship we're adding.
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link_field = copy.copy(core.RelatedLink._meta.get_field('object_id'))
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link_field.rel = ManyToOne(self.get_model_module().Klass, 'related_links', 'id',
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num_in_admin=3, min_num_in_admin=3, edit_inline=True, edit_inline_type=TABULAR,
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lookup_overrides={
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'content_type__package__label__exact': self.app_label,
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'content_type__python_module_name__exact': self.module_name
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})
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rel_objs.append((core.RelatedLink._meta, link_field))
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self._all_related_objects = rel_objs
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return rel_objs
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def get_inline_related_objects(self):
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return [(a, b) for a, b in self.get_all_related_objects() if b.rel.edit_inline]
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def get_all_related_many_to_many_objects(self):
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module_list = get_installed_model_modules()
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rel_objs = []
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for mod in module_list:
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for klass in mod._MODELS:
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try:
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for f in klass._meta.many_to_many:
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if f.rel and self == f.rel.to:
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rel_objs.append((klass._meta, f))
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raise StopIteration
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except StopIteration:
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continue
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return rel_objs
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def get_ordered_objects(self):
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"Returns a list of Options objects that are ordered with respect to this object."
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if not hasattr(self, '_ordered_objects'):
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objects = []
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for klass in get_app(self.app_label)._MODELS:
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opts = klass._meta
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if opts.order_with_respect_to and opts.order_with_respect_to.rel \
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and self == opts.order_with_respect_to.rel.to:
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objects.append(opts)
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self._ordered_objects = objects
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return self._ordered_objects
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def has_field_type(self, field_type):
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"""
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||
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Returns True if this object's admin form has at least one of the given
|
||
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field_type (e.g. FileField).
|
||
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"""
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||
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if not hasattr(self, '_field_types'):
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self._field_types = {}
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||
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if not self._field_types.has_key(field_type):
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try:
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|
|
# First check self.fields.
|
||
|
|
for f in self.fields:
|
||
|
|
if isinstance(f, field_type):
|
||
|
|
raise StopIteration
|
||
|
|
# Failing that, check related fields.
|
||
|
|
for rel_obj, rel_field in self.get_inline_related_objects():
|
||
|
|
for f in rel_obj.fields:
|
||
|
|
if isinstance(f, field_type):
|
||
|
|
raise StopIteration
|
||
|
|
except StopIteration:
|
||
|
|
self._field_types[field_type] = True
|
||
|
|
else:
|
||
|
|
self._field_types[field_type] = False
|
||
|
|
return self._field_types[field_type]
|
||
|
|
|
||
|
|
def _reassign_globals(function_dict, extra_globals, namespace):
|
||
|
|
new_functions = {}
|
||
|
|
for k, v in function_dict.items():
|
||
|
|
# Get the code object.
|
||
|
|
code = v.func_code
|
||
|
|
# Recreate the function, but give it access to extra_globals and the
|
||
|
|
# given namespace's globals, too.
|
||
|
|
new_globals = {'__builtins__': __builtins__, 'db': db.db, 'datetime': datetime}
|
||
|
|
new_globals.update(extra_globals.__dict__)
|
||
|
|
func = types.FunctionType(code, globals=new_globals, name=k, argdefs=v.func_defaults)
|
||
|
|
func.__dict__.update(v.__dict__)
|
||
|
|
setattr(namespace, k, func)
|
||
|
|
# For all of the custom functions that have been added so far, give
|
||
|
|
# them access to the new function we've just created.
|
||
|
|
for new_k, new_v in new_functions.items():
|
||
|
|
new_v.func_globals[k] = func
|
||
|
|
new_functions[k] = func
|
||
|
|
|
||
|
|
class ModelBase(type):
|
||
|
|
"Metaclass for all models"
|
||
|
|
def __new__(cls, name, bases, attrs):
|
||
|
|
# If this isn't a subclass of Model, don't do anything special.
|
||
|
|
if not bases:
|
||
|
|
return type.__new__(cls, name, bases, attrs)
|
||
|
|
|
||
|
|
# If this model is a subclass of another Model, create an Options
|
||
|
|
# object by first copying the base class's _meta and then updating it
|
||
|
|
# with the overrides from this class.
|
||
|
|
replaces_module = None
|
||
|
|
if bases[0] != Model:
|
||
|
|
if not attrs.has_key('fields'):
|
||
|
|
attrs['fields'] = list(bases[0]._meta._orig_init_args['fields'][:])
|
||
|
|
if attrs.has_key('ignore_fields'):
|
||
|
|
ignore_fields = attrs.pop('ignore_fields')
|
||
|
|
new_fields = []
|
||
|
|
for i, f in enumerate(attrs['fields']):
|
||
|
|
if f.name not in ignore_fields:
|
||
|
|
new_fields.append(f)
|
||
|
|
attrs['fields'] = new_fields
|
||
|
|
if attrs.has_key('add_fields'):
|
||
|
|
attrs['fields'].extend(attrs.pop('add_fields'))
|
||
|
|
if attrs.has_key('replaces_module'):
|
||
|
|
# Set the replaces_module variable for now. We can't actually
|
||
|
|
# do anything with it yet, because the module hasn't yet been
|
||
|
|
# created.
|
||
|
|
replaces_module = attrs.pop('replaces_module').split('.')
|
||
|
|
# Pass any Options overrides to the base's Options instance, and
|
||
|
|
# simultaneously remove them from attrs. When this is done, attrs
|
||
|
|
# will be a dictionary of custom methods, plus __module__.
|
||
|
|
meta_overrides = {}
|
||
|
|
for k, v in attrs.items():
|
||
|
|
if not callable(v) and k != '__module__':
|
||
|
|
meta_overrides[k] = attrs.pop(k)
|
||
|
|
opts = bases[0]._meta.copy(**meta_overrides)
|
||
|
|
opts.object_name = name
|
||
|
|
del meta_overrides
|
||
|
|
else:
|
||
|
|
opts = Options(
|
||
|
|
# If the module_name wasn't given, use the class name
|
||
|
|
# in lowercase, plus a trailing "s" -- a poor-man's
|
||
|
|
# pluralization.
|
||
|
|
module_name = attrs.pop('module_name', name.lower() + 's'),
|
||
|
|
# If the verbose_name wasn't given, use the class name,
|
||
|
|
# converted from InitialCaps to "lowercase with spaces".
|
||
|
|
verbose_name = attrs.pop('verbose_name',
|
||
|
|
re.sub('([A-Z])', ' \\1', name).lower().strip()),
|
||
|
|
verbose_name_plural = attrs.pop('verbose_name_plural', ''),
|
||
|
|
db_table = attrs.pop('db_table', ''),
|
||
|
|
fields = attrs.pop('fields'),
|
||
|
|
ordering = attrs.pop('ordering', None),
|
||
|
|
unique_together = attrs.pop('unique_together', None),
|
||
|
|
admin = attrs.pop('admin', None),
|
||
|
|
has_related_links = attrs.pop('has_related_links', False),
|
||
|
|
where_constraints = attrs.pop('where_constraints', None),
|
||
|
|
object_name = name,
|
||
|
|
app_label = attrs.pop('app_label', None),
|
||
|
|
exceptions = attrs.pop('exceptions', None),
|
||
|
|
permissions = attrs.pop('permissions', None),
|
||
|
|
get_latest_by = attrs.pop('get_latest_by', None),
|
||
|
|
order_with_respect_to = attrs.pop('order_with_respect_to', None),
|
||
|
|
module_constants = attrs.pop('module_constants', None),
|
||
|
|
)
|
||
|
|
|
||
|
|
# Dynamically create the module that will contain this class and its
|
||
|
|
# associated helper functions.
|
||
|
|
if replaces_module is not None:
|
||
|
|
new_mod = get_module(*replaces_module)
|
||
|
|
else:
|
||
|
|
new_mod = types.ModuleType(opts.module_name)
|
||
|
|
|
||
|
|
# Collect any/all custom class methods and module functions, and move
|
||
|
|
# them to a temporary holding variable. We'll deal with them later.
|
||
|
|
if replaces_module is not None:
|
||
|
|
# Initialize these values to the base class' custom_methods and
|
||
|
|
# custom_functions.
|
||
|
|
custom_methods = dict([(k, v) for k, v in new_mod.Klass.__dict__.items() if hasattr(v, 'custom')])
|
||
|
|
custom_functions = dict([(k, v) for k, v in new_mod.__dict__.items() if hasattr(v, 'custom')])
|
||
|
|
else:
|
||
|
|
custom_methods, custom_functions = {}, {}
|
||
|
|
manipulator_methods = {}
|
||
|
|
for k, v in attrs.items():
|
||
|
|
if k in ('__module__', '__init__', '_overrides', '__doc__'):
|
||
|
|
continue # Skip the important stuff.
|
||
|
|
# Give the function a function attribute "custom" to designate that
|
||
|
|
# it's a custom function/method.
|
||
|
|
v.custom = True
|
||
|
|
if k.startswith(MODEL_FUNCTIONS_PREFIX):
|
||
|
|
custom_functions[k[len(MODEL_FUNCTIONS_PREFIX):]] = v
|
||
|
|
elif k.startswith(MANIPULATOR_FUNCTIONS_PREFIX):
|
||
|
|
manipulator_methods[k[len(MANIPULATOR_FUNCTIONS_PREFIX):]] = v
|
||
|
|
else:
|
||
|
|
custom_methods[k] = v
|
||
|
|
del attrs[k]
|
||
|
|
|
||
|
|
# Create the module-level ObjectDoesNotExist exception.
|
||
|
|
dne_exc_name = '%sDoesNotExist' % name
|
||
|
|
does_not_exist_exception = types.ClassType(dne_exc_name, (ObjectDoesNotExist,), {})
|
||
|
|
# Explicitly set its __module__ because it will initially (incorrectly)
|
||
|
|
# be set to the module the code is being executed in.
|
||
|
|
does_not_exist_exception.__module__ = MODEL_PREFIX + '.' + opts.module_name
|
||
|
|
setattr(new_mod, dne_exc_name, does_not_exist_exception)
|
||
|
|
|
||
|
|
# Create other exceptions.
|
||
|
|
for exception_name in opts.exceptions:
|
||
|
|
exc = types.ClassType(exception_name, (Exception,), {})
|
||
|
|
exc.__module__ = MODEL_PREFIX + '.' + opts.module_name # Set this explicitly, as above.
|
||
|
|
setattr(new_mod, exception_name, exc)
|
||
|
|
|
||
|
|
# Create any module-level constants, if applicable.
|
||
|
|
for k, v in opts.module_constants.items():
|
||
|
|
setattr(new_mod, k, v)
|
||
|
|
|
||
|
|
# Create the default class methods.
|
||
|
|
attrs['__init__'] = curry(method_init, opts)
|
||
|
|
attrs['__eq__'] = curry(method_eq, opts)
|
||
|
|
attrs['save'] = curry(method_save, opts)
|
||
|
|
attrs['save'].alters_data = True
|
||
|
|
attrs['delete'] = curry(method_delete, opts)
|
||
|
|
attrs['delete'].alters_data = True
|
||
|
|
|
||
|
|
if opts.order_with_respect_to:
|
||
|
|
attrs['get_next_in_order'] = curry(method_get_next_in_order, opts, opts.order_with_respect_to)
|
||
|
|
attrs['get_previous_in_order'] = curry(method_get_previous_in_order, opts, opts.order_with_respect_to)
|
||
|
|
|
||
|
|
for f in opts.fields:
|
||
|
|
# If the object has a relationship to itself, as designated by
|
||
|
|
# RECURSIVE_RELATIONSHIP_CONSTANT, create that relationship formally.
|
||
|
|
if f.rel and f.rel.to == RECURSIVE_RELATIONSHIP_CONSTANT:
|
||
|
|
f.rel.to = opts
|
||
|
|
# Add "get_thingie" methods for many-to-one related objects.
|
||
|
|
# EXAMPLES: Choice.get_poll(), Story.get_dateline()
|
||
|
|
if isinstance(f.rel, ManyToOne):
|
||
|
|
func = curry(method_get_many_to_one, f)
|
||
|
|
func.__doc__ = "Returns the associated `%s.%s` object." % (f.rel.to.app_label, f.rel.to.module_name)
|
||
|
|
attrs['get_%s' % f.rel.name] = func
|
||
|
|
|
||
|
|
for f in opts.many_to_many:
|
||
|
|
# Add "get_thingie" methods for many-to-many related objects.
|
||
|
|
# EXAMPLES: Poll.get_sites(), Story.get_bylines()
|
||
|
|
func = curry(method_get_many_to_many, f)
|
||
|
|
func.__doc__ = "Returns a list of associated `%s.%s` objects." % (f.rel.to.app_label, f.rel.to.module_name)
|
||
|
|
attrs['get_%s' % f.name] = func
|
||
|
|
# Add "set_thingie" methods for many-to-many related objects.
|
||
|
|
# EXAMPLES: Poll.set_sites(), Story.set_bylines()
|
||
|
|
func = curry(method_set_many_to_many, f)
|
||
|
|
func.__doc__ = "Resets this object's `%s.%s` list to the given list of IDs. Note that it doesn't check whether the given IDs are valid." % (f.rel.to.app_label, f.rel.to.module_name)
|
||
|
|
func.alters_data = True
|
||
|
|
attrs['set_%s' % f.name] = func
|
||
|
|
|
||
|
|
# Create the class, because we need it to use in currying.
|
||
|
|
new_class = type.__new__(cls, name, bases, attrs)
|
||
|
|
|
||
|
|
# Give the class a docstring -- its definition.
|
||
|
|
new_class.__doc__ = "%s.%s(%s)" % (opts.module_name, name, ", ".join([f.name for f in opts.fields]))
|
||
|
|
|
||
|
|
# Create the standard, module-level API helper functions such
|
||
|
|
# as get_object() and get_list().
|
||
|
|
new_mod.get_object = curry(function_get_object, opts, new_class, does_not_exist_exception)
|
||
|
|
new_mod.get_object.__doc__ = "Returns the %s object matching the given parameters." % name
|
||
|
|
|
||
|
|
new_mod.get_list = curry(function_get_list, opts, new_class)
|
||
|
|
new_mod.get_list.__doc__ = "Returns a list of %s objects matching the given parameters." % name
|
||
|
|
|
||
|
|
new_mod.get_iterator = curry(function_get_iterator, opts, new_class)
|
||
|
|
new_mod.get_iterator.__doc__ = "Returns an iterator of %s objects matching the given parameters." % name
|
||
|
|
|
||
|
|
new_mod.get_count = curry(function_get_count, opts)
|
||
|
|
new_mod.get_count.__doc__ = "Returns the number of %s objects matching the given parameters." % name
|
||
|
|
|
||
|
|
new_mod._get_sql_clause = curry(function_get_sql_clause, opts)
|
||
|
|
|
||
|
|
new_mod.get_in_bulk = curry(function_get_in_bulk, opts, new_class)
|
||
|
|
new_mod.get_in_bulk.__doc__ = "Returns a dictionary of ID -> %s for the %s objects with IDs in the given id_list." % (name, name)
|
||
|
|
|
||
|
|
if opts.get_latest_by:
|
||
|
|
new_mod.get_latest = curry(function_get_latest, opts, new_class, does_not_exist_exception)
|
||
|
|
|
||
|
|
for f in opts.fields:
|
||
|
|
if isinstance(f, DateField) or isinstance(f, DateTimeField):
|
||
|
|
# Add "get_next_by_thingie" and "get_previous_by_thingie" methods
|
||
|
|
# for all DateFields and DateTimeFields that cannot be null.
|
||
|
|
# EXAMPLES: Poll.get_next_by_pub_date(), Poll.get_previous_by_pub_date()
|
||
|
|
if not f.null:
|
||
|
|
setattr(new_class, 'get_next_by_%s' % f.name, curry(method_get_next_or_previous, new_mod.get_object, f, True))
|
||
|
|
setattr(new_class, 'get_previous_by_%s' % f.name, curry(method_get_next_or_previous, new_mod.get_object, f, False))
|
||
|
|
# Add "get_thingie_list" for all DateFields and DateTimeFields.
|
||
|
|
# EXAMPLE: polls.get_pub_date_list()
|
||
|
|
func = curry(function_get_date_list, opts, f)
|
||
|
|
func.__doc__ = "Returns a list of days, months or years (as datetime.datetime objects) in which %s objects are available. The first parameter ('kind') must be one of 'year', 'month' or 'day'." % name
|
||
|
|
setattr(new_mod, 'get_%s_list' % f.name, func)
|
||
|
|
|
||
|
|
elif isinstance(f, FileField):
|
||
|
|
setattr(new_class, 'get_%s_filename' % f.name, curry(method_get_file_filename, f))
|
||
|
|
setattr(new_class, 'get_%s_url' % f.name, curry(method_get_file_url, f))
|
||
|
|
setattr(new_class, 'get_%s_size' % f.name, curry(method_get_file_size, f))
|
||
|
|
func = curry(method_save_file, f)
|
||
|
|
func.alters_data = True
|
||
|
|
setattr(new_class, 'save_%s_file' % f.name, func)
|
||
|
|
if isinstance(f, ImageField):
|
||
|
|
# Add get_BLAH_width and get_BLAH_height methods, but only
|
||
|
|
# if the image field doesn't have width and height cache
|
||
|
|
# fields.
|
||
|
|
if not f.width_field:
|
||
|
|
setattr(new_class, 'get_%s_width' % f.name, curry(method_get_image_width, f))
|
||
|
|
if not f.height_field:
|
||
|
|
setattr(new_class, 'get_%s_height' % f.name, curry(method_get_image_height, f))
|
||
|
|
|
||
|
|
# Add the class itself to the new module we've created.
|
||
|
|
new_mod.__dict__[name] = new_class
|
||
|
|
|
||
|
|
# Add "Klass" -- a shortcut reference to the class.
|
||
|
|
new_mod.__dict__['Klass'] = new_class
|
||
|
|
|
||
|
|
# Add the Manipulators.
|
||
|
|
new_mod.__dict__['AddManipulator'] = get_manipulator(opts, new_class, manipulator_methods, add=True)
|
||
|
|
new_mod.__dict__['ChangeManipulator'] = get_manipulator(opts, new_class, manipulator_methods, change=True)
|
||
|
|
|
||
|
|
# Now that we have references to new_mod and new_class, we can add
|
||
|
|
# any/all extra class methods to the new class. Note that we could
|
||
|
|
# have just left the extra methods in attrs (above), but that would
|
||
|
|
# have meant that any code within the extra methods would *not* have
|
||
|
|
# access to module-level globals, such as get_list(), db, etc.
|
||
|
|
# In order to give these methods access to those globals, we have to
|
||
|
|
# deconstruct the method getting its raw "code" object, then recreating
|
||
|
|
# the function with a new "globals" dictionary.
|
||
|
|
#
|
||
|
|
# To complicate matters more, because each method is manually assigned
|
||
|
|
# a "globals" value, that "globals" value does NOT include the methods
|
||
|
|
# that haven't been created yet. For instance, if there are two custom
|
||
|
|
# methods, foo() and bar(), and foo() is created first, it won't have
|
||
|
|
# bar() within its globals(). This is a problem because sometimes
|
||
|
|
# custom methods/functions refer to other custom methods/functions. To
|
||
|
|
# solve this problem, we keep track of the new functions created (in
|
||
|
|
# the new_functions variable) and manually append each new function to
|
||
|
|
# the func_globals() of all previously-created functions. So, by the
|
||
|
|
# end of the loop, all functions will "know" about all the other
|
||
|
|
# functions.
|
||
|
|
_reassign_globals(custom_methods, new_mod, new_class)
|
||
|
|
_reassign_globals(custom_functions, new_mod, new_mod)
|
||
|
|
_reassign_globals(manipulator_methods, new_mod, new_mod.__dict__['AddManipulator'])
|
||
|
|
_reassign_globals(manipulator_methods, new_mod, new_mod.__dict__['ChangeManipulator'])
|
||
|
|
|
||
|
|
if hasattr(new_class, 'get_absolute_url'):
|
||
|
|
new_class.get_absolute_url = curry(get_absolute_url, opts, new_class.get_absolute_url)
|
||
|
|
|
||
|
|
# Get a reference to the module the class is in, and dynamically add
|
||
|
|
# the new module to it.
|
||
|
|
app_package = sys.modules.get(new_class.__module__)
|
||
|
|
if replaces_module is not None:
|
||
|
|
app_label = replaces_module[0]
|
||
|
|
else:
|
||
|
|
app_package.__dict__[opts.module_name] = new_mod
|
||
|
|
app_label = app_package.__name__[app_package.__name__.rfind('.')+1:]
|
||
|
|
|
||
|
|
# Populate the _MODELS member on the module the class is in.
|
||
|
|
# Example: django.models.polls will have a _MODELS member that will
|
||
|
|
# contain this list:
|
||
|
|
# [<class 'django.models.polls.Poll'>, <class 'django.models.polls.Choice'>]
|
||
|
|
# Don't do this if replaces_module is set.
|
||
|
|
app_package.__dict__.setdefault('_MODELS', []).append(new_class)
|
||
|
|
|
||
|
|
# Cache the app label.
|
||
|
|
opts.app_label = app_label
|
||
|
|
|
||
|
|
# If the db_table wasn't provided, use the app_label + module_name.
|
||
|
|
if not opts.db_table:
|
||
|
|
opts.db_table = "%s_%s" % (app_label, opts.module_name)
|
||
|
|
new_class._meta = opts
|
||
|
|
|
||
|
|
# Set the __file__ attribute to the __file__ attribute of its package,
|
||
|
|
# because they're technically from the same file. Note: if we didn't
|
||
|
|
# set this, sys.modules would think this module was built-in.
|
||
|
|
try:
|
||
|
|
new_mod.__file__ = app_package.__file__
|
||
|
|
except AttributeError:
|
||
|
|
# 'module' object has no attribute '__file__', which means the
|
||
|
|
# class was probably being entered via the interactive interpreter.
|
||
|
|
pass
|
||
|
|
|
||
|
|
# Add the module's entry to sys.modules -- for instance,
|
||
|
|
# "django.models.polls.polls". Note that "django.models.polls" has already
|
||
|
|
# been added automatically.
|
||
|
|
sys.modules.setdefault('%s.%s.%s' % (MODEL_PREFIX, app_label, opts.module_name), new_mod)
|
||
|
|
|
||
|
|
# If this module replaces another one, get a reference to the other
|
||
|
|
# module's parent, and replace the other module with the one we've just
|
||
|
|
# created.
|
||
|
|
if replaces_module is not None:
|
||
|
|
old_app = get_app(replaces_module[0])
|
||
|
|
setattr(old_app, replaces_module[1], new_mod)
|
||
|
|
for i, model in enumerate(old_app._MODELS):
|
||
|
|
if model._meta.module_name == replaces_module[1]:
|
||
|
|
# Replace the appropriate member of the old app's _MODELS
|
||
|
|
# data structure.
|
||
|
|
old_app._MODELS[i] = new_class
|
||
|
|
# Replace all relationships to the old class with
|
||
|
|
# relationships to the new one.
|
||
|
|
for rel_opts, rel_field in model._meta.get_all_related_objects():
|
||
|
|
rel_field.rel.to = opts
|
||
|
|
for rel_opts, rel_field in model._meta.get_all_related_many_to_many_objects():
|
||
|
|
rel_field.rel.to = opts
|
||
|
|
break
|
||
|
|
|
||
|
|
return new_class
|
||
|
|
|
||
|
|
class Model:
|
||
|
|
__metaclass__ = ModelBase
|
||
|
|
|
||
|
|
############################################
|
||
|
|
# HELPER FUNCTIONS (CURRIED MODEL METHODS) #
|
||
|
|
############################################
|
||
|
|
|
||
|
|
# CORE METHODS #############################
|
||
|
|
|
||
|
|
def method_init(opts, self, *args, **kwargs):
|
||
|
|
for i, arg in enumerate(args):
|
||
|
|
setattr(self, opts.fields[i].name, arg)
|
||
|
|
for k, v in kwargs.items():
|
||
|
|
try:
|
||
|
|
opts.get_field(k, many_to_many=False)
|
||
|
|
except FieldDoesNotExist:
|
||
|
|
raise TypeError, "'%s' is an invalid keyword argument for this function" % k
|
||
|
|
setattr(self, k, v)
|
||
|
|
|
||
|
|
def method_eq(opts, self, other):
|
||
|
|
return isinstance(other, self.__class__) and getattr(self, opts.pk.name) == getattr(other, opts.pk.name)
|
||
|
|
|
||
|
|
def method_save(opts, self):
|
||
|
|
# Run any pre-save hooks.
|
||
|
|
if hasattr(self, '_pre_save'):
|
||
|
|
self._pre_save()
|
||
|
|
non_pks = [f for f in opts.fields if not f.primary_key]
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
add = not bool(getattr(self, opts.pk.name))
|
||
|
|
for f in non_pks:
|
||
|
|
f.pre_save(self, getattr(self, f.name), add)
|
||
|
|
db_values = [f.get_db_prep_save(getattr(self, f.name), add) for f in non_pks]
|
||
|
|
# OneToOne objects are a special case because there's no AutoField, and the
|
||
|
|
# primary key field is set manually.
|
||
|
|
if isinstance(opts.pk.rel, OneToOne):
|
||
|
|
cursor.execute("UPDATE %s SET %s WHERE %s=%%s" % \
|
||
|
|
(opts.db_table, ','.join(['%s=%%s' % f.name for f in non_pks]),
|
||
|
|
opts.pk.name), db_values + [getattr(self, opts.pk.name)])
|
||
|
|
if cursor.rowcount == 0: # If nothing was updated, add the record.
|
||
|
|
field_names = [f.name for f in opts.fields]
|
||
|
|
placeholders = ['%s'] * len(field_names)
|
||
|
|
cursor.execute("INSERT INTO %s (%s) VALUES (%s)" % \
|
||
|
|
(opts.db_table, ','.join(field_names), ','.join(placeholders)),
|
||
|
|
[f.get_db_prep_save(getattr(self, f.name), add=True) for f in opts.fields])
|
||
|
|
else:
|
||
|
|
if not add:
|
||
|
|
cursor.execute("UPDATE %s SET %s WHERE %s=%%s" % \
|
||
|
|
(opts.db_table, ','.join(['%s=%%s' % f.name for f in non_pks]),
|
||
|
|
opts.pk.name), db_values + [getattr(self, opts.pk.name)])
|
||
|
|
else:
|
||
|
|
field_names = [f.name for f in non_pks]
|
||
|
|
placeholders = ['%s'] * len(field_names)
|
||
|
|
if opts.order_with_respect_to:
|
||
|
|
field_names.append('_order')
|
||
|
|
placeholders.append('(SELECT COUNT(*) FROM %s WHERE %s = %%s)' % \
|
||
|
|
(opts.db_table, opts.order_with_respect_to.name))
|
||
|
|
db_values.append(getattr(self, opts.order_with_respect_to.name))
|
||
|
|
cursor.execute("INSERT INTO %s (%s) VALUES (%s)" % \
|
||
|
|
(opts.db_table, ','.join(field_names), ','.join(placeholders)), db_values)
|
||
|
|
setattr(self, opts.pk.name, db.get_last_insert_id(cursor, opts.db_table, opts.pk.name))
|
||
|
|
db.db.commit()
|
||
|
|
# Run any post-save hooks.
|
||
|
|
if hasattr(self, '_post_save'):
|
||
|
|
self._post_save()
|
||
|
|
|
||
|
|
def method_delete(opts, self):
|
||
|
|
assert getattr(self, opts.pk.name) is not None, "%r can't be deleted because it doesn't have an ID."
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
for rel_opts, rel_field in opts.get_all_related_objects():
|
||
|
|
rel_opts_name = opts.get_rel_object_method_name(rel_opts, rel_field)
|
||
|
|
if isinstance(rel_field.rel, OneToOne):
|
||
|
|
try:
|
||
|
|
sub_obj = getattr(self, 'get_%s' % rel_opts_name)()
|
||
|
|
except ObjectDoesNotExist:
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
sub_obj.delete()
|
||
|
|
else:
|
||
|
|
for sub_obj in getattr(self, 'get_%s_list' % rel_opts_name)():
|
||
|
|
sub_obj.delete()
|
||
|
|
for rel_opts, rel_field in opts.get_all_related_many_to_many_objects():
|
||
|
|
cursor.execute("DELETE FROM %s WHERE %s_id=%%s" % (rel_field.get_m2m_db_table(rel_opts),
|
||
|
|
self._meta.object_name.lower()), [getattr(self, opts.pk.name)])
|
||
|
|
cursor.execute("DELETE FROM %s WHERE %s=%%s" % (opts.db_table, opts.pk.name), [getattr(self, opts.pk.name)])
|
||
|
|
db.db.commit()
|
||
|
|
setattr(self, opts.pk.name, None)
|
||
|
|
for f in opts.fields:
|
||
|
|
if isinstance(f, FileField) and getattr(self, f.name):
|
||
|
|
file_name = getattr(self, 'get_%s_filename' % f.name)()
|
||
|
|
# If the file exists and no other object of this type references it,
|
||
|
|
# delete it from the filesystem.
|
||
|
|
if os.path.exists(file_name) and not opts.get_model_module().get_list(**{'%s__exact' % f.name: getattr(self, f.name)}):
|
||
|
|
os.remove(file_name)
|
||
|
|
|
||
|
|
def method_get_next_in_order(opts, order_field, self):
|
||
|
|
if not hasattr(self, '_next_in_order_cache'):
|
||
|
|
self._next_in_order_cache = opts.get_model_module().get_object(order_by=(('_order', 'ASC'),),
|
||
|
|
where=['_order > (SELECT _order FROM %s WHERE %s=%%s)' % (opts.db_table, opts.pk.name),
|
||
|
|
'%s=%%s' % order_field.name], limit=1,
|
||
|
|
params=[getattr(self, opts.pk.name), getattr(self, order_field.name)])
|
||
|
|
return self._next_in_order_cache
|
||
|
|
|
||
|
|
def method_get_previous_in_order(opts, order_field, self):
|
||
|
|
if not hasattr(self, '_previous_in_order_cache'):
|
||
|
|
self._previous_in_order_cache = opts.get_model_module().get_object(order_by=(('_order', 'DESC'),),
|
||
|
|
where=['_order < (SELECT _order FROM %s WHERE %s=%%s)' % (opts.db_table, opts.pk.name),
|
||
|
|
'%s=%%s' % order_field.name], limit=1,
|
||
|
|
params=[getattr(self, opts.pk.name), getattr(self, order_field.name)])
|
||
|
|
return self._previous_in_order_cache
|
||
|
|
|
||
|
|
# RELATIONSHIP METHODS #####################
|
||
|
|
|
||
|
|
# Example: Story.get_dateline()
|
||
|
|
def method_get_many_to_one(field_with_rel, self):
|
||
|
|
cache_var = field_with_rel.rel.get_cache_name()
|
||
|
|
if not hasattr(self, cache_var):
|
||
|
|
val = getattr(self, field_with_rel.name)
|
||
|
|
mod = field_with_rel.rel.to.get_model_module()
|
||
|
|
if val is None:
|
||
|
|
raise getattr(mod, '%sDoesNotExist' % field_with_rel.rel.to.object_name)
|
||
|
|
retrieved_obj = mod.get_object(**{'%s__exact' % field_with_rel.rel.field_name: val})
|
||
|
|
setattr(self, cache_var, retrieved_obj)
|
||
|
|
return getattr(self, cache_var)
|
||
|
|
|
||
|
|
# Handles getting many-to-many related objects.
|
||
|
|
# Example: Poll.get_sites()
|
||
|
|
def method_get_many_to_many(field_with_rel, self):
|
||
|
|
rel = field_with_rel.rel.to
|
||
|
|
cache_var = '_%s_cache' % field_with_rel.name
|
||
|
|
if not hasattr(self, cache_var):
|
||
|
|
mod = rel.get_model_module()
|
||
|
|
sql = "SELECT %s FROM %s a, %s b WHERE a.%s = b.%s_id AND b.%s_id = %%s %s" % \
|
||
|
|
(','.join(['a.%s' % f.name for f in rel.fields]), rel.db_table,
|
||
|
|
field_with_rel.get_m2m_db_table(self._meta), rel.pk.name,
|
||
|
|
rel.object_name.lower(), self._meta.object_name.lower(), rel.get_order_sql('a'))
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
cursor.execute(sql, [getattr(self, self._meta.pk.name)])
|
||
|
|
setattr(self, cache_var, [getattr(mod, rel.object_name)(*row) for row in cursor.fetchall()])
|
||
|
|
return getattr(self, cache_var)
|
||
|
|
|
||
|
|
# Handles setting many-to-many relationships.
|
||
|
|
# Example: Poll.set_sites()
|
||
|
|
def method_set_many_to_many(rel_field, self, id_list):
|
||
|
|
id_list = map(int, id_list) # normalize to integers
|
||
|
|
current_ids = [obj.id for obj in method_get_many_to_many(rel_field, self)]
|
||
|
|
ids_to_add, ids_to_delete = dict([(i, 1) for i in id_list]), []
|
||
|
|
for current_id in current_ids:
|
||
|
|
if current_id in id_list:
|
||
|
|
del ids_to_add[current_id]
|
||
|
|
else:
|
||
|
|
ids_to_delete.append(current_id)
|
||
|
|
ids_to_add = ids_to_add.keys()
|
||
|
|
# Now ids_to_add is a list of IDs to add, and ids_to_delete is a list of IDs to delete.
|
||
|
|
if not ids_to_delete and not ids_to_add:
|
||
|
|
return False # No change
|
||
|
|
rel = rel_field.rel.to
|
||
|
|
m2m_table = rel_field.get_m2m_db_table(self._meta)
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
this_id = getattr(self, self._meta.pk.name)
|
||
|
|
if ids_to_delete:
|
||
|
|
sql = "DELETE FROM %s WHERE %s_id = %%s AND %s_id IN (%s)" % (m2m_table, self._meta.object_name.lower(), rel.object_name.lower(), ','.join(map(str, ids_to_delete)))
|
||
|
|
cursor.execute(sql, [this_id])
|
||
|
|
if ids_to_add:
|
||
|
|
sql = "INSERT INTO %s (%s_id, %s_id) VALUES (%%s, %%s)" % (m2m_table, self._meta.object_name.lower(), rel.object_name.lower())
|
||
|
|
cursor.executemany(sql, [(this_id, i) for i in ids_to_add])
|
||
|
|
db.db.commit()
|
||
|
|
try:
|
||
|
|
delattr(self, '_%s_cache' % rel_field.name) # clear cache, if it exists
|
||
|
|
except AttributeError:
|
||
|
|
pass
|
||
|
|
return True
|
||
|
|
|
||
|
|
# Handles related-object retrieval.
|
||
|
|
# Examples: Poll.get_choice(), Poll.get_choice_list(), Poll.get_choice_count()
|
||
|
|
def method_get_related(method_name, rel_mod, rel_field, self, **kwargs):
|
||
|
|
kwargs['%s__exact' % rel_field.name] = getattr(self, rel_field.rel.field_name)
|
||
|
|
kwargs.update(rel_field.rel.lookup_overrides)
|
||
|
|
return getattr(rel_mod, method_name)(**kwargs)
|
||
|
|
|
||
|
|
# Handles adding related objects.
|
||
|
|
# Example: Poll.add_choice()
|
||
|
|
def method_add_related(rel_obj, rel_mod, rel_field, self, *args, **kwargs):
|
||
|
|
init_kwargs = dict(zip([f.name for f in rel_obj.fields if f != rel_field and not isinstance(f, AutoField)], args))
|
||
|
|
init_kwargs.update(kwargs)
|
||
|
|
for f in rel_obj.fields:
|
||
|
|
if isinstance(f, AutoField):
|
||
|
|
init_kwargs[f.name] = None
|
||
|
|
init_kwargs[rel_field.name] = getattr(self, rel_field.rel.field_name)
|
||
|
|
obj = rel_mod.Klass(**init_kwargs)
|
||
|
|
obj.save()
|
||
|
|
return obj
|
||
|
|
|
||
|
|
# Handles related many-to-many object retrieval.
|
||
|
|
# Examples: Album.get_song(), Album.get_song_list(), Album.get_song_count()
|
||
|
|
def method_get_related_many_to_many(method_name, rel_mod, rel_field, self, **kwargs):
|
||
|
|
kwargs['%s__id__exact' % rel_field.name] = self.id
|
||
|
|
return getattr(rel_mod, method_name)(**kwargs)
|
||
|
|
|
||
|
|
# Handles setting many-to-many related objects.
|
||
|
|
# Example: Album.set_songs()
|
||
|
|
def method_set_related_many_to_many(rel_opts, rel_field, self, id_list):
|
||
|
|
id_list = map(int, id_list) # normalize to integers
|
||
|
|
rel = rel_field.rel.to
|
||
|
|
m2m_table = rel_field.get_m2m_db_table(rel_opts)
|
||
|
|
this_id = getattr(self, self._meta.pk.name)
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
cursor.execute("DELETE FROM %s WHERE %s_id = %%s" % (m2m_table, rel.object_name.lower()), [this_id])
|
||
|
|
if rel_field.rel.orderable:
|
||
|
|
sql = "INSERT INTO %s (%s_id, %s_id, _order) VALUES (%%s, %%s, %%s)" % (m2m_table, rel.object_name.lower(), rel_opts.object_name.lower())
|
||
|
|
cursor.executemany(sql, [(this_id, j, i) for i, j in enumerate(id_list)])
|
||
|
|
else:
|
||
|
|
sql = "INSERT INTO %s (%s_id, %s_id) VALUES (%%s, %%s)" % (m2m_table, rel.object_name.lower(), rel_opts.object_name.lower())
|
||
|
|
cursor.executemany(sql, [(this_id, i) for i in id_list])
|
||
|
|
db.db.commit()
|
||
|
|
|
||
|
|
# ORDERING METHODS #########################
|
||
|
|
|
||
|
|
def method_set_order(ordered_obj, self, id_list):
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
# Example: "UPDATE poll_choices SET _order = %s WHERE poll_id = %s AND id = %s"
|
||
|
|
sql = "UPDATE %s SET _order = %%s WHERE %s = %%s AND %s = %%s" % (ordered_obj.db_table, ordered_obj.order_with_respect_to.name, ordered_obj.pk.name)
|
||
|
|
rel_val = getattr(self, ordered_obj.order_with_respect_to.rel.field_name)
|
||
|
|
cursor.executemany(sql, [(i, rel_val, j) for i, j in enumerate(id_list)])
|
||
|
|
db.db.commit()
|
||
|
|
|
||
|
|
def method_get_order(ordered_obj, self):
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
# Example: "SELECT id FROM poll_choices WHERE poll_id = %s ORDER BY _order"
|
||
|
|
sql = "SELECT %s FROM %s WHERE %s = %%s ORDER BY _order" % (ordered_obj.pk.name, ordered_obj.db_table, ordered_obj.order_with_respect_to.name)
|
||
|
|
rel_val = getattr(self, ordered_obj.order_with_respect_to.rel.field_name)
|
||
|
|
cursor.execute(sql, [rel_val])
|
||
|
|
return [r[0] for r in cursor.fetchall()]
|
||
|
|
|
||
|
|
# DATE-RELATED METHODS #####################
|
||
|
|
|
||
|
|
def method_get_next_or_previous(get_object_func, field, is_next, self, **kwargs):
|
||
|
|
kwargs.setdefault('where', []).append('%s %s %%s' % (field.name, (is_next and '>' or '<')))
|
||
|
|
kwargs.setdefault('params', []).append(str(getattr(self, field.name)))
|
||
|
|
kwargs['order_by'] = ((field.name, (is_next and 'ASC' or 'DESC')),)
|
||
|
|
kwargs['limit'] = 1
|
||
|
|
return get_object_func(**kwargs)
|
||
|
|
|
||
|
|
# FILE-RELATED METHODS #####################
|
||
|
|
|
||
|
|
def method_get_file_filename(field, self):
|
||
|
|
return os.path.join(settings.MEDIA_ROOT, getattr(self, field.name))
|
||
|
|
|
||
|
|
def method_get_file_url(field, self):
|
||
|
|
if getattr(self, field.name): # value is not blank
|
||
|
|
import urlparse
|
||
|
|
return urlparse.urljoin(settings.MEDIA_URL, getattr(self, field.name))
|
||
|
|
return ''
|
||
|
|
|
||
|
|
def method_get_file_size(field, self):
|
||
|
|
return os.path.getsize(method_get_file_filename(field, self))
|
||
|
|
|
||
|
|
def method_save_file(field, self, filename, raw_contents):
|
||
|
|
directory = field.get_directory_name()
|
||
|
|
try: # Create the date-based directory if it doesn't exist.
|
||
|
|
os.makedirs(os.path.join(settings.MEDIA_ROOT, directory))
|
||
|
|
except OSError: # Directory probably already exists.
|
||
|
|
pass
|
||
|
|
filename = field.get_filename(filename)
|
||
|
|
|
||
|
|
# If the filename already exists, keep adding an underscore to the name of
|
||
|
|
# the file until the filename doesn't exist.
|
||
|
|
while os.path.exists(os.path.join(settings.MEDIA_ROOT, filename)):
|
||
|
|
try:
|
||
|
|
dot_index = filename.rindex('.')
|
||
|
|
except ValueError: # filename has no dot
|
||
|
|
filename += '_'
|
||
|
|
else:
|
||
|
|
filename = filename[:dot_index] + '_' + filename[dot_index:]
|
||
|
|
|
||
|
|
# Write the file to disk.
|
||
|
|
setattr(self, field.name, filename)
|
||
|
|
fp = open(getattr(self, 'get_%s_filename' % field.name)(), 'w')
|
||
|
|
fp.write(raw_contents)
|
||
|
|
fp.close()
|
||
|
|
|
||
|
|
# Save the width and/or height, if applicable.
|
||
|
|
if isinstance(field, ImageField) and (field.width_field or field.height_field):
|
||
|
|
from django.utils.images import get_image_dimensions
|
||
|
|
width, height = get_image_dimensions(getattr(self, 'get_%s_filename' % field.name)())
|
||
|
|
if field.width_field:
|
||
|
|
setattr(self, field.width_field, width)
|
||
|
|
if field.height_field:
|
||
|
|
setattr(self, field.height_field, height)
|
||
|
|
|
||
|
|
# Save the object, because it has changed.
|
||
|
|
self.save()
|
||
|
|
|
||
|
|
# IMAGE FIELD METHODS ######################
|
||
|
|
|
||
|
|
def method_get_image_width(field, self):
|
||
|
|
return _get_image_dimensions(field, self)[0]
|
||
|
|
|
||
|
|
def method_get_image_height(field, self):
|
||
|
|
return _get_image_dimensions(field, self)[1]
|
||
|
|
|
||
|
|
def _get_image_dimensions(field, self):
|
||
|
|
cachename = "__%s_dimensions_cache" % field.name
|
||
|
|
if not hasattr(self, cachename):
|
||
|
|
from django.utils.images import get_image_dimensions
|
||
|
|
fname = getattr(self, "get_%s_filename" % field.name)()
|
||
|
|
setattr(self, cachename, get_image_dimensions(fname))
|
||
|
|
return getattr(self, cachename)
|
||
|
|
|
||
|
|
##############################################
|
||
|
|
# HELPER FUNCTIONS (CURRIED MODEL FUNCTIONS) #
|
||
|
|
##############################################
|
||
|
|
|
||
|
|
def get_absolute_url(opts, func, self):
|
||
|
|
return settings.ABSOLUTE_URL_OVERRIDES.get('%s.%s' % (opts.app_label, opts.module_name), func)(self)
|
||
|
|
|
||
|
|
def _get_where_clause(lookup_type, table_prefix, field_name, value):
|
||
|
|
try:
|
||
|
|
return '%s%s %s %%s' % (table_prefix, field_name, db.OPERATOR_MAPPING[lookup_type])
|
||
|
|
except KeyError:
|
||
|
|
pass
|
||
|
|
if lookup_type in ('range', 'year'):
|
||
|
|
return '%s%s BETWEEN %%s AND %%s' % (table_prefix, field_name)
|
||
|
|
elif lookup_type in ('month', 'day'):
|
||
|
|
return "EXTRACT('%s' FROM %s%s) = %%s" % (lookup_type, table_prefix, field_name)
|
||
|
|
elif lookup_type == 'isnull':
|
||
|
|
return "%s%s IS %sNULL" % (table_prefix, field_name, (not value and 'NOT ' or ''))
|
||
|
|
raise TypeError, "Got invalid lookup_type: %s" % repr(lookup_type)
|
||
|
|
|
||
|
|
def function_get_object(opts, klass, does_not_exist_exception, **kwargs):
|
||
|
|
obj_list = function_get_list(opts, klass, **kwargs)
|
||
|
|
if len(obj_list) < 1:
|
||
|
|
raise does_not_exist_exception, "%s does not exist for %s" % (opts.object_name, kwargs)
|
||
|
|
assert len(obj_list) == 1, "get_object() returned more than one %s -- it returned %s! Lookup parameters were %s" % (opts.object_name, len(obj_list), kwargs)
|
||
|
|
return obj_list[0]
|
||
|
|
|
||
|
|
def _get_cached_row(opts, row, index_start):
|
||
|
|
"Helper function that recursively returns an object with cache filled"
|
||
|
|
index_end = index_start + len(opts.fields)
|
||
|
|
obj = opts.get_model_module().Klass(*row[index_start:index_end])
|
||
|
|
for f in opts.fields:
|
||
|
|
if f.rel and not f.null:
|
||
|
|
rel_obj, index_end = _get_cached_row(f.rel.to, row, index_end)
|
||
|
|
setattr(obj, f.rel.get_cache_name(), rel_obj)
|
||
|
|
return obj, index_end
|
||
|
|
|
||
|
|
def function_get_list(opts, klass, **kwargs):
|
||
|
|
# kwargs['select'] is a dictionary, and dictionaries' key order is
|
||
|
|
# undefined, so we convert it to a list of tuples internally.
|
||
|
|
kwargs['select'] = kwargs.get('select', {}).items()
|
||
|
|
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
select, sql, params = function_get_sql_clause(opts, **kwargs)
|
||
|
|
cursor.execute("SELECT " + (kwargs.get('distinct') and "DISTINCT " or "") + ",".join(select) + sql, params)
|
||
|
|
obj_list = []
|
||
|
|
fill_cache = kwargs.get('select_related')
|
||
|
|
index_end = len(opts.fields)
|
||
|
|
for row in cursor.fetchall():
|
||
|
|
if fill_cache:
|
||
|
|
obj, index_end = _get_cached_row(opts, row, 0)
|
||
|
|
else:
|
||
|
|
obj = klass(*row[:index_end])
|
||
|
|
for i, k in enumerate(kwargs['select']):
|
||
|
|
setattr(obj, k[0], row[index_end+i])
|
||
|
|
obj_list.append(obj)
|
||
|
|
return obj_list
|
||
|
|
|
||
|
|
def function_get_iterator(opts, klass, **kwargs):
|
||
|
|
# kwargs['select'] is a dictionary, and dictionaries' key order is
|
||
|
|
# undefined, so we convert it to a list of tuples internally.
|
||
|
|
kwargs['select'] = kwargs.get('select', {}).items()
|
||
|
|
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
select, sql, params = function_get_sql_clause(opts, **kwargs)
|
||
|
|
cursor.execute("SELECT " + (kwargs.get('distinct') and "DISTINCT " or "") + ",".join(select) + sql, params)
|
||
|
|
fill_cache = kwargs.get('select_related')
|
||
|
|
index_end = len(opts.fields)
|
||
|
|
while 1:
|
||
|
|
rows = cursor.fetchmany(GET_ITERATOR_CHUNK_SIZE)
|
||
|
|
if not rows:
|
||
|
|
raise StopIteration
|
||
|
|
for row in rows:
|
||
|
|
if fill_cache:
|
||
|
|
obj, index_end = _get_cached_row(opts, row, 0)
|
||
|
|
else:
|
||
|
|
obj = klass(*row[:index_end])
|
||
|
|
for i, k in enumerate(kwargs['select']):
|
||
|
|
setattr(obj, k[0], row[index_end+i])
|
||
|
|
yield obj
|
||
|
|
|
||
|
|
def function_get_count(opts, **kwargs):
|
||
|
|
kwargs['order_by'] = []
|
||
|
|
kwargs['offset'] = None
|
||
|
|
kwargs['limit'] = None
|
||
|
|
kwargs['select_related'] = False
|
||
|
|
_, sql, params = function_get_sql_clause(opts, **kwargs)
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
cursor.execute("SELECT COUNT(*)" + sql, params)
|
||
|
|
return cursor.fetchone()[0]
|
||
|
|
|
||
|
|
def _fill_table_cache(opts, select, tables, where, old_prefix, cache_tables_seen):
|
||
|
|
"""
|
||
|
|
Helper function that recursively populates the select, tables and where (in
|
||
|
|
place) for fill-cache queries.
|
||
|
|
"""
|
||
|
|
for f in opts.fields:
|
||
|
|
if f.rel and not f.null:
|
||
|
|
db_table = f.rel.to.db_table
|
||
|
|
if db_table not in cache_tables_seen:
|
||
|
|
tables.append(db_table)
|
||
|
|
else: # The table was already seen, so give it a table alias.
|
||
|
|
new_prefix = '%s%s' % (db_table, len(cache_tables_seen))
|
||
|
|
tables.append('%s %s' % (db_table, new_prefix))
|
||
|
|
db_table = new_prefix
|
||
|
|
cache_tables_seen.append(db_table)
|
||
|
|
where.append('%s.%s = %s.%s' % (old_prefix, f.name, db_table, f.rel.field_name))
|
||
|
|
select.extend(['%s.%s' % (db_table, f2.name) for f2 in f.rel.to.fields])
|
||
|
|
_fill_table_cache(f.rel.to, select, tables, where, db_table, cache_tables_seen)
|
||
|
|
|
||
|
|
def _throw_bad_kwarg_error(kwarg):
|
||
|
|
# Helper function to remove redundancy.
|
||
|
|
raise TypeError, "got unexpected keyword argument '%s'" % kwarg
|
||
|
|
|
||
|
|
def _parse_lookup(kwarg_items, opts, table_count=0):
|
||
|
|
# Helper function that handles converting API kwargs (e.g.
|
||
|
|
# "name__exact": "tom") to SQL.
|
||
|
|
|
||
|
|
# Note that there is a distinction between where and join_where. The latter
|
||
|
|
# is specifically a list of where clauses to use for JOINs. This
|
||
|
|
# distinction is necessary because of support for "_or".
|
||
|
|
|
||
|
|
# table_count is used to ensure table aliases are unique.
|
||
|
|
tables, join_where, where, params = [], [], [], []
|
||
|
|
for kwarg, kwarg_value in kwarg_items:
|
||
|
|
if kwarg in ('order_by', 'limit', 'offset', 'select_related', 'distinct', 'select', 'tables', 'where', 'params'):
|
||
|
|
continue
|
||
|
|
if kwarg_value is None:
|
||
|
|
continue
|
||
|
|
if kwarg == '_or':
|
||
|
|
for val in kwarg_value:
|
||
|
|
tables2, join_where2, where2, params2, table_count = _parse_lookup(val, opts, table_count)
|
||
|
|
tables.extend(tables2)
|
||
|
|
join_where.extend(join_where2)
|
||
|
|
where.append('(%s)' % ' OR '.join(where2))
|
||
|
|
params.extend(params2)
|
||
|
|
continue
|
||
|
|
lookup_list = kwarg.split(LOOKUP_SEPARATOR)
|
||
|
|
if len(lookup_list) == 1:
|
||
|
|
_throw_bad_kwarg_error(kwarg)
|
||
|
|
lookup_type = lookup_list.pop()
|
||
|
|
current_opts = opts # We'll be overwriting this, so keep a reference to the original opts.
|
||
|
|
current_table_alias = current_opts.db_table
|
||
|
|
param_required = False
|
||
|
|
while lookup_list or param_required:
|
||
|
|
table_count += 1
|
||
|
|
try:
|
||
|
|
# "current" is a piece of the lookup list. For example, in
|
||
|
|
# choices.get_list(poll__sites__id__exact=5), lookup_list is
|
||
|
|
# ["polls", "sites", "id"], and the first current is "polls".
|
||
|
|
try:
|
||
|
|
current = lookup_list.pop(0)
|
||
|
|
except IndexError:
|
||
|
|
# If we're here, lookup_list is empty but param_required
|
||
|
|
# is set to True, which means the kwarg was bad.
|
||
|
|
# Example: choices.get_list(poll__exact='foo')
|
||
|
|
_throw_bad_kwarg_error(kwarg)
|
||
|
|
# Try many-to-many relationships first...
|
||
|
|
for f in current_opts.many_to_many:
|
||
|
|
if f.name == current:
|
||
|
|
rel_table_alias = 't%s' % table_count
|
||
|
|
table_count += 1
|
||
|
|
tables.append('%s %s' % (f.get_m2m_db_table(current_opts), rel_table_alias))
|
||
|
|
join_where.append('%s.%s = %s.%s_id' % (current_table_alias, current_opts.pk.name,
|
||
|
|
rel_table_alias, current_opts.object_name.lower()))
|
||
|
|
# Optimization: In the case of primary-key lookups, we
|
||
|
|
# don't have to do an extra join.
|
||
|
|
if lookup_list and lookup_list[0] == f.rel.to.pk.name and lookup_type == 'exact':
|
||
|
|
where.append(_get_where_clause(lookup_type, rel_table_alias+'.',
|
||
|
|
f.rel.to.object_name.lower()+'_id', kwarg_value))
|
||
|
|
params.extend(f.get_db_prep_lookup(lookup_type, kwarg_value))
|
||
|
|
lookup_list.pop()
|
||
|
|
param_required = False
|
||
|
|
else:
|
||
|
|
new_table_alias = 't%s' % table_count
|
||
|
|
tables.append('%s %s' % (f.rel.to.db_table, new_table_alias))
|
||
|
|
join_where.append('%s.%s_id = %s.%s' % (rel_table_alias, f.rel.to.object_name.lower(),
|
||
|
|
new_table_alias, f.rel.to.pk.name))
|
||
|
|
current_table_alias = new_table_alias
|
||
|
|
param_required = True
|
||
|
|
current_opts = f.rel.to
|
||
|
|
raise StopIteration
|
||
|
|
for f in current_opts.fields:
|
||
|
|
# Try many-to-one relationships...
|
||
|
|
if f.rel and f.rel.name == current:
|
||
|
|
# Optimization: In the case of primary-key lookups, we
|
||
|
|
# don't have to do an extra join.
|
||
|
|
if lookup_list and lookup_list[0] == f.rel.to.pk.name and lookup_type == 'exact':
|
||
|
|
where.append(_get_where_clause(lookup_type, current_table_alias+'.', f.name, kwarg_value))
|
||
|
|
params.extend(f.get_db_prep_lookup(lookup_type, kwarg_value))
|
||
|
|
lookup_list.pop()
|
||
|
|
param_required = False
|
||
|
|
else:
|
||
|
|
new_table_alias = 't%s' % table_count
|
||
|
|
tables.append('%s %s' % (f.rel.to.db_table, new_table_alias))
|
||
|
|
join_where.append('%s.%s = %s.%s' % (current_table_alias, f.name, new_table_alias, f.rel.to.pk.name))
|
||
|
|
current_table_alias = new_table_alias
|
||
|
|
param_required = True
|
||
|
|
current_opts = f.rel.to
|
||
|
|
raise StopIteration
|
||
|
|
# Try direct field-name lookups...
|
||
|
|
if f.name == current:
|
||
|
|
where.append(_get_where_clause(lookup_type, current_table_alias+'.', current, kwarg_value))
|
||
|
|
params.extend(f.get_db_prep_lookup(lookup_type, kwarg_value))
|
||
|
|
param_required = False
|
||
|
|
raise StopIteration
|
||
|
|
# If we haven't hit StopIteration at this point, "current" must be
|
||
|
|
# an invalid lookup, so raise an exception.
|
||
|
|
_throw_bad_kwarg_error(kwarg)
|
||
|
|
except StopIteration:
|
||
|
|
continue
|
||
|
|
return tables, join_where, where, params, table_count
|
||
|
|
|
||
|
|
def function_get_sql_clause(opts, **kwargs):
|
||
|
|
select = ["%s.%s" % (opts.db_table, f.name) for f in opts.fields]
|
||
|
|
tables = [opts.db_table] + (kwargs.get('tables') and kwargs['tables'][:] or [])
|
||
|
|
where = kwargs.get('where') and kwargs['where'][:] or []
|
||
|
|
params = kwargs.get('params') and kwargs['params'][:] or []
|
||
|
|
|
||
|
|
# Convert the kwargs into SQL.
|
||
|
|
tables2, join_where2, where2, params2, _ = _parse_lookup(kwargs.items(), opts)
|
||
|
|
tables.extend(tables2)
|
||
|
|
where.extend(join_where2 + where2)
|
||
|
|
params.extend(params2)
|
||
|
|
|
||
|
|
# Add any additional constraints from the "where_constraints" parameter.
|
||
|
|
where.extend(opts.where_constraints)
|
||
|
|
|
||
|
|
# Add additional tables and WHERE clauses based on select_related.
|
||
|
|
if kwargs.get('select_related') is True:
|
||
|
|
_fill_table_cache(opts, select, tables, where, opts.db_table, [opts.db_table])
|
||
|
|
|
||
|
|
# Add any additional SELECTs passed in via kwargs.
|
||
|
|
if kwargs.get('select', False):
|
||
|
|
select.extend(['(%s) AS %s' % (s[1], s[0]) for s in kwargs['select']])
|
||
|
|
|
||
|
|
# ORDER BY clause
|
||
|
|
order_by = []
|
||
|
|
for i, j in kwargs.get('order_by', opts.ordering):
|
||
|
|
if j == "RANDOM":
|
||
|
|
order_by.append("RANDOM()")
|
||
|
|
else:
|
||
|
|
# Append the database table as a column prefix if it wasn't given,
|
||
|
|
# and if the requested column isn't a custom SELECT.
|
||
|
|
if "." not in i and i not in [k[0] for k in kwargs.get('select', [])]:
|
||
|
|
order_by.append("%s.%s %s" % (opts.db_table, i, j))
|
||
|
|
else:
|
||
|
|
order_by.append("%s %s" % (i, j))
|
||
|
|
order_by = ", ".join(order_by)
|
||
|
|
|
||
|
|
# LIMIT and OFFSET clauses
|
||
|
|
if kwargs.get('limit') is not None:
|
||
|
|
limit_sql = " LIMIT %s " % kwargs['limit']
|
||
|
|
if kwargs.get('offset') is not None and kwargs['offset'] != 0:
|
||
|
|
limit_sql += "OFFSET %s " % kwargs['offset']
|
||
|
|
else:
|
||
|
|
limit_sql = ""
|
||
|
|
|
||
|
|
return select, " FROM " + ",".join(tables) + (where and " WHERE " + " AND ".join(where) or "") + (order_by and " ORDER BY " + order_by or "") + limit_sql, params
|
||
|
|
|
||
|
|
def function_get_in_bulk(opts, klass, *args, **kwargs):
|
||
|
|
id_list = args and args[0] or kwargs['id_list']
|
||
|
|
assert id_list != [], "get_in_bulk() cannot be passed an empty list."
|
||
|
|
kwargs['where'] = ["%s.id IN (%s)" % (opts.db_table, ",".join(map(str, id_list)))]
|
||
|
|
obj_list = function_get_list(opts, klass, **kwargs)
|
||
|
|
return dict([(o.id, o) for o in obj_list])
|
||
|
|
|
||
|
|
def function_get_latest(opts, klass, does_not_exist_exception, **kwargs):
|
||
|
|
kwargs['order_by'] = ((opts.get_latest_by, "DESC"),)
|
||
|
|
kwargs['limit'] = 1
|
||
|
|
return function_get_object(opts, klass, does_not_exist_exception, **kwargs)
|
||
|
|
|
||
|
|
def function_get_date_list(opts, field, *args, **kwargs):
|
||
|
|
kind = args and args[0] or kwargs['kind']
|
||
|
|
assert kind in ("month", "year", "day"), "'kind' must be one of 'year', 'month' or 'day'."
|
||
|
|
order = 'ASC'
|
||
|
|
if kwargs.has_key('_order'):
|
||
|
|
order = kwargs['_order']
|
||
|
|
del kwargs['_order']
|
||
|
|
assert order in ('ASC', 'DESC'), "'order' must be either 'ASC' or 'DESC'"
|
||
|
|
kwargs['order_by'] = [] # Clear this because it'll mess things up otherwise.
|
||
|
|
if field.null:
|
||
|
|
kwargs.setdefault('where', []).append('%s.%s IS NOT NULL' % (opts.db_table, field.name))
|
||
|
|
select, sql, params = function_get_sql_clause(opts, **kwargs)
|
||
|
|
sql = "SELECT DATE_TRUNC(%%s, %s.%s) %s GROUP BY 1 ORDER BY 1 %s" % (opts.db_table, field.name, sql, order)
|
||
|
|
cursor = db.db.cursor()
|
||
|
|
cursor.execute(sql, [kind] + params)
|
||
|
|
return [row[0] for row in cursor.fetchall()]
|
||
|
|
|
||
|
|
###################################
|
||
|
|
# HELPER FUNCTIONS (MANIPULATORS) #
|
||
|
|
###################################
|
||
|
|
|
||
|
|
def get_manipulator(opts, klass, extra_methods, add=False, change=False):
|
||
|
|
"Returns the custom Manipulator (either add or change) for the given opts."
|
||
|
|
assert (add == False or change == False) and add != change, "get_manipulator() can be passed add=True or change=True, but not both"
|
||
|
|
man = types.ClassType('%sManipulator%s' % (opts.object_name, add and 'Add' or 'Change'), (formfields.Manipulator,), {})
|
||
|
|
man.__module__ = MODEL_PREFIX + '.' + opts.module_name # Set this explicitly, as above.
|
||
|
|
man.__init__ = curry(manipulator_init, opts, add, change)
|
||
|
|
man.save = curry(manipulator_save, opts, klass, add, change)
|
||
|
|
for field_name_list in opts.unique_together:
|
||
|
|
setattr(man, 'isUnique%s' % '_'.join(field_name_list), curry(manipulator_validator_unique_together, field_name_list, opts))
|
||
|
|
for f in opts.fields:
|
||
|
|
if f.unique_for_date:
|
||
|
|
setattr(man, 'isUnique%sFor%s' % (f.name, f.unique_for_date), curry(manipulator_validator_unique_for_date, f, opts.get_field(f.unique_for_date), opts, 'date'))
|
||
|
|
if f.unique_for_month:
|
||
|
|
setattr(man, 'isUnique%sFor%s' % (f.name, f.unique_for_month), curry(manipulator_validator_unique_for_date, f, opts.get_field(f.unique_for_month), opts, 'month'))
|
||
|
|
if f.unique_for_year:
|
||
|
|
setattr(man, 'isUnique%sFor%s' % (f.name, f.unique_for_year), curry(manipulator_validator_unique_for_date, f, opts.get_field(f.unique_for_year), opts, 'year'))
|
||
|
|
for k, v in extra_methods.items():
|
||
|
|
setattr(man, k, v)
|
||
|
|
return man
|
||
|
|
|
||
|
|
def manipulator_init(opts, add, change, self, obj_key=None):
|
||
|
|
if change:
|
||
|
|
assert obj_key is not None, "ChangeManipulator.__init__() must be passed obj_key parameter."
|
||
|
|
self.obj_key = obj_key
|
||
|
|
try:
|
||
|
|
self.original_object = opts.get_model_module().get_object(**{'%s__exact' % opts.pk.name: obj_key})
|
||
|
|
except ObjectDoesNotExist:
|
||
|
|
# If the object doesn't exist, this might be a manipulator for a
|
||
|
|
# one-to-one related object that hasn't created its subobject yet.
|
||
|
|
# For example, this might be a Restaurant for a Place that doesn't
|
||
|
|
# yet have restaurant information.
|
||
|
|
if opts.one_to_one_field:
|
||
|
|
# Sanity check -- Make sure the "parent" object exists.
|
||
|
|
# For example, make sure the Place exists for the Restaurant.
|
||
|
|
# Let the ObjectDoesNotExist exception propogate up.
|
||
|
|
lookup_kwargs = opts.one_to_one_field.rel.limit_choices_to
|
||
|
|
lookup_kwargs['%s__exact' % opts.one_to_one_field.rel.field_name] = obj_key
|
||
|
|
_ = opts.one_to_one_field.rel.to.get_model_module().get_object(**lookup_kwargs)
|
||
|
|
params = dict([(f.name, f.get_default()) for f in opts.fields])
|
||
|
|
params[opts.pk.name] = obj_key
|
||
|
|
self.original_object = opts.get_model_module().Klass(**params)
|
||
|
|
else:
|
||
|
|
raise
|
||
|
|
self.fields = []
|
||
|
|
for f in opts.fields + opts.many_to_many:
|
||
|
|
if f.editable and (not f.rel or not f.rel.edit_inline):
|
||
|
|
self.fields.extend(f.get_manipulator_fields(opts, self, change))
|
||
|
|
|
||
|
|
# Add fields for related objects.
|
||
|
|
for rel_opts, rel_field in opts.get_inline_related_objects():
|
||
|
|
if change:
|
||
|
|
count = getattr(self.original_object, 'get_%s_count' % opts.get_rel_object_method_name(rel_opts, rel_field))()
|
||
|
|
count += rel_field.rel.num_extra_on_change
|
||
|
|
if rel_field.rel.min_num_in_admin:
|
||
|
|
count = max(count, rel_field.rel.min_num_in_admin)
|
||
|
|
if rel_field.rel.max_num_in_admin:
|
||
|
|
count = min(count, rel_field.rel.max_num_in_admin)
|
||
|
|
else:
|
||
|
|
count = rel_field.rel.num_in_admin
|
||
|
|
for f in rel_opts.fields + rel_opts.many_to_many:
|
||
|
|
if f.editable and f != rel_field and (not f.primary_key or (f.primary_key and change)):
|
||
|
|
for i in range(count):
|
||
|
|
self.fields.extend(f.get_manipulator_fields(rel_opts, self, change, name_prefix='%s.%d.' % (rel_opts.object_name.lower(), i), rel=True))
|
||
|
|
|
||
|
|
# Add field for ordering.
|
||
|
|
if change and opts.get_ordered_objects():
|
||
|
|
self.fields.append(formfields.CommaSeparatedIntegerField(field_name="order_"))
|
||
|
|
|
||
|
|
def manipulator_save(opts, klass, add, change, self, new_data):
|
||
|
|
from django.utils.datastructures import DotExpandedDict
|
||
|
|
params = {}
|
||
|
|
for f in opts.fields:
|
||
|
|
# Fields with auto_now_add are another special case; they should keep
|
||
|
|
# their original value in the change stage.
|
||
|
|
if change and getattr(f, 'auto_now_add', False):
|
||
|
|
params[f.name] = getattr(self.original_object, f.name)
|
||
|
|
else:
|
||
|
|
params[f.name] = f.get_manipulator_new_data(new_data)
|
||
|
|
|
||
|
|
if change:
|
||
|
|
params[opts.pk.name] = self.obj_key
|
||
|
|
|
||
|
|
# First, save the basic object itself.
|
||
|
|
new_object = klass(**params)
|
||
|
|
new_object.save()
|
||
|
|
|
||
|
|
# Now that the object's been saved, save any uploaded files.
|
||
|
|
for f in opts.fields:
|
||
|
|
if isinstance(f, FileField):
|
||
|
|
f.save_file(new_data, new_object, change and self.original_object or None, change, rel=False)
|
||
|
|
|
||
|
|
# Calculate which primary fields have changed.
|
||
|
|
if change:
|
||
|
|
self.fields_added, self.fields_changed, self.fields_deleted = [], [], []
|
||
|
|
for f in opts.fields:
|
||
|
|
if not f.primary_key and str(getattr(self.original_object, f.name)) != str(getattr(new_object, f.name)):
|
||
|
|
self.fields_changed.append(f.verbose_name)
|
||
|
|
|
||
|
|
# Save many-to-many objects. Example: Poll.set_sites()
|
||
|
|
for f in opts.many_to_many:
|
||
|
|
if not f.rel.edit_inline:
|
||
|
|
was_changed = getattr(new_object, 'set_%s' % f.name)(new_data.getlist(f.name))
|
||
|
|
if change and was_changed:
|
||
|
|
self.fields_changed.append(f.verbose_name)
|
||
|
|
|
||
|
|
# Save many-to-one objects. Example: Add the Choice objects for a Poll.
|
||
|
|
for rel_opts, rel_field in opts.get_inline_related_objects():
|
||
|
|
# Create obj_list, which is a DotExpandedDict such as this:
|
||
|
|
# [('0', {'id': ['940'], 'choice': ['This is the first choice']}),
|
||
|
|
# ('1', {'id': ['941'], 'choice': ['This is the second choice']}),
|
||
|
|
# ('2', {'id': [''], 'choice': ['']})]
|
||
|
|
obj_list = DotExpandedDict(new_data.data)[rel_opts.object_name.lower()].items()
|
||
|
|
obj_list.sort(lambda x, y: cmp(int(x[0]), int(y[0])))
|
||
|
|
params = {}
|
||
|
|
|
||
|
|
# For each related item...
|
||
|
|
for _, rel_new_data in obj_list:
|
||
|
|
|
||
|
|
# Keep track of which core=True fields were provided.
|
||
|
|
# If all core fields were given, the related object will be saved.
|
||
|
|
# If none of the core fields were given, the object will be deleted.
|
||
|
|
# If some, but not all, of the fields were given, the validator would
|
||
|
|
# have caught that.
|
||
|
|
all_cores_given, all_cores_blank = True, True
|
||
|
|
|
||
|
|
# Get a reference to the old object. We'll use it to compare the
|
||
|
|
# old to the new, to see which fields have changed.
|
||
|
|
if change:
|
||
|
|
old_rel_obj = None
|
||
|
|
if rel_new_data[rel_opts.pk.name][0]:
|
||
|
|
try:
|
||
|
|
old_rel_obj = getattr(self.original_object, 'get_%s' % opts.get_rel_object_method_name(rel_opts, rel_field))(**{'%s__exact' % rel_opts.pk.name: rel_new_data[rel_opts.pk.name][0]})
|
||
|
|
except ObjectDoesNotExist:
|
||
|
|
pass
|
||
|
|
|
||
|
|
for f in rel_opts.fields:
|
||
|
|
if f.core and not isinstance(f, FileField) and f.get_manipulator_new_data(rel_new_data, rel=True) in (None, ''):
|
||
|
|
all_cores_given = False
|
||
|
|
elif f.core and not isinstance(f, FileField) and f.get_manipulator_new_data(rel_new_data, rel=True) not in (None, ''):
|
||
|
|
all_cores_blank = False
|
||
|
|
# If this field isn't editable, give it the same value it had
|
||
|
|
# previously, according to the given ID. If the ID wasn't
|
||
|
|
# given, use a default value. FileFields are also a special
|
||
|
|
# case, because they'll be dealt with later.
|
||
|
|
if change and (isinstance(f, FileField) or not f.editable):
|
||
|
|
if rel_new_data.get(rel_opts.pk.name, False) and rel_new_data[rel_opts.pk.name][0]:
|
||
|
|
params[f.name] = getattr(old_rel_obj, f.name)
|
||
|
|
else:
|
||
|
|
params[f.name] = f.get_default()
|
||
|
|
elif f == rel_field:
|
||
|
|
params[f.name] = getattr(new_object, rel_field.rel.field_name)
|
||
|
|
elif add and isinstance(f, AutoField):
|
||
|
|
params[f.name] = None
|
||
|
|
else:
|
||
|
|
params[f.name] = f.get_manipulator_new_data(rel_new_data, rel=True)
|
||
|
|
# Related links are a special case, because we have to
|
||
|
|
# manually set the "content_type_id" field.
|
||
|
|
if opts.has_related_links and rel_opts.module_name == 'relatedlinks':
|
||
|
|
contenttypes_mod = get_module('core', 'contenttypes')
|
||
|
|
params['content_type_id'] = contenttypes_mod.get_object(package__label__exact=opts.app_label, python_module_name__exact=opts.module_name).id
|
||
|
|
params['object_id'] = new_object.id
|
||
|
|
|
||
|
|
# Create the related item.
|
||
|
|
new_rel_obj = rel_opts.get_model_module().Klass(**params)
|
||
|
|
|
||
|
|
# If all the core fields were provided (non-empty), save the item.
|
||
|
|
if all_cores_given:
|
||
|
|
new_rel_obj.save()
|
||
|
|
|
||
|
|
# Save any uploaded files.
|
||
|
|
for f in rel_opts.fields:
|
||
|
|
if isinstance(f, FileField) and rel_new_data.get(f.name, False):
|
||
|
|
f.save_file(rel_new_data, new_rel_obj, change and old_rel_obj or None, change, rel=True)
|
||
|
|
|
||
|
|
# Calculate whether any fields have changed.
|
||
|
|
if change:
|
||
|
|
if not old_rel_obj: # This object didn't exist before.
|
||
|
|
self.fields_added.append('%s "%r"' % (rel_opts.verbose_name, new_rel_obj))
|
||
|
|
else:
|
||
|
|
for f in rel_opts.fields:
|
||
|
|
if not f.primary_key and f != rel_field and str(getattr(old_rel_obj, f.name)) != str(getattr(new_rel_obj, f.name)):
|
||
|
|
self.fields_changed.append('%s for %s "%r"' % (f.verbose_name, rel_opts.verbose_name, new_rel_obj))
|
||
|
|
|
||
|
|
# Save many-to-many objects.
|
||
|
|
for f in rel_opts.many_to_many:
|
||
|
|
if not f.rel.edit_inline:
|
||
|
|
was_changed = getattr(new_rel_obj, 'set_%s' % f.name)(rel_new_data[f.name])
|
||
|
|
if change and was_changed:
|
||
|
|
self.fields_changed.append('%s for %s "%s"' % (f.verbose_name, rel_opts.verbose_name, new_rel_obj))
|
||
|
|
|
||
|
|
# If, in the change stage, all of the core fields were blank and
|
||
|
|
# the primary key (ID) was provided, delete the item.
|
||
|
|
if change and all_cores_blank and rel_new_data.has_key(rel_opts.pk.name) and rel_new_data[rel_opts.pk.name][0]:
|
||
|
|
new_rel_obj.delete()
|
||
|
|
self.fields_deleted.append('%s "%r"' % (rel_opts.verbose_name, old_rel_obj))
|
||
|
|
|
||
|
|
# Save the order, if applicable.
|
||
|
|
if change and opts.get_ordered_objects():
|
||
|
|
order = new_data['order_'] and map(int, new_data['order_'].split(',')) or []
|
||
|
|
for rel_opts in opts.get_ordered_objects():
|
||
|
|
getattr(new_object, 'set_%s_order' % rel_opts.object_name.lower())(order)
|
||
|
|
return new_object
|
||
|
|
|
||
|
|
def manipulator_validator_unique(f, opts, self, field_data, all_data):
|
||
|
|
"Validates that the value is unique for this field."
|
||
|
|
try:
|
||
|
|
old_obj = opts.get_model_module().get_object(**{'%s__exact' % f.name: field_data})
|
||
|
|
except ObjectDoesNotExist:
|
||
|
|
return
|
||
|
|
if hasattr(self, 'original_object') and getattr(self.original_object, opts.pk.name) == getattr(old_obj, opts.pk.name):
|
||
|
|
return
|
||
|
|
raise validators.ValidationError, "%s with this %s already exists." % (capfirst(opts.verbose_name), f.verbose_name)
|
||
|
|
|
||
|
|
def manipulator_validator_unique_together(field_name_list, opts, self, field_data, all_data):
|
||
|
|
from django.utils.text import get_text_list
|
||
|
|
field_list = [opts.get_field(field_name) for field_name in field_name_list]
|
||
|
|
kwargs = {'%s__iexact' % field_name_list[0]: field_data}
|
||
|
|
for f in field_list[1:]:
|
||
|
|
field_val = all_data.get(f.name, None)
|
||
|
|
if field_val is None:
|
||
|
|
# This will be caught by another validator, assuming the field
|
||
|
|
# doesn't have blank=True.
|
||
|
|
return
|
||
|
|
kwargs['%s__iexact' % f.name] = field_val
|
||
|
|
mod = opts.get_model_module()
|
||
|
|
try:
|
||
|
|
old_obj = mod.get_object(**kwargs)
|
||
|
|
except ObjectDoesNotExist:
|
||
|
|
return
|
||
|
|
if hasattr(self, 'original_object') and getattr(self.original_object, opts.pk.name) == getattr(old_obj, opts.pk.name):
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
raise validators.ValidationError, "%s with this %s already exists for the given %s." % \
|
||
|
|
(capfirst(opts.verbose_name), field_list[0].verbose_name, get_text_list(field_name_list[1:], 'and'))
|
||
|
|
|
||
|
|
def manipulator_validator_unique_for_date(from_field, date_field, opts, lookup_type, self, field_data, all_data):
|
||
|
|
date_str = all_data.get(date_field.get_manipulator_field_names('')[0], None)
|
||
|
|
mod = opts.get_model_module()
|
||
|
|
date_val = formfields.DateField.html2python(date_str)
|
||
|
|
if date_val is None:
|
||
|
|
return # Date was invalid. This will be caught by another validator.
|
||
|
|
lookup_kwargs = {'%s__iexact' % from_field.name: field_data, '%s__year' % date_field.name: date_val.year}
|
||
|
|
if lookup_type in ('month', 'date'):
|
||
|
|
lookup_kwargs['%s__month' % date_field.name] = date_val.month
|
||
|
|
if lookup_type == 'date':
|
||
|
|
lookup_kwargs['%s__day' % date_field.name] = date_val.day
|
||
|
|
try:
|
||
|
|
old_obj = mod.get_object(**lookup_kwargs)
|
||
|
|
except ObjectDoesNotExist:
|
||
|
|
return
|
||
|
|
else:
|
||
|
|
if hasattr(self, 'original_object') and getattr(self.original_object, opts.pk.name) == getattr(old_obj, opts.pk.name):
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
format_string = (lookup_type == 'date') and '%B %d, %Y' or '%B %Y'
|
||
|
|
raise validators.ValidationError, "Please enter a different %s. The one you entered is already being used for %s." % \
|
||
|
|
(from_field.verbose_name, date_val.strftime(format_string))
|
||
|
|
|
||
|
|
def manipulator_valid_rel_key(f, self, field_data, all_data):
|
||
|
|
"Validates that the value is a valid foreign key"
|
||
|
|
mod = f.rel.to.get_model_module()
|
||
|
|
try:
|
||
|
|
mod.get_object(**{'id__iexact': field_data})
|
||
|
|
except ObjectDoesNotExist:
|
||
|
|
raise validators.ValidationError, "Please enter a valid %s." % f.verbose_name
|
||
|
|
|
||
|
|
####################
|
||
|
|
# FIELDS #
|
||
|
|
####################
|
||
|
|
|
||
|
|
class Field(object):
|
||
|
|
|
||
|
|
# Designates whether empty strings fundamentally are allowed at the
|
||
|
|
# database level.
|
||
|
|
empty_strings_allowed = True
|
||
|
|
|
||
|
|
def __init__(self, name, verbose_name, primary_key=False,
|
||
|
|
maxlength=None, unique=False, blank=False, null=False, db_index=None,
|
||
|
|
core=False, rel=None, default=NOT_PROVIDED, editable=True,
|
||
|
|
prepopulate_from=None, unique_for_date=None, unique_for_month=None,
|
||
|
|
unique_for_year=None, validator_list=None, choices=None, radio_admin=None,
|
||
|
|
help_text=''):
|
||
|
|
self.name, self.verbose_name = name, verbose_name
|
||
|
|
self.primary_key = primary_key
|
||
|
|
self.maxlength, self.unique = maxlength, unique
|
||
|
|
self.blank, self.null = blank, null
|
||
|
|
self.core, self.rel, self.default = core, rel, default
|
||
|
|
self.editable = editable
|
||
|
|
self.validator_list = validator_list or []
|
||
|
|
self.prepopulate_from = prepopulate_from
|
||
|
|
self.unique_for_date, self.unique_for_month = unique_for_date, unique_for_month
|
||
|
|
self.unique_for_year = unique_for_year
|
||
|
|
self.choices = choices or []
|
||
|
|
self.radio_admin = radio_admin
|
||
|
|
self.help_text = help_text
|
||
|
|
if rel and isinstance(rel, ManyToMany):
|
||
|
|
self.help_text += ' Hold down "Control", or "Command" on a Mac, to select more than one.'
|
||
|
|
|
||
|
|
# Set db_index to True if the field has a relationship and doesn't explicitly set db_index.
|
||
|
|
if db_index is None:
|
||
|
|
if isinstance(rel, OneToOne) or isinstance(rel, ManyToOne):
|
||
|
|
self.db_index = True
|
||
|
|
else:
|
||
|
|
self.db_index = False
|
||
|
|
else:
|
||
|
|
self.db_index = db_index
|
||
|
|
|
||
|
|
def pre_save(self, obj, value, add):
|
||
|
|
"""
|
||
|
|
Hook for altering the object obj based on the value of this field and
|
||
|
|
and on the add/change status.
|
||
|
|
"""
|
||
|
|
pass
|
||
|
|
|
||
|
|
def get_db_prep_save(self, value, add):
|
||
|
|
"Returns field's value prepared for saving into a database."
|
||
|
|
return value
|
||
|
|
|
||
|
|
def get_db_prep_lookup(self, lookup_type, value):
|
||
|
|
"Returns field's value prepared for database lookup."
|
||
|
|
if lookup_type in ('exact', 'gt', 'gte', 'lt', 'lte', 'ne', 'month', 'day'):
|
||
|
|
return [value]
|
||
|
|
elif lookup_type == 'range':
|
||
|
|
return value
|
||
|
|
elif lookup_type == 'year':
|
||
|
|
return ['%s-01-01' % value, '%s-12-31' % value]
|
||
|
|
elif lookup_type in ('contains', 'icontains'):
|
||
|
|
return ["%%%s%%" % prep_for_like_query(value)]
|
||
|
|
elif lookup_type == 'iexact':
|
||
|
|
return [prep_for_like_query(value)]
|
||
|
|
elif lookup_type == 'startswith':
|
||
|
|
return ["%s%%" % prep_for_like_query(value)]
|
||
|
|
elif lookup_type == 'endswith':
|
||
|
|
return ["%%%s" % prep_for_like_query(value)]
|
||
|
|
elif lookup_type == 'isnull':
|
||
|
|
return []
|
||
|
|
raise TypeError, "Field has invalid lookup: %s" % lookup_type
|
||
|
|
|
||
|
|
def get_m2m_db_table(self, original_opts):
|
||
|
|
"Returns the name of the DB table for this field's relationship."
|
||
|
|
return '%s_%s' % (original_opts.db_table, self.name)
|
||
|
|
|
||
|
|
def has_default(self):
|
||
|
|
"Returns a boolean of whether this field has a default value."
|
||
|
|
return self.default != NOT_PROVIDED
|
||
|
|
|
||
|
|
def get_default(self):
|
||
|
|
"Returns the default value for this field."
|
||
|
|
if self.default != NOT_PROVIDED:
|
||
|
|
if hasattr(self.default, '__get_value__'):
|
||
|
|
return self.default.__get_value__()
|
||
|
|
return self.default
|
||
|
|
if self.null:
|
||
|
|
return None
|
||
|
|
return ""
|
||
|
|
|
||
|
|
def get_manipulator_field_names(self, name_prefix):
|
||
|
|
"""
|
||
|
|
Returns a list of field names that this object adds to the manipulator.
|
||
|
|
"""
|
||
|
|
return [name_prefix + self.name]
|
||
|
|
|
||
|
|
def get_manipulator_fields(self, opts, manipulator, change, name_prefix='', rel=False):
|
||
|
|
"""
|
||
|
|
Returns a list of formfields.FormField instances for this field. It
|
||
|
|
calculates the choices at runtime, not at compile time.
|
||
|
|
|
||
|
|
name_prefix is a prefix to prepend to the "field_name" argument.
|
||
|
|
rel is a boolean specifying whether this field is in a related context.
|
||
|
|
"""
|
||
|
|
params = {'validator_list': self.validator_list[:]}
|
||
|
|
if self.maxlength and not self.choices: # Don't give SelectFields a maxlength parameter.
|
||
|
|
params['maxlength'] = self.maxlength
|
||
|
|
if isinstance(self.rel, ManyToOne):
|
||
|
|
if self.rel.raw_id_admin:
|
||
|
|
field_objs = self.get_manipulator_field_objs()
|
||
|
|
params['validator_list'].append(curry(manipulator_valid_rel_key, self, manipulator))
|
||
|
|
else:
|
||
|
|
if self.radio_admin:
|
||
|
|
field_objs = [formfields.RadioSelectField]
|
||
|
|
params['choices'] = self.get_choices(include_blank=self.blank, blank_choice=BLANK_CHOICE_NONE)
|
||
|
|
params['ul_class'] = get_ul_class(self.radio_admin)
|
||
|
|
else:
|
||
|
|
if self.null:
|
||
|
|
field_objs = [formfields.NullSelectField]
|
||
|
|
else:
|
||
|
|
field_objs = [formfields.SelectField]
|
||
|
|
params['choices'] = self.get_choices()
|
||
|
|
elif self.choices:
|
||
|
|
if self.radio_admin:
|
||
|
|
field_objs = [formfields.RadioSelectField]
|
||
|
|
params['choices'] = self.get_choices(include_blank=self.blank, blank_choice=BLANK_CHOICE_NONE)
|
||
|
|
params['ul_class'] = get_ul_class(self.radio_admin)
|
||
|
|
else:
|
||
|
|
field_objs = [formfields.SelectField]
|
||
|
|
params['choices'] = self.get_choices()
|
||
|
|
else:
|
||
|
|
field_objs = self.get_manipulator_field_objs()
|
||
|
|
|
||
|
|
# Add the "unique" validator(s).
|
||
|
|
for field_name_list in opts.unique_together:
|
||
|
|
if field_name_list[0] == self.name:
|
||
|
|
params['validator_list'].append(getattr(manipulator, 'isUnique%s' % '_'.join(field_name_list)))
|
||
|
|
|
||
|
|
# Add the "unique for..." validator(s).
|
||
|
|
if self.unique_for_date:
|
||
|
|
params['validator_list'].append(getattr(manipulator, 'isUnique%sFor%s' % (self.name, self.unique_for_date)))
|
||
|
|
if self.unique_for_month:
|
||
|
|
params['validator_list'].append(getattr(manipulator, 'isUnique%sFor%s' % (self.name, self.unique_for_month)))
|
||
|
|
if self.unique_for_year:
|
||
|
|
params['validator_list'].append(getattr(manipulator, 'isUnique%sFor%s' % (self.name, self.unique_for_year)))
|
||
|
|
if self.unique:
|
||
|
|
params['validator_list'].append(curry(manipulator_validator_unique, self, opts, manipulator))
|
||
|
|
|
||
|
|
# Only add is_required=True if the field cannot be blank. Primary keys
|
||
|
|
# are a special case, and fields in a related context should set this
|
||
|
|
# as False, because they'll be caught by a separate validator --
|
||
|
|
# RequiredIfOtherFieldGiven.
|
||
|
|
params['is_required'] = not self.blank and not self.primary_key and not rel
|
||
|
|
|
||
|
|
# If this field is in a related context, check whether any other fields
|
||
|
|
# in the related object have core=True. If so, add a validator --
|
||
|
|
# RequiredIfOtherFieldsGiven -- to this FormField.
|
||
|
|
if rel and not self.blank and not isinstance(self, AutoField) and not isinstance(self, FileField):
|
||
|
|
# First, get the core fields, if any.
|
||
|
|
core_field_names = []
|
||
|
|
for f in opts.fields:
|
||
|
|
if f.core and f != self:
|
||
|
|
core_field_names.extend(f.get_manipulator_field_names(name_prefix))
|
||
|
|
# Now, if there are any, add the validator to this FormField.
|
||
|
|
if core_field_names:
|
||
|
|
params['validator_list'].append(validators.RequiredIfOtherFieldsGiven(core_field_names, "This field is required."))
|
||
|
|
|
||
|
|
# BooleanFields (CheckboxFields) are a special case. They don't take
|
||
|
|
# is_required or validator_list.
|
||
|
|
if isinstance(self, BooleanField):
|
||
|
|
del params['validator_list'], params['is_required']
|
||
|
|
|
||
|
|
# Finally, add the field_names.
|
||
|
|
field_names = self.get_manipulator_field_names(name_prefix)
|
||
|
|
return [man(field_name=field_names[i], **params) for i, man in enumerate(field_objs)]
|
||
|
|
|
||
|
|
def get_manipulator_new_data(self, new_data, rel=False):
|
||
|
|
"""
|
||
|
|
Given the full new_data dictionary (from the manipulator), returns this
|
||
|
|
field's data.
|
||
|
|
"""
|
||
|
|
if rel:
|
||
|
|
return new_data.get(self.name, [self.get_default()])[0]
|
||
|
|
else:
|
||
|
|
val = new_data.get(self.name, self.get_default())
|
||
|
|
if not self.empty_strings_allowed and val == '' and self.null:
|
||
|
|
val = None
|
||
|
|
return val
|
||
|
|
|
||
|
|
def get_choices(self, include_blank=True, blank_choice=BLANK_CHOICE_DASH):
|
||
|
|
"Returns a list of tuples used as SelectField choices for this field."
|
||
|
|
first_choice = include_blank and blank_choice or []
|
||
|
|
if self.choices:
|
||
|
|
return first_choice + list(self.choices)
|
||
|
|
rel_obj = self.rel.to
|
||
|
|
return first_choice + [(getattr(x, rel_obj.pk.name), repr(x)) for x in rel_obj.get_model_module().get_list(**self.rel.limit_choices_to)]
|
||
|
|
|
||
|
|
class AutoField(Field):
|
||
|
|
empty_strings_allowed = False
|
||
|
|
def get_manipulator_fields(self, opts, manipulator, change, name_prefix='', rel=False):
|
||
|
|
if not rel:
|
||
|
|
return [] # Don't add a FormField unless it's in a related context.
|
||
|
|
return Field.get_manipulator_fields(self, opts, manipulator, change, name_prefix, rel)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.HiddenField]
|
||
|
|
|
||
|
|
def get_manipulator_new_data(self, new_data, rel=False):
|
||
|
|
if not rel:
|
||
|
|
return None
|
||
|
|
return Field.get_manipulator_new_data(self, new_data, rel)
|
||
|
|
|
||
|
|
class BooleanField(Field):
|
||
|
|
def __init__(self, name, verbose_name, **kwargs):
|
||
|
|
kwargs['blank'] = True
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.CheckboxField]
|
||
|
|
|
||
|
|
class CharField(Field):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.TextField]
|
||
|
|
|
||
|
|
class CommaSeparatedIntegerField(CharField):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.CommaSeparatedIntegerField]
|
||
|
|
|
||
|
|
class DateField(Field):
|
||
|
|
empty_strings_allowed = False
|
||
|
|
def __init__(self, name, verbose_name, auto_now=False, auto_now_add=False, **kwargs):
|
||
|
|
self.auto_now, self.auto_now_add = auto_now, auto_now_add
|
||
|
|
if auto_now or auto_now_add:
|
||
|
|
kwargs['editable'] = False
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_db_prep_lookup(self, lookup_type, value):
|
||
|
|
if lookup_type == 'range':
|
||
|
|
value = [str(v) for v in value]
|
||
|
|
else:
|
||
|
|
value = str(value)
|
||
|
|
return Field.get_db_prep_lookup(self, lookup_type, value)
|
||
|
|
|
||
|
|
def pre_save(self, obj, value, add):
|
||
|
|
if self.auto_now or (self.auto_now_add and add):
|
||
|
|
setattr(obj, self.name, datetime.datetime.now())
|
||
|
|
|
||
|
|
def get_db_prep_save(self, value, add):
|
||
|
|
# Casts dates into string format for entry into database.
|
||
|
|
if value is not None:
|
||
|
|
value = value.strftime('%Y-%m-%d')
|
||
|
|
return Field.get_db_prep_save(self, value, add)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.DateField]
|
||
|
|
|
||
|
|
class DateTimeField(DateField):
|
||
|
|
def get_db_prep_save(self, value, add):
|
||
|
|
# Casts dates into string format for entry into database.
|
||
|
|
if value is not None:
|
||
|
|
value = value.strftime('%Y-%m-%d %H:%M:%S')
|
||
|
|
return Field.get_db_prep_save(self, value, add)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.DateField, formfields.TimeField]
|
||
|
|
|
||
|
|
def get_manipulator_field_names(self, name_prefix):
|
||
|
|
return [name_prefix + self.name + '_date', name_prefix + self.name + '_time']
|
||
|
|
|
||
|
|
def get_manipulator_new_data(self, new_data, rel=False):
|
||
|
|
date_field, time_field = self.get_manipulator_field_names('')
|
||
|
|
if rel:
|
||
|
|
d = new_data.get(date_field, [None])[0]
|
||
|
|
t = new_data.get(time_field, [None])[0]
|
||
|
|
else:
|
||
|
|
d = new_data.get(date_field, None)
|
||
|
|
t = new_data.get(time_field, None)
|
||
|
|
if d is not None and t is not None:
|
||
|
|
return datetime.datetime.combine(d, t)
|
||
|
|
return self.get_default()
|
||
|
|
|
||
|
|
class EmailField(Field):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.EmailField]
|
||
|
|
|
||
|
|
class FileField(Field):
|
||
|
|
def __init__(self, name, verbose_name, upload_to='', **kwargs):
|
||
|
|
self.upload_to = upload_to
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_fields(self, opts, manipulator, change, name_prefix='', rel=False):
|
||
|
|
field_list = Field.get_manipulator_fields(self, opts, manipulator, change, name_prefix, rel)
|
||
|
|
|
||
|
|
if not self.blank:
|
||
|
|
if rel:
|
||
|
|
# This validator makes sure FileFields work in a related context.
|
||
|
|
class RequiredFileField:
|
||
|
|
def __init__(self, other_field_names, other_file_field_name):
|
||
|
|
self.other_field_names = other_field_names
|
||
|
|
self.other_file_field_name = other_file_field_name
|
||
|
|
self.always_test = True
|
||
|
|
def __call__(self, field_data, all_data):
|
||
|
|
if not all_data.get(self.other_file_field_name, False):
|
||
|
|
c = validators.RequiredIfOtherFieldsGiven(self.other_field_names, "This field is required.")
|
||
|
|
c(field_data, all_data)
|
||
|
|
# First, get the core fields, if any.
|
||
|
|
core_field_names = []
|
||
|
|
for f in opts.fields:
|
||
|
|
if f.core and f != self:
|
||
|
|
core_field_names.extend(f.get_manipulator_field_names(name_prefix))
|
||
|
|
# Now, if there are any, add the validator to this FormField.
|
||
|
|
if core_field_names:
|
||
|
|
field_list[0].validator_list.append(RequiredFileField(core_field_names, field_list[1].field_name))
|
||
|
|
else:
|
||
|
|
v = validators.RequiredIfOtherFieldNotGiven(field_list[1].field_name, "This field is required.")
|
||
|
|
v.always_test = True
|
||
|
|
field_list[0].validator_list.append(v)
|
||
|
|
field_list[0].is_required = field_list[1].is_required = False
|
||
|
|
|
||
|
|
# If the raw path is passed in, validate it's under the MEDIA_ROOT.
|
||
|
|
def isWithinMediaRoot(field_data, all_data):
|
||
|
|
f = os.path.abspath(os.path.join(settings.MEDIA_ROOT, field_data))
|
||
|
|
if not f.startswith(os.path.normpath(settings.MEDIA_ROOT)):
|
||
|
|
raise validators.ValidationError, "Enter a valid filename."
|
||
|
|
field_list[1].validator_list.append(isWithinMediaRoot)
|
||
|
|
return field_list
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.FileUploadField, formfields.HiddenField]
|
||
|
|
|
||
|
|
def get_manipulator_field_names(self, name_prefix):
|
||
|
|
return [name_prefix + self.name + '_file', name_prefix + self.name]
|
||
|
|
|
||
|
|
def save_file(self, new_data, new_object, original_object, change, rel):
|
||
|
|
upload_field_name = self.get_manipulator_field_names('')[0]
|
||
|
|
if new_data.get(upload_field_name, False):
|
||
|
|
if rel:
|
||
|
|
getattr(new_object, 'save_%s_file' % self.name)(new_data[upload_field_name][0]["filename"], new_data[upload_field_name][0]["content"])
|
||
|
|
else:
|
||
|
|
getattr(new_object, 'save_%s_file' % self.name)(new_data[upload_field_name]["filename"], new_data[upload_field_name]["content"])
|
||
|
|
|
||
|
|
def get_directory_name(self):
|
||
|
|
return os.path.normpath(datetime.datetime.now().strftime(self.upload_to))
|
||
|
|
|
||
|
|
def get_filename(self, filename):
|
||
|
|
from django.utils.text import get_valid_filename
|
||
|
|
f = os.path.join(self.get_directory_name(), get_valid_filename(os.path.basename(filename)))
|
||
|
|
return os.path.normpath(f)
|
||
|
|
|
||
|
|
class FloatField(Field):
|
||
|
|
empty_strings_allowed = False
|
||
|
|
def __init__(self, name, verbose_name, max_digits, decimal_places, **kwargs):
|
||
|
|
self.max_digits, self.decimal_places = max_digits, decimal_places
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [curry(formfields.FloatField, max_digits=self.max_digits, decimal_places=self.decimal_places)]
|
||
|
|
|
||
|
|
class ImageField(FileField):
|
||
|
|
def __init__(self, name, verbose_name, width_field=None, height_field=None, **kwargs):
|
||
|
|
self.width_field, self.height_field = width_field, height_field
|
||
|
|
FileField.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.ImageUploadField, formfields.HiddenField]
|
||
|
|
|
||
|
|
def save_file(self, new_data, new_object, original_object, change, rel):
|
||
|
|
FileField.save_file(self, new_data, new_object, original_object, change, rel)
|
||
|
|
# If the image has height and/or width field(s) and they haven't
|
||
|
|
# changed, set the width and/or height field(s) back to their original
|
||
|
|
# values.
|
||
|
|
if change and (self.width_field or self.height_field):
|
||
|
|
if self.width_field:
|
||
|
|
setattr(new_object, self.width_field, getattr(original_object, self.width_field))
|
||
|
|
if self.height_field:
|
||
|
|
setattr(new_object, self.height_field, getattr(original_object, self.height_field))
|
||
|
|
new_object.save()
|
||
|
|
|
||
|
|
class IntegerField(Field):
|
||
|
|
empty_strings_allowed = False
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.IntegerField]
|
||
|
|
|
||
|
|
class IPAddressField(Field):
|
||
|
|
def __init__(self, name, verbose_name, **kwargs):
|
||
|
|
kwargs['maxlength'] = 15
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.IPAddressField]
|
||
|
|
|
||
|
|
class NullBooleanField(Field):
|
||
|
|
def __init__(self, name, verbose_name, **kwargs):
|
||
|
|
kwargs['null'] = True
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.NullBooleanField]
|
||
|
|
|
||
|
|
class PhoneNumberField(IntegerField):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.PhoneNumberField]
|
||
|
|
|
||
|
|
class PositiveIntegerField(IntegerField):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.PositiveIntegerField]
|
||
|
|
|
||
|
|
class PositiveSmallIntegerField(IntegerField):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.PositiveSmallIntegerField]
|
||
|
|
|
||
|
|
class SlugField(Field):
|
||
|
|
def __init__(self, name, verbose_name, **kwargs):
|
||
|
|
kwargs['maxlength'] = 50
|
||
|
|
kwargs.setdefault('validator_list', []).append(validators.isAlphaNumeric)
|
||
|
|
# Set db_index=True unless it's been set manually.
|
||
|
|
if not kwargs.has_key('db_index'):
|
||
|
|
kwargs['db_index'] = True
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.TextField]
|
||
|
|
|
||
|
|
class SmallIntegerField(IntegerField):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.SmallIntegerField]
|
||
|
|
|
||
|
|
class TextField(Field):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.LargeTextField]
|
||
|
|
|
||
|
|
class TimeField(Field):
|
||
|
|
empty_strings_allowed = False
|
||
|
|
def __init__(self, name, verbose_name, auto_now=False, auto_now_add=False, **kwargs):
|
||
|
|
self.auto_now, self.auto_now_add = auto_now, auto_now_add
|
||
|
|
if auto_now or auto_now_add:
|
||
|
|
kwargs['editable'] = False
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_db_prep_lookup(self, lookup_type, value):
|
||
|
|
if lookup_type == 'range':
|
||
|
|
value = [str(v) for v in value]
|
||
|
|
else:
|
||
|
|
value = str(value)
|
||
|
|
return Field.get_db_prep_lookup(self, lookup_type, value)
|
||
|
|
|
||
|
|
def pre_save(self, obj, value, add):
|
||
|
|
if self.auto_now or (self.auto_now_add and add):
|
||
|
|
setattr(obj, self.name, datetime.datetime.now().time())
|
||
|
|
|
||
|
|
def get_db_prep_save(self, value, add):
|
||
|
|
# Casts dates into string format for entry into database.
|
||
|
|
if value is not None:
|
||
|
|
value = value.strftime('%H:%M:%S')
|
||
|
|
return Field.get_db_prep_save(self, value, add)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.TimeField]
|
||
|
|
|
||
|
|
class URLField(Field):
|
||
|
|
def __init__(self, name, verbose_name, verify_exists=True, **kwargs):
|
||
|
|
if verify_exists:
|
||
|
|
kwargs.setdefault('validator_list', []).append(validators.isExistingURL)
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.URLField]
|
||
|
|
|
||
|
|
class USStateField(Field):
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.USStateField]
|
||
|
|
|
||
|
|
class XMLField(Field):
|
||
|
|
def __init__(self, name, verbose_name, schema_path, **kwargs):
|
||
|
|
self.schema_path = schema_path
|
||
|
|
Field.__init__(self, name, verbose_name, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [curry(formfields.XMLLargeTextField, schema_path=self.schema_path)]
|
||
|
|
|
||
|
|
class ForeignKey(Field):
|
||
|
|
empty_strings_allowed = False
|
||
|
|
def __init__(self, to, to_field=None, rel_name=None, **kwargs):
|
||
|
|
try:
|
||
|
|
to_name = to._meta.object_name.lower()
|
||
|
|
except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
|
||
|
|
kwargs['name'] = kwargs['name']
|
||
|
|
kwargs['verbose_name'] = kwargs['verbose_name']
|
||
|
|
else:
|
||
|
|
to_field = to_field or to._meta.pk.name
|
||
|
|
kwargs['name'] = kwargs.get('name', to_name + '_id')
|
||
|
|
kwargs['verbose_name'] = kwargs.get('verbose_name', to._meta.verbose_name)
|
||
|
|
rel_name = rel_name or to_name
|
||
|
|
kwargs['rel'] = ManyToOne(to, rel_name, to_field,
|
||
|
|
num_in_admin=kwargs.pop('num_in_admin', 0),
|
||
|
|
min_num_in_admin=kwargs.pop('min_num_in_admin', None),
|
||
|
|
max_num_in_admin=kwargs.pop('max_num_in_admin', None),
|
||
|
|
num_extra_on_change=kwargs.pop('num_extra_on_change', 1),
|
||
|
|
edit_inline=kwargs.pop('edit_inline', False),
|
||
|
|
edit_inline_type=kwargs.pop('edit_inline_type', STACKED),
|
||
|
|
related_name=kwargs.pop('related_name', None),
|
||
|
|
limit_choices_to=kwargs.pop('limit_choices_to', None),
|
||
|
|
lookup_overrides=kwargs.pop('lookup_overrides', None),
|
||
|
|
raw_id_admin=kwargs.pop('raw_id_admin', False))
|
||
|
|
Field.__init__(self, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
return [formfields.IntegerField]
|
||
|
|
|
||
|
|
class ManyToManyField(Field):
|
||
|
|
def __init__(self, to, **kwargs):
|
||
|
|
kwargs['name'] = kwargs.get('name', to._meta.module_name)
|
||
|
|
kwargs['verbose_name'] = kwargs.get('verbose_name', to._meta.verbose_name_plural)
|
||
|
|
kwargs['rel'] = ManyToMany(to, to._meta.object_name.lower() + '_id',
|
||
|
|
num_in_admin=kwargs.pop('num_in_admin', 0),
|
||
|
|
related_name=kwargs.pop('related_name', None),
|
||
|
|
filter_interface=kwargs.pop('filter_interface', None),
|
||
|
|
get_choices_from=kwargs.pop('get_choices_from', None),
|
||
|
|
limit_choices_to=kwargs.pop('limit_choices_to', None))
|
||
|
|
Field.__init__(self, **kwargs)
|
||
|
|
|
||
|
|
def get_manipulator_field_objs(self):
|
||
|
|
choices = self.get_choices(include_blank=False)
|
||
|
|
return [curry(formfields.SelectMultipleField, size=min(max(len(choices), 5), 15), choices=choices)]
|
||
|
|
|
||
|
|
####################
|
||
|
|
# RELATIONSHIPS #
|
||
|
|
####################
|
||
|
|
|
||
|
|
class ManyToOne:
|
||
|
|
def __init__(self, to, name, field_name, num_in_admin=0, min_num_in_admin=None,
|
||
|
|
max_num_in_admin=None, num_extra_on_change=1, edit_inline=False, edit_inline_type=STACKED,
|
||
|
|
related_name=None, limit_choices_to=None, lookup_overrides=None, raw_id_admin=False):
|
||
|
|
try:
|
||
|
|
self.to = to._meta
|
||
|
|
except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT
|
||
|
|
assert to == RECURSIVE_RELATIONSHIP_CONSTANT, "'to' must be either a model or the string '%s'" % RECURSIVE_RELATIONSHIP_CONSTANT
|
||
|
|
self.to = to
|
||
|
|
self.name, self.field_name = name, field_name
|
||
|
|
self.num_in_admin, self.edit_inline = num_in_admin, edit_inline
|
||
|
|
self.min_num_in_admin, self.max_num_in_admin = min_num_in_admin, max_num_in_admin
|
||
|
|
self.num_extra_on_change = num_extra_on_change
|
||
|
|
self.edit_inline_type, self.related_name = edit_inline_type, related_name
|
||
|
|
self.limit_choices_to = limit_choices_to or {}
|
||
|
|
self.lookup_overrides = lookup_overrides or {}
|
||
|
|
self.raw_id_admin = raw_id_admin
|
||
|
|
|
||
|
|
def get_cache_name(self):
|
||
|
|
return '_%s_cache' % self.name
|
||
|
|
|
||
|
|
def get_related_field(self):
|
||
|
|
"Returns the Field in the 'to' object to which this relationship is tied."
|
||
|
|
return self.to.get_field(self.field_name)
|
||
|
|
|
||
|
|
class ManyToMany:
|
||
|
|
def __init__(self, to, name, num_in_admin=0, related_name=None,
|
||
|
|
filter_interface=None, get_choices_from=None, limit_choices_to=None):
|
||
|
|
self.to, self.name = to._meta, name
|
||
|
|
self.num_in_admin = num_in_admin
|
||
|
|
self.related_name = related_name
|
||
|
|
self.filter_interface, self.get_choices_from = filter_interface, get_choices_from
|
||
|
|
self.limit_choices_to = limit_choices_to or {}
|
||
|
|
self.edit_inline = False
|
||
|
|
|
||
|
|
class OneToOne(ManyToOne):
|
||
|
|
def __init__(self, to, name, field_name, num_in_admin=0, edit_inline=False,
|
||
|
|
edit_inline_type=STACKED, related_name=None, limit_choices_to=None, lookup_overrides=None,
|
||
|
|
raw_id_admin=False):
|
||
|
|
self.to, self.name, self.field_name = to._meta, name, field_name
|
||
|
|
self.num_in_admin, self.edit_inline = num_in_admin, edit_inline
|
||
|
|
self.edit_inline_type, self.related_name = edit_inline_type, related_name
|
||
|
|
self.limit_choices_to = limit_choices_to or {}
|
||
|
|
self.lookup_overrides = lookup_overrides or {}
|
||
|
|
self.raw_id_admin = raw_id_admin
|
||
|
|
|
||
|
|
class Admin:
|
||
|
|
def __init__(self, fields, js=None, list_display=None, list_filter=None, date_hierarchy=None,
|
||
|
|
save_as=False, ordering=None, search_fields=None, save_on_top=False):
|
||
|
|
self.fields = fields
|
||
|
|
self.js = js or []
|
||
|
|
self.list_display = list_display or ['__repr__']
|
||
|
|
self.list_filter = list_filter or []
|
||
|
|
self.date_hierarchy = date_hierarchy
|
||
|
|
self.save_as, self.ordering = save_as, ordering
|
||
|
|
self.search_fields = search_fields or []
|
||
|
|
self.save_on_top = save_on_top
|
||
|
|
|
||
|
|
def copy(self):
|
||
|
|
return copy.deepcopy(self)
|