296 lines
12 KiB
Python
296 lines
12 KiB
Python
from django.conf import settings
|
|
from django.db.models.related import RelatedObject
|
|
from django.db.models.fields.related import ManyToManyRel
|
|
from django.db.models.fields import AutoField, FieldDoesNotExist
|
|
from django.db.models.loading import get_models
|
|
from django.db.models.query import orderlist2sql
|
|
from django.db.models import Manager
|
|
from django.utils.translation import activate, deactivate_all, get_language, string_concat
|
|
from django.utils.encoding import force_unicode, smart_str
|
|
from bisect import bisect
|
|
import re
|
|
|
|
# Calculate the verbose_name by converting from InitialCaps to "lowercase with spaces".
|
|
get_verbose_name = lambda class_name: re.sub('(((?<=[a-z])[A-Z])|([A-Z](?![A-Z]|$)))', ' \\1', class_name).lower().strip()
|
|
|
|
DEFAULT_NAMES = ('verbose_name', 'db_table', 'ordering',
|
|
'unique_together', 'permissions', 'get_latest_by',
|
|
'order_with_respect_to', 'app_label', 'db_tablespace')
|
|
|
|
class Options(object):
|
|
def __init__(self, meta):
|
|
self.fields, self.many_to_many = [], []
|
|
self.module_name, self.verbose_name = None, None
|
|
self.verbose_name_plural = None
|
|
self.db_table = ''
|
|
self.ordering = []
|
|
self.unique_together = []
|
|
self.permissions = []
|
|
self.object_name, self.app_label = None, None
|
|
self.get_latest_by = None
|
|
self.order_with_respect_to = None
|
|
self.db_tablespace = None
|
|
self.admin = None
|
|
self.meta = meta
|
|
self.pk = None
|
|
self.has_auto_field = False
|
|
self.one_to_one_field = None
|
|
self.parents = []
|
|
|
|
def contribute_to_class(self, cls, name):
|
|
cls._meta = self
|
|
self.installed = re.sub('\.models$', '', cls.__module__) in settings.INSTALLED_APPS
|
|
# First, construct the default values for these options.
|
|
self.object_name = cls.__name__
|
|
self.module_name = self.object_name.lower()
|
|
self.verbose_name = get_verbose_name(self.object_name)
|
|
|
|
# Next, apply any overridden values from 'class Meta'.
|
|
if self.meta:
|
|
meta_attrs = self.meta.__dict__
|
|
del meta_attrs['__module__']
|
|
del meta_attrs['__doc__']
|
|
for attr_name in DEFAULT_NAMES:
|
|
setattr(self, attr_name, meta_attrs.pop(attr_name, getattr(self, attr_name)))
|
|
# verbose_name_plural is a special case because it uses a 's'
|
|
# by default.
|
|
setattr(self, 'verbose_name_plural', meta_attrs.pop('verbose_name_plural', string_concat(self.verbose_name, 's')))
|
|
# Any leftover attributes must be invalid.
|
|
if meta_attrs != {}:
|
|
raise TypeError, "'class Meta' got invalid attribute(s): %s" % ','.join(meta_attrs.keys())
|
|
else:
|
|
self.verbose_name_plural = string_concat(self.verbose_name, 's')
|
|
del self.meta
|
|
|
|
def _prepare(self, model):
|
|
from django.db import backend
|
|
from django.db.backends.util import truncate_name
|
|
if self.order_with_respect_to:
|
|
self.order_with_respect_to = self.get_field(self.order_with_respect_to)
|
|
self.ordering = ('_order',)
|
|
else:
|
|
self.order_with_respect_to = None
|
|
|
|
if self.pk is None:
|
|
auto = AutoField(verbose_name='ID', primary_key=True)
|
|
auto.creation_counter = -1
|
|
model.add_to_class('id', auto)
|
|
|
|
# If the db_table wasn't provided, use the app_label + module_name.
|
|
if not self.db_table:
|
|
self.db_table = "%s_%s" % (self.app_label, self.module_name)
|
|
self.db_table = truncate_name(self.db_table,
|
|
backend.get_max_name_length())
|
|
|
|
def add_field(self, field):
|
|
# Insert the given field in the order in which it was created, using
|
|
# the "creation_counter" attribute of the field.
|
|
# Move many-to-many related fields from self.fields into self.many_to_many.
|
|
if field.rel and isinstance(field.rel, ManyToManyRel):
|
|
self.many_to_many.insert(bisect(self.many_to_many, field), field)
|
|
else:
|
|
self.fields.insert(bisect(self.fields, field), field)
|
|
if not self.pk and field.primary_key:
|
|
self.pk = field
|
|
field.serialize = False
|
|
|
|
def __repr__(self):
|
|
return '<Options for %s>' % self.object_name
|
|
|
|
def __str__(self):
|
|
return "%s.%s" % (smart_str(self.app_label), smart_str(self.module_name))
|
|
|
|
def verbose_name_raw(self):
|
|
"""
|
|
There are a few places where the untranslated verbose name is needed
|
|
(so that we get the same value regardless of currently active
|
|
locale).
|
|
"""
|
|
lang = get_language()
|
|
deactivate_all()
|
|
raw = force_unicode(self.verbose_name)
|
|
activate(lang)
|
|
return raw
|
|
verbose_name_raw = property(verbose_name_raw)
|
|
|
|
def get_field(self, name, many_to_many=True):
|
|
"Returns the requested field by name. Raises FieldDoesNotExist on error."
|
|
to_search = many_to_many and (self.fields + self.many_to_many) or self.fields
|
|
for f in to_search:
|
|
if f.name == name:
|
|
return f
|
|
raise FieldDoesNotExist, '%s has no field named %r' % (self.object_name, name)
|
|
|
|
def get_order_sql(self, table_prefix=''):
|
|
"Returns the full 'ORDER BY' clause for this object, according to self.ordering."
|
|
if not self.ordering: return ''
|
|
pre = table_prefix and (table_prefix + '.') or ''
|
|
return 'ORDER BY ' + orderlist2sql(self.ordering, self, pre)
|
|
|
|
def get_add_permission(self):
|
|
return 'add_%s' % self.object_name.lower()
|
|
|
|
def get_change_permission(self):
|
|
return 'change_%s' % self.object_name.lower()
|
|
|
|
def get_delete_permission(self):
|
|
return 'delete_%s' % self.object_name.lower()
|
|
|
|
def get_all_related_objects(self):
|
|
try: # Try the cache first.
|
|
return self._all_related_objects
|
|
except AttributeError:
|
|
rel_objs = []
|
|
for klass in get_models():
|
|
for f in klass._meta.fields:
|
|
if f.rel and self == f.rel.to._meta:
|
|
rel_objs.append(RelatedObject(f.rel.to, klass, f))
|
|
self._all_related_objects = rel_objs
|
|
return rel_objs
|
|
|
|
def get_followed_related_objects(self, follow=None):
|
|
if follow == None:
|
|
follow = self.get_follow()
|
|
return [f for f in self.get_all_related_objects() if follow.get(f.name, None)]
|
|
|
|
def get_data_holders(self, follow=None):
|
|
if follow == None:
|
|
follow = self.get_follow()
|
|
return [f for f in self.fields + self.many_to_many + self.get_all_related_objects() if follow.get(f.name, None)]
|
|
|
|
def get_follow(self, override=None):
|
|
follow = {}
|
|
for f in self.fields + self.many_to_many + self.get_all_related_objects():
|
|
if override and f.name in override:
|
|
child_override = override[f.name]
|
|
else:
|
|
child_override = None
|
|
fol = f.get_follow(child_override)
|
|
if fol != None:
|
|
follow[f.name] = fol
|
|
return follow
|
|
|
|
def get_all_related_many_to_many_objects(self):
|
|
try: # Try the cache first.
|
|
return self._all_related_many_to_many_objects
|
|
except AttributeError:
|
|
rel_objs = []
|
|
for klass in get_models():
|
|
for f in klass._meta.many_to_many:
|
|
if f.rel and self == f.rel.to._meta:
|
|
rel_objs.append(RelatedObject(f.rel.to, klass, f))
|
|
self._all_related_many_to_many_objects = rel_objs
|
|
return rel_objs
|
|
|
|
def get_ordered_objects(self):
|
|
"Returns a list of Options objects that are ordered with respect to this object."
|
|
if not hasattr(self, '_ordered_objects'):
|
|
objects = []
|
|
# TODO
|
|
#for klass in get_models(get_app(self.app_label)):
|
|
# opts = klass._meta
|
|
# if opts.order_with_respect_to and opts.order_with_respect_to.rel \
|
|
# and self == opts.order_with_respect_to.rel.to._meta:
|
|
# objects.append(opts)
|
|
self._ordered_objects = objects
|
|
return self._ordered_objects
|
|
|
|
def has_field_type(self, field_type, follow=None):
|
|
"""
|
|
Returns True if this object's admin form has at least one of the given
|
|
field_type (e.g. FileField).
|
|
"""
|
|
# TODO: follow
|
|
if not hasattr(self, '_field_types'):
|
|
self._field_types = {}
|
|
if field_type not in self._field_types:
|
|
try:
|
|
# First check self.fields.
|
|
for f in self.fields:
|
|
if isinstance(f, field_type):
|
|
raise StopIteration
|
|
# Failing that, check related fields.
|
|
for related in self.get_followed_related_objects(follow):
|
|
for f in related.opts.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]
|
|
|
|
class AdminOptions(object):
|
|
def __init__(self, fields=None, js=None, list_display=None, list_display_links=None, list_filter=None,
|
|
date_hierarchy=None, save_as=False, ordering=None, search_fields=None,
|
|
save_on_top=False, list_select_related=False, manager=None, list_per_page=100):
|
|
self.fields = fields
|
|
self.js = js or []
|
|
self.list_display = list_display or ['__str__']
|
|
self.list_display_links = list_display_links or []
|
|
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
|
|
self.list_select_related = list_select_related
|
|
self.list_per_page = list_per_page
|
|
self.manager = manager or Manager()
|
|
|
|
def get_field_sets(self, opts):
|
|
"Returns a list of AdminFieldSet objects for this AdminOptions object."
|
|
if self.fields is None:
|
|
field_struct = ((None, {'fields': [f.name for f in opts.fields + opts.many_to_many if f.editable and not isinstance(f, AutoField)]}),)
|
|
else:
|
|
field_struct = self.fields
|
|
new_fieldset_list = []
|
|
for fieldset in field_struct:
|
|
fs_options = fieldset[1]
|
|
classes = fs_options.get('classes', ())
|
|
description = fs_options.get('description', '')
|
|
new_fieldset_list.append(AdminFieldSet(fieldset[0], classes,
|
|
opts.get_field, fs_options['fields'], description))
|
|
return new_fieldset_list
|
|
|
|
def contribute_to_class(self, cls, name):
|
|
cls._meta.admin = self
|
|
# Make sure the admin manager has access to the model
|
|
self.manager.model = cls
|
|
|
|
class AdminFieldSet(object):
|
|
def __init__(self, name, classes, field_locator_func, line_specs, description):
|
|
self.name = name
|
|
self.field_lines = [AdminFieldLine(field_locator_func, line_spec) for line_spec in line_specs]
|
|
self.classes = classes
|
|
self.description = description
|
|
|
|
def __repr__(self):
|
|
return "FieldSet: (%s, %s)" % (self.name, self.field_lines)
|
|
|
|
def bind(self, field_mapping, original, bound_field_set_class):
|
|
return bound_field_set_class(self, field_mapping, original)
|
|
|
|
def __iter__(self):
|
|
for field_line in self.field_lines:
|
|
yield field_line
|
|
|
|
def __len__(self):
|
|
return len(self.field_lines)
|
|
|
|
class AdminFieldLine(object):
|
|
def __init__(self, field_locator_func, linespec):
|
|
if isinstance(linespec, basestring):
|
|
self.fields = [field_locator_func(linespec)]
|
|
else:
|
|
self.fields = [field_locator_func(field_name) for field_name in linespec]
|
|
|
|
def bind(self, field_mapping, original, bound_field_line_class):
|
|
return bound_field_line_class(self, field_mapping, original)
|
|
|
|
def __iter__(self):
|
|
for field in self.fields:
|
|
yield field
|
|
|
|
def __len__(self):
|
|
return len(self.fields)
|