433 lines
23 KiB
Python
433 lines
23 KiB
Python
from django.core.exceptions import ImproperlyConfigured
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from django.db import models
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from django.db.models.fields import FieldDoesNotExist
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from django.forms.models import BaseModelForm, BaseModelFormSet, _get_foreign_key
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from django.contrib.admin.utils import get_fields_from_path, NotRelationField
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"""
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Does basic ModelAdmin option validation. Calls custom validation
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classmethod in the end if it is provided in cls. The signature of the
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custom validation classmethod should be: def validate(cls, model).
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"""
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__all__ = ['BaseValidator', 'InlineValidator']
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class BaseValidator(object):
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def __init__(self):
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# Before we can introspect models, they need to be fully loaded so that
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# inter-relations are set up correctly. We force that here.
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models.get_apps()
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def validate(self, cls, model):
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for m in dir(self):
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if m.startswith('validate_'):
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getattr(self, m)(cls, model)
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def check_field_spec(self, cls, model, flds, label):
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"""
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Validate the fields specification in `flds` from a ModelAdmin subclass
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`cls` for the `model` model. Use `label` for reporting problems to the user.
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The fields specification can be a ``fields`` option or a ``fields``
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sub-option from a ``fieldsets`` option component.
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"""
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for fields in flds:
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# The entry in fields might be a tuple. If it is a standalone
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# field, make it into a tuple to make processing easier.
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if type(fields) != tuple:
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fields = (fields,)
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for field in fields:
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if field in cls.readonly_fields:
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# Stuff can be put in fields that isn't actually a
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# model field if it's in readonly_fields,
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# readonly_fields will handle the validation of such
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# things.
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continue
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try:
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f = model._meta.get_field(field)
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except models.FieldDoesNotExist:
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# If we can't find a field on the model that matches, it could be an
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# extra field on the form; nothing to check so move on to the next field.
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continue
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if isinstance(f, models.ManyToManyField) and not f.rel.through._meta.auto_created:
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raise ImproperlyConfigured("'%s.%s' "
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"can't include the ManyToManyField field '%s' because "
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"'%s' manually specifies a 'through' model." % (
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cls.__name__, label, field, field))
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def validate_raw_id_fields(self, cls, model):
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" Validate that raw_id_fields only contains field names that are listed on the model. "
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if hasattr(cls, 'raw_id_fields'):
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check_isseq(cls, 'raw_id_fields', cls.raw_id_fields)
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for idx, field in enumerate(cls.raw_id_fields):
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f = get_field(cls, model, 'raw_id_fields', field)
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if not isinstance(f, (models.ForeignKey, models.ManyToManyField)):
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raise ImproperlyConfigured("'%s.raw_id_fields[%d]', '%s' must "
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"be either a ForeignKey or ManyToManyField."
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% (cls.__name__, idx, field))
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def validate_fields(self, cls, model):
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" Validate that fields only refer to existing fields, doesn't contain duplicates. "
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# fields
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if cls.fields: # default value is None
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check_isseq(cls, 'fields', cls.fields)
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self.check_field_spec(cls, model, cls.fields, 'fields')
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if cls.fieldsets:
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raise ImproperlyConfigured('Both fieldsets and fields are specified in %s.' % cls.__name__)
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if len(cls.fields) > len(set(cls.fields)):
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raise ImproperlyConfigured('There are duplicate field(s) in %s.fields' % cls.__name__)
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def validate_fieldsets(self, cls, model):
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" Validate that fieldsets is properly formatted and doesn't contain duplicates. "
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from django.contrib.admin.options import flatten_fieldsets
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if cls.fieldsets: # default value is None
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check_isseq(cls, 'fieldsets', cls.fieldsets)
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for idx, fieldset in enumerate(cls.fieldsets):
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check_isseq(cls, 'fieldsets[%d]' % idx, fieldset)
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if len(fieldset) != 2:
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raise ImproperlyConfigured("'%s.fieldsets[%d]' does not "
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"have exactly two elements." % (cls.__name__, idx))
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check_isdict(cls, 'fieldsets[%d][1]' % idx, fieldset[1])
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if 'fields' not in fieldset[1]:
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raise ImproperlyConfigured("'fields' key is required in "
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"%s.fieldsets[%d][1] field options dict."
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% (cls.__name__, idx))
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self.check_field_spec(cls, model, fieldset[1]['fields'], "fieldsets[%d][1]['fields']" % idx)
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flattened_fieldsets = flatten_fieldsets(cls.fieldsets)
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if len(flattened_fieldsets) > len(set(flattened_fieldsets)):
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raise ImproperlyConfigured('There are duplicate field(s) in %s.fieldsets' % cls.__name__)
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def validate_exclude(self, cls, model):
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" Validate that exclude is a sequence without duplicates. "
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if cls.exclude: # default value is None
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check_isseq(cls, 'exclude', cls.exclude)
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if len(cls.exclude) > len(set(cls.exclude)):
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raise ImproperlyConfigured('There are duplicate field(s) in %s.exclude' % cls.__name__)
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def validate_form(self, cls, model):
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" Validate that form subclasses BaseModelForm. "
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if hasattr(cls, 'form') and not issubclass(cls.form, BaseModelForm):
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raise ImproperlyConfigured("%s.form does not inherit from "
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"BaseModelForm." % cls.__name__)
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def validate_filter_vertical(self, cls, model):
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" Validate that filter_vertical is a sequence of field names. "
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if hasattr(cls, 'filter_vertical'):
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check_isseq(cls, 'filter_vertical', cls.filter_vertical)
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for idx, field in enumerate(cls.filter_vertical):
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f = get_field(cls, model, 'filter_vertical', field)
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if not isinstance(f, models.ManyToManyField):
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raise ImproperlyConfigured("'%s.filter_vertical[%d]' must be "
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"a ManyToManyField." % (cls.__name__, idx))
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def validate_filter_horizontal(self, cls, model):
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" Validate that filter_horizontal is a sequence of field names. "
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if hasattr(cls, 'filter_horizontal'):
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check_isseq(cls, 'filter_horizontal', cls.filter_horizontal)
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for idx, field in enumerate(cls.filter_horizontal):
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f = get_field(cls, model, 'filter_horizontal', field)
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if not isinstance(f, models.ManyToManyField):
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raise ImproperlyConfigured("'%s.filter_horizontal[%d]' must be "
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"a ManyToManyField." % (cls.__name__, idx))
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def validate_radio_fields(self, cls, model):
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" Validate that radio_fields is a dictionary of choice or foreign key fields. "
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from django.contrib.admin.options import HORIZONTAL, VERTICAL
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if hasattr(cls, 'radio_fields'):
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check_isdict(cls, 'radio_fields', cls.radio_fields)
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for field, val in cls.radio_fields.items():
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f = get_field(cls, model, 'radio_fields', field)
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if not (isinstance(f, models.ForeignKey) or f.choices):
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raise ImproperlyConfigured("'%s.radio_fields['%s']' "
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"is neither an instance of ForeignKey nor does "
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"have choices set." % (cls.__name__, field))
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if not val in (HORIZONTAL, VERTICAL):
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raise ImproperlyConfigured("'%s.radio_fields['%s']' "
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"is neither admin.HORIZONTAL nor admin.VERTICAL."
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% (cls.__name__, field))
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def validate_prepopulated_fields(self, cls, model):
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" Validate that prepopulated_fields if a dictionary containing allowed field types. "
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# prepopulated_fields
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if hasattr(cls, 'prepopulated_fields'):
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check_isdict(cls, 'prepopulated_fields', cls.prepopulated_fields)
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for field, val in cls.prepopulated_fields.items():
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f = get_field(cls, model, 'prepopulated_fields', field)
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if isinstance(f, (models.DateTimeField, models.ForeignKey,
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models.ManyToManyField)):
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raise ImproperlyConfigured("'%s.prepopulated_fields['%s']' "
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"is either a DateTimeField, ForeignKey or "
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"ManyToManyField. This isn't allowed."
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% (cls.__name__, field))
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check_isseq(cls, "prepopulated_fields['%s']" % field, val)
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for idx, f in enumerate(val):
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get_field(cls, model, "prepopulated_fields['%s'][%d]" % (field, idx), f)
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def validate_ordering(self, cls, model):
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" Validate that ordering refers to existing fields or is random. "
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# ordering = None
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if cls.ordering:
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check_isseq(cls, 'ordering', cls.ordering)
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for idx, field in enumerate(cls.ordering):
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if field == '?' and len(cls.ordering) != 1:
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raise ImproperlyConfigured("'%s.ordering' has the random "
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"ordering marker '?', but contains other fields as "
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"well. Please either remove '?' or the other fields."
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% cls.__name__)
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if field == '?':
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continue
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if field.startswith('-'):
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field = field[1:]
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# Skip ordering in the format field1__field2 (FIXME: checking
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# this format would be nice, but it's a little fiddly).
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if '__' in field:
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continue
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get_field(cls, model, 'ordering[%d]' % idx, field)
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def validate_readonly_fields(self, cls, model):
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" Validate that readonly_fields refers to proper attribute or field. "
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if hasattr(cls, "readonly_fields"):
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check_isseq(cls, "readonly_fields", cls.readonly_fields)
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for idx, field in enumerate(cls.readonly_fields):
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if not callable(field):
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if not hasattr(cls, field):
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if not hasattr(model, field):
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try:
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model._meta.get_field(field)
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except models.FieldDoesNotExist:
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raise ImproperlyConfigured("%s.readonly_fields[%d], %r is not a callable or an attribute of %r or found in the model %r."
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% (cls.__name__, idx, field, cls.__name__, model._meta.object_name))
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class ModelAdminValidator(BaseValidator):
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def validate_save_as(self, cls, model):
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" Validate save_as is a boolean. "
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check_type(cls, 'save_as', bool)
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def validate_save_on_top(self, cls, model):
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" Validate save_on_top is a boolean. "
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check_type(cls, 'save_on_top', bool)
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def validate_inlines(self, cls, model):
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" Validate inline model admin classes. "
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from django.contrib.admin.options import BaseModelAdmin
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if hasattr(cls, 'inlines'):
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check_isseq(cls, 'inlines', cls.inlines)
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for idx, inline in enumerate(cls.inlines):
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if not issubclass(inline, BaseModelAdmin):
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raise ImproperlyConfigured("'%s.inlines[%d]' does not inherit "
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"from BaseModelAdmin." % (cls.__name__, idx))
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if not inline.model:
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raise ImproperlyConfigured("'model' is a required attribute "
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"of '%s.inlines[%d]'." % (cls.__name__, idx))
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if not issubclass(inline.model, models.Model):
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raise ImproperlyConfigured("'%s.inlines[%d].model' does not "
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"inherit from models.Model." % (cls.__name__, idx))
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inline.validate(inline.model)
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self.check_inline(inline, model)
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def check_inline(self, cls, parent_model):
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" Validate inline class's fk field is not excluded. "
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fk = _get_foreign_key(parent_model, cls.model, fk_name=cls.fk_name, can_fail=True)
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if hasattr(cls, 'exclude') and cls.exclude:
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if fk and fk.name in cls.exclude:
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raise ImproperlyConfigured("%s cannot exclude the field "
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"'%s' - this is the foreign key to the parent model "
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"%s.%s." % (cls.__name__, fk.name, parent_model._meta.app_label, parent_model.__name__))
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def validate_list_display(self, cls, model):
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" Validate that list_display only contains fields or usable attributes. "
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if hasattr(cls, 'list_display'):
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check_isseq(cls, 'list_display', cls.list_display)
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for idx, field in enumerate(cls.list_display):
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if not callable(field):
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if not hasattr(cls, field):
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if not hasattr(model, field):
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try:
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model._meta.get_field(field)
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except models.FieldDoesNotExist:
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raise ImproperlyConfigured("%s.list_display[%d], %r is not a callable or an attribute of %r or found in the model %r."
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% (cls.__name__, idx, field, cls.__name__, model._meta.object_name))
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else:
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# getattr(model, field) could be an X_RelatedObjectsDescriptor
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f = fetch_attr(cls, model, "list_display[%d]" % idx, field)
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if isinstance(f, models.ManyToManyField):
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raise ImproperlyConfigured("'%s.list_display[%d]', '%s' is a ManyToManyField which is not supported."
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% (cls.__name__, idx, field))
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def validate_list_display_links(self, cls, model):
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" Validate that list_display_links either is None or a unique subset of list_display."
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if hasattr(cls, 'list_display_links'):
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if cls.list_display_links is None:
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return
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check_isseq(cls, 'list_display_links', cls.list_display_links)
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for idx, field in enumerate(cls.list_display_links):
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if field not in cls.list_display:
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raise ImproperlyConfigured("'%s.list_display_links[%d]' "
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"refers to '%s' which is not defined in 'list_display'."
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% (cls.__name__, idx, field))
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def validate_list_filter(self, cls, model):
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"""
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Validate that list_filter is a sequence of one of three options:
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1: 'field' - a basic field filter, possibly w/ relationships (eg, 'field__rel')
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2: ('field', SomeFieldListFilter) - a field-based list filter class
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3: SomeListFilter - a non-field list filter class
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"""
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from django.contrib.admin import ListFilter, FieldListFilter
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if hasattr(cls, 'list_filter'):
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check_isseq(cls, 'list_filter', cls.list_filter)
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for idx, item in enumerate(cls.list_filter):
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if callable(item) and not isinstance(item, models.Field):
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# If item is option 3, it should be a ListFilter...
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if not issubclass(item, ListFilter):
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raise ImproperlyConfigured("'%s.list_filter[%d]' is '%s'"
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" which is not a descendant of ListFilter."
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% (cls.__name__, idx, item.__name__))
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# ... but not a FieldListFilter.
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if issubclass(item, FieldListFilter):
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raise ImproperlyConfigured("'%s.list_filter[%d]' is '%s'"
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" which is of type FieldListFilter but is not"
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" associated with a field name."
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% (cls.__name__, idx, item.__name__))
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else:
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if isinstance(item, (tuple, list)):
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# item is option #2
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field, list_filter_class = item
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if not issubclass(list_filter_class, FieldListFilter):
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raise ImproperlyConfigured("'%s.list_filter[%d][1]'"
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" is '%s' which is not of type FieldListFilter."
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% (cls.__name__, idx, list_filter_class.__name__))
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else:
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# item is option #1
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field = item
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# Validate the field string
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try:
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get_fields_from_path(model, field)
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except (NotRelationField, FieldDoesNotExist):
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raise ImproperlyConfigured("'%s.list_filter[%d]' refers to '%s'"
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" which does not refer to a Field."
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% (cls.__name__, idx, field))
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def validate_list_select_related(self, cls, model):
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" Validate that list_select_related is a boolean, a list or a tuple. "
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list_select_related = getattr(cls, 'list_select_related', None)
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if list_select_related:
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types = (bool, tuple, list)
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if not isinstance(list_select_related, types):
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raise ImproperlyConfigured("'%s.list_select_related' should be "
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"either a bool, a tuple or a list" %
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cls.__name__)
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def validate_list_per_page(self, cls, model):
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" Validate that list_per_page is an integer. "
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check_type(cls, 'list_per_page', int)
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def validate_list_max_show_all(self, cls, model):
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" Validate that list_max_show_all is an integer. "
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check_type(cls, 'list_max_show_all', int)
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def validate_list_editable(self, cls, model):
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"""
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Validate that list_editable is a sequence of editable fields from
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list_display without first element.
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"""
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if hasattr(cls, 'list_editable') and cls.list_editable:
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check_isseq(cls, 'list_editable', cls.list_editable)
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for idx, field_name in enumerate(cls.list_editable):
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try:
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field = model._meta.get_field_by_name(field_name)[0]
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except models.FieldDoesNotExist:
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raise ImproperlyConfigured("'%s.list_editable[%d]' refers to a "
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"field, '%s', not defined on %s.%s."
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% (cls.__name__, idx, field_name, model._meta.app_label, model.__name__))
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if field_name not in cls.list_display:
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raise ImproperlyConfigured("'%s.list_editable[%d]' refers to "
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"'%s' which is not defined in 'list_display'."
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% (cls.__name__, idx, field_name))
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if cls.list_display_links is not None:
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if field_name in cls.list_display_links:
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raise ImproperlyConfigured("'%s' cannot be in both '%s.list_editable'"
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" and '%s.list_display_links'"
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% (field_name, cls.__name__, cls.__name__))
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if not cls.list_display_links and cls.list_display[0] in cls.list_editable:
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raise ImproperlyConfigured("'%s.list_editable[%d]' refers to"
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" the first field in list_display, '%s', which can't be"
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" used unless list_display_links is set."
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% (cls.__name__, idx, cls.list_display[0]))
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if not field.editable:
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raise ImproperlyConfigured("'%s.list_editable[%d]' refers to a "
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"field, '%s', which isn't editable through the admin."
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% (cls.__name__, idx, field_name))
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def validate_search_fields(self, cls, model):
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" Validate search_fields is a sequence. "
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if hasattr(cls, 'search_fields'):
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check_isseq(cls, 'search_fields', cls.search_fields)
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def validate_date_hierarchy(self, cls, model):
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" Validate that date_hierarchy refers to DateField or DateTimeField. "
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if cls.date_hierarchy:
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f = get_field(cls, model, 'date_hierarchy', cls.date_hierarchy)
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if not isinstance(f, (models.DateField, models.DateTimeField)):
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raise ImproperlyConfigured("'%s.date_hierarchy is "
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"neither an instance of DateField nor DateTimeField."
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% cls.__name__)
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class InlineValidator(BaseValidator):
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def validate_fk_name(self, cls, model):
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" Validate that fk_name refers to a ForeignKey. "
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if cls.fk_name: # default value is None
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f = get_field(cls, model, 'fk_name', cls.fk_name)
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if not isinstance(f, models.ForeignKey):
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raise ImproperlyConfigured("'%s.fk_name is not an instance of "
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"models.ForeignKey." % cls.__name__)
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def validate_extra(self, cls, model):
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" Validate that extra is an integer. "
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check_type(cls, 'extra', int)
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def validate_max_num(self, cls, model):
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" Validate that max_num is an integer. "
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check_type(cls, 'max_num', int)
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def validate_formset(self, cls, model):
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" Validate formset is a subclass of BaseModelFormSet. "
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if hasattr(cls, 'formset') and not issubclass(cls.formset, BaseModelFormSet):
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raise ImproperlyConfigured("'%s.formset' does not inherit from "
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"BaseModelFormSet." % cls.__name__)
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def check_type(cls, attr, type_):
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if getattr(cls, attr, None) is not None and not isinstance(getattr(cls, attr), type_):
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raise ImproperlyConfigured("'%s.%s' should be a %s."
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% (cls.__name__, attr, type_.__name__))
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def check_isseq(cls, label, obj):
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if not isinstance(obj, (list, tuple)):
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raise ImproperlyConfigured("'%s.%s' must be a list or tuple." % (cls.__name__, label))
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def check_isdict(cls, label, obj):
|
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if not isinstance(obj, dict):
|
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raise ImproperlyConfigured("'%s.%s' must be a dictionary." % (cls.__name__, label))
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def get_field(cls, model, label, field):
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try:
|
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return model._meta.get_field(field)
|
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except models.FieldDoesNotExist:
|
|
raise ImproperlyConfigured("'%s.%s' refers to field '%s' that is missing from model '%s.%s'."
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% (cls.__name__, label, field, model._meta.app_label, model.__name__))
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|
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def fetch_attr(cls, model, label, field):
|
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try:
|
|
return model._meta.get_field(field)
|
|
except models.FieldDoesNotExist:
|
|
pass
|
|
try:
|
|
return getattr(model, field)
|
|
except AttributeError:
|
|
raise ImproperlyConfigured("'%s.%s' refers to '%s' that is neither a field, method or property of model '%s.%s'."
|
|
% (cls.__name__, label, field, model._meta.app_label, model.__name__))
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