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efe87d3e48
Generic Foreign Keys can't be used as lhs in lookups for historical
reasons. Django 1.6 gave a FieldDoesNotExist exception when using GFKs
as lhs in lookups, but due to regression caused by lookup refactor patch
(20bab2cf9d) the exception type was
changed to AttributeError.
It might be a good idea to add support for gfk__exact and gfk__in lookups
later on.
Thanks to glicerinu@gmail.com for the report. The code in this commit
was written by Tim Graham.
532 lines
23 KiB
Python
532 lines
23 KiB
Python
from __future__ import unicode_literals
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from django import forms
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from django.contrib.contenttypes.forms import generic_inlineformset_factory
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from django.contrib.contenttypes.models import ContentType
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from django.core.exceptions import FieldError
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from django.db.models import Q
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from django.test import TestCase
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from django.utils import six
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from .models import (TaggedItem, ValuableTaggedItem, Comparison, Animal,
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Vegetable, Mineral, Gecko, Rock, ManualPK,
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ForProxyModelModel, ForConcreteModelModel,
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ProxyRelatedModel, ConcreteRelatedModel, AllowsNullGFK)
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class GenericRelationsTests(TestCase):
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def setUp(self):
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self.lion = Animal.objects.create(
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common_name="Lion", latin_name="Panthera leo")
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self.platypus = Animal.objects.create(
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common_name="Platypus", latin_name="Ornithorhynchus anatinus")
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Vegetable.objects.create(name="Eggplant", is_yucky=True)
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self.bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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self.quartz = Mineral.objects.create(name="Quartz", hardness=7)
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# Tagging stuff.
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self.bacon.tags.create(tag="fatty")
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self.bacon.tags.create(tag="salty")
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self.lion.tags.create(tag="yellow")
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self.lion.tags.create(tag="hairy")
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# Original list of tags:
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self.comp_func = lambda obj: (
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obj.tag, obj.content_type.model_class(), obj.object_id
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)
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def test_generic_relations_m2m_mimic(self):
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"""
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Objects with declared GenericRelations can be tagged directly -- the
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API mimics the many-to-many API.
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"""
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self.assertQuerysetEqual(self.lion.tags.all(), [
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"<TaggedItem: hairy>",
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"<TaggedItem: yellow>"
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])
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self.assertQuerysetEqual(self.bacon.tags.all(), [
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"<TaggedItem: fatty>",
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"<TaggedItem: salty>"
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])
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def test_access_content_object(self):
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"""
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Test accessing the content object like a foreign key.
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"""
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tagged_item = TaggedItem.objects.get(tag="salty")
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self.assertEqual(tagged_item.content_object, self.bacon)
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def test_query_content_object(self):
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qs = TaggedItem.objects.filter(
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animal__isnull=False).order_by('animal__common_name', 'tag')
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self.assertQuerysetEqual(
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qs, ["<TaggedItem: hairy>", "<TaggedItem: yellow>"]
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)
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mpk = ManualPK.objects.create(id=1)
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mpk.tags.create(tag='mpk')
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qs = TaggedItem.objects.filter(
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Q(animal__isnull=False) | Q(manualpk__id=1)).order_by('tag')
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self.assertQuerysetEqual(
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qs, ["hairy", "mpk", "yellow"], lambda x: x.tag)
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def test_exclude_generic_relations(self):
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"""
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Test lookups over an object without GenericRelations.
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"""
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# Recall that the Mineral class doesn't have an explicit GenericRelation
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# defined. That's OK, because you can create TaggedItems explicitly.
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# However, excluding GenericRelations means your lookups have to be a
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# bit more explicit.
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TaggedItem.objects.create(content_object=self.quartz, tag="shiny")
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TaggedItem.objects.create(content_object=self.quartz, tag="clearish")
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ctype = ContentType.objects.get_for_model(self.quartz)
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q = TaggedItem.objects.filter(
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content_type__pk=ctype.id, object_id=self.quartz.id
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)
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self.assertQuerysetEqual(q, [
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"<TaggedItem: clearish>",
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"<TaggedItem: shiny>"
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])
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def test_access_via_content_type(self):
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"""
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Test lookups through content type.
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"""
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self.lion.delete()
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self.platypus.tags.create(tag="fatty")
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ctype = ContentType.objects.get_for_model(self.platypus)
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self.assertQuerysetEqual(
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Animal.objects.filter(tags__content_type=ctype),
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["<Animal: Platypus>"])
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def test_set_foreign_key(self):
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"""
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You can set a generic foreign key in the way you'd expect.
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"""
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tag1 = TaggedItem.objects.create(content_object=self.quartz, tag="shiny")
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tag1.content_object = self.platypus
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tag1.save()
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self.assertQuerysetEqual(
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self.platypus.tags.all(),
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["<TaggedItem: shiny>"])
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def test_queries_across_generic_relations(self):
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"""
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Queries across generic relations respect the content types. Even though
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there are two TaggedItems with a tag of "fatty", this query only pulls
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out the one with the content type related to Animals.
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"""
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self.assertQuerysetEqual(Animal.objects.order_by('common_name'), [
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"<Animal: Lion>",
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"<Animal: Platypus>"
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])
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def test_queries_content_type_restriction(self):
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"""
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Create another fatty tagged instance with different PK to ensure there
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is a content type restriction in the generated queries below.
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"""
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mpk = ManualPK.objects.create(id=self.lion.pk)
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mpk.tags.create(tag="fatty")
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self.platypus.tags.create(tag="fatty")
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self.assertQuerysetEqual(
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Animal.objects.filter(tags__tag='fatty'), ["<Animal: Platypus>"])
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self.assertQuerysetEqual(
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Animal.objects.exclude(tags__tag='fatty'), ["<Animal: Lion>"])
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def test_object_deletion_with_generic_relation(self):
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"""
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If you delete an object with an explicit Generic relation, the related
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objects are deleted when the source object is deleted.
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"""
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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('fatty', Vegetable, self.bacon.pk),
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('hairy', Animal, self.lion.pk),
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('salty', Vegetable, self.bacon.pk),
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('yellow', Animal, self.lion.pk)
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],
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self.comp_func
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)
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self.lion.delete()
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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('fatty', Vegetable, self.bacon.pk),
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('salty', Vegetable, self.bacon.pk),
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],
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self.comp_func
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)
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def test_object_deletion_without_generic_relation(self):
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"""
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If Generic Relation is not explicitly defined, any related objects
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remain after deletion of the source object.
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"""
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TaggedItem.objects.create(content_object=self.quartz, tag="clearish")
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quartz_pk = self.quartz.pk
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self.quartz.delete()
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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('clearish', Mineral, quartz_pk),
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('fatty', Vegetable, self.bacon.pk),
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('hairy', Animal, self.lion.pk),
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('salty', Vegetable, self.bacon.pk),
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('yellow', Animal, self.lion.pk),
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],
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self.comp_func
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)
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def test_tag_deletion_related_objects_unaffected(self):
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"""
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If you delete a tag, the objects using the tag are unaffected (other
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than losing a tag).
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"""
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ctype = ContentType.objects.get_for_model(self.lion)
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tag = TaggedItem.objects.get(
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content_type__pk=ctype.id, object_id=self.lion.id, tag="hairy")
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tag.delete()
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self.assertQuerysetEqual(self.lion.tags.all(), ["<TaggedItem: yellow>"])
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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('fatty', Vegetable, self.bacon.pk),
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('salty', Vegetable, self.bacon.pk),
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('yellow', Animal, self.lion.pk)
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],
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self.comp_func
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)
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def test_assign_with_queryset(self):
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# Ensure that querysets used in reverse GFK assignments are pre-evaluated
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# so their value isn't affected by the clearing operation in
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# ManyRelatedObjectsDescriptor.__set__. Refs #19816.
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bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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bacon.tags.create(tag="fatty")
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bacon.tags.create(tag="salty")
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self.assertEqual(2, bacon.tags.count())
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qs = bacon.tags.filter(tag="fatty")
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bacon.tags = qs
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self.assertEqual(1, bacon.tags.count())
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self.assertEqual(1, qs.count())
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def test_generic_relation_related_name_default(self):
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# Test that GenericRelation by default isn't usable from
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# the reverse side.
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with self.assertRaises(FieldError):
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TaggedItem.objects.filter(vegetable__isnull=True)
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def test_multiple_gfk(self):
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# Simple tests for multiple GenericForeignKeys
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# only uses one model, since the above tests should be sufficient.
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tiger = Animal.objects.create(common_name="tiger")
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cheetah = Animal.objects.create(common_name="cheetah")
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bear = Animal.objects.create(common_name="bear")
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# Create directly
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Comparison.objects.create(
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first_obj=cheetah, other_obj=tiger, comparative="faster"
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)
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Comparison.objects.create(
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first_obj=tiger, other_obj=cheetah, comparative="cooler"
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)
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# Create using GenericRelation
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tiger.comparisons.create(other_obj=bear, comparative="cooler")
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tiger.comparisons.create(other_obj=cheetah, comparative="stronger")
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self.assertQuerysetEqual(cheetah.comparisons.all(), [
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"<Comparison: cheetah is faster than tiger>"
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])
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# Filtering works
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self.assertQuerysetEqual(tiger.comparisons.filter(comparative="cooler"), [
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"<Comparison: tiger is cooler than cheetah>",
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"<Comparison: tiger is cooler than bear>",
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], ordered=False)
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# Filtering and deleting works
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subjective = ["cooler"]
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tiger.comparisons.filter(comparative__in=subjective).delete()
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self.assertQuerysetEqual(Comparison.objects.all(), [
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"<Comparison: cheetah is faster than tiger>",
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"<Comparison: tiger is stronger than cheetah>"
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], ordered=False)
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# If we delete cheetah, Comparisons with cheetah as 'first_obj' will be
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# deleted since Animal has an explicit GenericRelation to Comparison
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# through first_obj. Comparisons with cheetah as 'other_obj' will not
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# be deleted.
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cheetah.delete()
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self.assertQuerysetEqual(Comparison.objects.all(), [
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"<Comparison: tiger is stronger than None>"
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])
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def test_gfk_subclasses(self):
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# GenericForeignKey should work with subclasses (see #8309)
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quartz = Mineral.objects.create(name="Quartz", hardness=7)
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valuedtag = ValuableTaggedItem.objects.create(
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content_object=quartz, tag="shiny", value=10
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)
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self.assertEqual(valuedtag.content_object, quartz)
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def test_generic_inline_formsets(self):
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GenericFormSet = generic_inlineformset_factory(TaggedItem, extra=1)
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formset = GenericFormSet()
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self.assertHTMLEqual(''.join(form.as_p() for form in formset.forms), """<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-tag">Tag:</label> <input id="id_generic_relations-taggeditem-content_type-object_id-0-tag" type="text" name="generic_relations-taggeditem-content_type-object_id-0-tag" maxlength="50" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-DELETE">Delete:</label> <input type="checkbox" name="generic_relations-taggeditem-content_type-object_id-0-DELETE" id="id_generic_relations-taggeditem-content_type-object_id-0-DELETE" /><input type="hidden" name="generic_relations-taggeditem-content_type-object_id-0-id" id="id_generic_relations-taggeditem-content_type-object_id-0-id" /></p>""")
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formset = GenericFormSet(instance=Animal())
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self.assertHTMLEqual(''.join(form.as_p() for form in formset.forms), """<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-tag">Tag:</label> <input id="id_generic_relations-taggeditem-content_type-object_id-0-tag" type="text" name="generic_relations-taggeditem-content_type-object_id-0-tag" maxlength="50" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-DELETE">Delete:</label> <input type="checkbox" name="generic_relations-taggeditem-content_type-object_id-0-DELETE" id="id_generic_relations-taggeditem-content_type-object_id-0-DELETE" /><input type="hidden" name="generic_relations-taggeditem-content_type-object_id-0-id" id="id_generic_relations-taggeditem-content_type-object_id-0-id" /></p>""")
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platypus = Animal.objects.create(
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common_name="Platypus", latin_name="Ornithorhynchus anatinus"
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)
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platypus.tags.create(tag="shiny")
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GenericFormSet = generic_inlineformset_factory(TaggedItem, extra=1)
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formset = GenericFormSet(instance=platypus)
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tagged_item_id = TaggedItem.objects.get(
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tag='shiny', object_id=platypus.id
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).id
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self.assertHTMLEqual(''.join(form.as_p() for form in formset.forms), """<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-tag">Tag:</label> <input id="id_generic_relations-taggeditem-content_type-object_id-0-tag" type="text" name="generic_relations-taggeditem-content_type-object_id-0-tag" value="shiny" maxlength="50" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-0-DELETE">Delete:</label> <input type="checkbox" name="generic_relations-taggeditem-content_type-object_id-0-DELETE" id="id_generic_relations-taggeditem-content_type-object_id-0-DELETE" /><input type="hidden" name="generic_relations-taggeditem-content_type-object_id-0-id" value="%s" id="id_generic_relations-taggeditem-content_type-object_id-0-id" /></p><p><label for="id_generic_relations-taggeditem-content_type-object_id-1-tag">Tag:</label> <input id="id_generic_relations-taggeditem-content_type-object_id-1-tag" type="text" name="generic_relations-taggeditem-content_type-object_id-1-tag" maxlength="50" /></p>
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<p><label for="id_generic_relations-taggeditem-content_type-object_id-1-DELETE">Delete:</label> <input type="checkbox" name="generic_relations-taggeditem-content_type-object_id-1-DELETE" id="id_generic_relations-taggeditem-content_type-object_id-1-DELETE" /><input type="hidden" name="generic_relations-taggeditem-content_type-object_id-1-id" id="id_generic_relations-taggeditem-content_type-object_id-1-id" /></p>""" % tagged_item_id)
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lion = Animal.objects.create(common_name="Lion", latin_name="Panthera leo")
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formset = GenericFormSet(instance=lion, prefix='x')
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self.assertHTMLEqual(''.join(form.as_p() for form in formset.forms), """<p><label for="id_x-0-tag">Tag:</label> <input id="id_x-0-tag" type="text" name="x-0-tag" maxlength="50" /></p>
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<p><label for="id_x-0-DELETE">Delete:</label> <input type="checkbox" name="x-0-DELETE" id="id_x-0-DELETE" /><input type="hidden" name="x-0-id" id="id_x-0-id" /></p>""")
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def test_gfk_manager(self):
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# GenericForeignKey should not use the default manager (which may filter objects) #16048
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tailless = Gecko.objects.create(has_tail=False)
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tag = TaggedItem.objects.create(content_object=tailless, tag="lizard")
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self.assertEqual(tag.content_object, tailless)
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def test_subclasses_with_gen_rel(self):
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"""
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Test that concrete model subclasses with generic relations work
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correctly (ticket 11263).
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"""
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granite = Rock.objects.create(name='granite', hardness=5)
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TaggedItem.objects.create(content_object=granite, tag="countertop")
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self.assertEqual(Rock.objects.filter(tags__tag="countertop").count(), 1)
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def test_generic_inline_formsets_initial(self):
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"""
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Test for #17927 Initial values support for BaseGenericInlineFormSet.
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"""
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quartz = Mineral.objects.create(name="Quartz", hardness=7)
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GenericFormSet = generic_inlineformset_factory(TaggedItem, extra=1)
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ctype = ContentType.objects.get_for_model(quartz)
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initial_data = [{
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'tag': 'lizard',
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'content_type': ctype.pk,
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'object_id': quartz.pk,
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}]
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formset = GenericFormSet(initial=initial_data)
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self.assertEqual(formset.forms[0].initial, initial_data[0])
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def test_get_or_create(self):
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# get_or_create should work with virtual fields (content_object)
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quartz = Mineral.objects.create(name="Quartz", hardness=7)
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tag, created = TaggedItem.objects.get_or_create(tag="shiny",
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defaults={'content_object': quartz})
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self.assertTrue(created)
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self.assertEqual(tag.tag, "shiny")
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self.assertEqual(tag.content_object.id, quartz.id)
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def test_update_or_create_defaults(self):
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# update_or_create should work with virtual fields (content_object)
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quartz = Mineral.objects.create(name="Quartz", hardness=7)
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diamond = Mineral.objects.create(name="Diamond", hardness=7)
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tag, created = TaggedItem.objects.update_or_create(tag="shiny",
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defaults={'content_object': quartz})
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self.assertTrue(created)
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self.assertEqual(tag.content_object.id, quartz.id)
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tag, created = TaggedItem.objects.update_or_create(tag="shiny",
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defaults={'content_object': diamond})
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self.assertFalse(created)
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self.assertEqual(tag.content_object.id, diamond.id)
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def test_query_content_type(self):
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with six.assertRaisesRegex(self, FieldError, "^Cannot resolve keyword 'content_object' into field."):
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TaggedItem.objects.get(content_object='')
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class CustomWidget(forms.TextInput):
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pass
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class TaggedItemForm(forms.ModelForm):
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class Meta:
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model = TaggedItem
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fields = '__all__'
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widgets = {'tag': CustomWidget}
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class GenericInlineFormsetTest(TestCase):
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def test_generic_inlineformset_factory(self):
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"""
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Regression for #14572: Using base forms with widgets
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defined in Meta should not raise errors.
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"""
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Formset = generic_inlineformset_factory(TaggedItem, TaggedItemForm)
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form = Formset().forms[0]
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self.assertIsInstance(form['tag'].field.widget, CustomWidget)
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def test_save_new_uses_form_save(self):
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"""
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Regression for #16260: save_new should call form.save()
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"""
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class SaveTestForm(forms.ModelForm):
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def save(self, *args, **kwargs):
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self.instance.saved_by = "custom method"
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return super(SaveTestForm, self).save(*args, **kwargs)
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Formset = generic_inlineformset_factory(
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ForProxyModelModel, fields='__all__', form=SaveTestForm)
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instance = ProxyRelatedModel.objects.create()
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data = {
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'form-TOTAL_FORMS': '1',
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'form-INITIAL_FORMS': '0',
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'form-MAX_NUM_FORMS': '',
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|
'form-0-title': 'foo',
|
|
}
|
|
|
|
formset = Formset(data, instance=instance, prefix='form')
|
|
self.assertTrue(formset.is_valid())
|
|
new_obj = formset.save()[0]
|
|
self.assertEqual(new_obj.saved_by, "custom method")
|
|
|
|
def test_save_new_for_proxy(self):
|
|
Formset = generic_inlineformset_factory(ForProxyModelModel,
|
|
fields='__all__', for_concrete_model=False)
|
|
|
|
instance = ProxyRelatedModel.objects.create()
|
|
|
|
data = {
|
|
'form-TOTAL_FORMS': '1',
|
|
'form-INITIAL_FORMS': '0',
|
|
'form-MAX_NUM_FORMS': '',
|
|
'form-0-title': 'foo',
|
|
}
|
|
|
|
formset = Formset(data, instance=instance, prefix='form')
|
|
self.assertTrue(formset.is_valid())
|
|
|
|
new_obj, = formset.save()
|
|
self.assertEqual(new_obj.obj, instance)
|
|
|
|
def test_save_new_for_concrete(self):
|
|
Formset = generic_inlineformset_factory(ForProxyModelModel,
|
|
fields='__all__', for_concrete_model=True)
|
|
|
|
instance = ProxyRelatedModel.objects.create()
|
|
|
|
data = {
|
|
'form-TOTAL_FORMS': '1',
|
|
'form-INITIAL_FORMS': '0',
|
|
'form-MAX_NUM_FORMS': '',
|
|
'form-0-title': 'foo',
|
|
}
|
|
|
|
formset = Formset(data, instance=instance, prefix='form')
|
|
self.assertTrue(formset.is_valid())
|
|
|
|
new_obj, = formset.save()
|
|
self.assertNotIsInstance(new_obj.obj, ProxyRelatedModel)
|
|
|
|
|
|
class ProxyRelatedModelTest(TestCase):
|
|
def test_default_behavior(self):
|
|
"""
|
|
The default for for_concrete_model should be True
|
|
"""
|
|
base = ForConcreteModelModel()
|
|
base.obj = rel = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForConcreteModelModel.objects.get(pk=base.pk)
|
|
rel = ConcreteRelatedModel.objects.get(pk=rel.pk)
|
|
self.assertEqual(base.obj, rel)
|
|
|
|
def test_works_normally(self):
|
|
"""
|
|
When for_concrete_model is False, we should still be able to get
|
|
an instance of the concrete class.
|
|
"""
|
|
base = ForProxyModelModel()
|
|
base.obj = rel = ConcreteRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForProxyModelModel.objects.get(pk=base.pk)
|
|
self.assertEqual(base.obj, rel)
|
|
|
|
def test_proxy_is_returned(self):
|
|
"""
|
|
Instances of the proxy should be returned when
|
|
for_concrete_model is False.
|
|
"""
|
|
base = ForProxyModelModel()
|
|
base.obj = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForProxyModelModel.objects.get(pk=base.pk)
|
|
self.assertIsInstance(base.obj, ProxyRelatedModel)
|
|
|
|
def test_query(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = rel = ConcreteRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
self.assertEqual(rel, ConcreteRelatedModel.objects.get(bases__id=base.id))
|
|
|
|
def test_query_proxy(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = rel = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
self.assertEqual(rel, ProxyRelatedModel.objects.get(bases__id=base.id))
|
|
|
|
def test_generic_relation(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForProxyModelModel.objects.get(pk=base.pk)
|
|
rel = ProxyRelatedModel.objects.get(pk=base.obj.pk)
|
|
self.assertEqual(base, rel.bases.get())
|
|
|
|
def test_generic_relation_set(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = ConcreteRelatedModel.objects.create()
|
|
base.save()
|
|
newrel = ConcreteRelatedModel.objects.create()
|
|
|
|
newrel.bases = [base]
|
|
newrel = ConcreteRelatedModel.objects.get(pk=newrel.pk)
|
|
self.assertEqual(base, newrel.bases.get())
|
|
|
|
|
|
class TestInitWithNoneArgument(TestCase):
|
|
def test_none_not_allowed(self):
|
|
# TaggedItem requires a content_type, initializing with None should
|
|
# raise a ValueError.
|
|
with six.assertRaisesRegex(self, ValueError,
|
|
'Cannot assign None: "TaggedItem.content_type" does not allow null values'):
|
|
TaggedItem(content_object=None)
|
|
|
|
def test_none_allowed(self):
|
|
# AllowsNullGFK doesn't require a content_type, so None argument should
|
|
# also be allowed.
|
|
AllowsNullGFK(content_object=None)
|