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4a103086d5
Thanks Vinay Sajip for the support of his django3 branch and Jannis Leidel for the review.
252 lines
13 KiB
Python
252 lines
13 KiB
Python
from __future__ import absolute_import, unicode_literals
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from django import forms
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from django.contrib.contenttypes.generic import generic_inlineformset_factory
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from django.contrib.contenttypes.models import ContentType
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from django.test import TestCase
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from .models import (TaggedItem, ValuableTaggedItem, Comparison, Animal,
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Vegetable, Mineral, Gecko)
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class GenericRelationsTests(TestCase):
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def test_generic_relations(self):
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# Create the world in 7 lines of code...
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lion = Animal.objects.create(common_name="Lion", latin_name="Panthera leo")
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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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eggplant = Vegetable.objects.create(name="Eggplant", is_yucky=True)
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bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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quartz = Mineral.objects.create(name="Quartz", hardness=7)
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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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bacon.tags.create(tag="fatty")
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bacon.tags.create(tag="salty")
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lion.tags.create(tag="yellow")
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lion.tags.create(tag="hairy")
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platypus.tags.create(tag="fatty")
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self.assertQuerysetEqual(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(bacon.tags.all(), [
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"<TaggedItem: fatty>",
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"<TaggedItem: salty>"
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])
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# You can easily access the content object like a foreign key.
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t = TaggedItem.objects.get(tag="salty")
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self.assertEqual(t.content_object, bacon)
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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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tag1 = TaggedItem.objects.create(content_object=quartz, tag="shiny")
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tag2 = TaggedItem.objects.create(content_object=quartz, tag="clearish")
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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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ctype = ContentType.objects.get_for_model(quartz)
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q = TaggedItem.objects.filter(
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content_type__pk=ctype.id, object_id=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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# You can set a generic foreign key in the way you'd expect.
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tag1.content_object = platypus
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tag1.save()
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self.assertQuerysetEqual(platypus.tags.all(), [
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"<TaggedItem: fatty>",
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"<TaggedItem: shiny>"
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])
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q = TaggedItem.objects.filter(
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content_type__pk=ctype.id, object_id=quartz.id
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)
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self.assertQuerysetEqual(q, ["<TaggedItem: clearish>"])
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# Queries across generic relations respect the content types. Even
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# though there are two TaggedItems with a tag of "fatty", this query
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# only pulls out the one with the content type related to Animals.
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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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self.assertQuerysetEqual(Animal.objects.filter(tags__tag='fatty'), [
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"<Animal: Platypus>"
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])
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self.assertQuerysetEqual(Animal.objects.exclude(tags__tag='fatty'), [
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"<Animal: Lion>"
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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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# Original list of tags:
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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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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('clearish', Mineral, quartz.pk),
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('fatty', Animal, platypus.pk),
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('fatty', Vegetable, bacon.pk),
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('hairy', Animal, lion.pk),
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('salty', Vegetable, bacon.pk),
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('shiny', Animal, platypus.pk),
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('yellow', Animal, lion.pk)
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],
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comp_func
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)
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lion.delete()
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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('clearish', Mineral, quartz.pk),
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('fatty', Animal, platypus.pk),
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('fatty', Vegetable, bacon.pk),
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('salty', Vegetable, bacon.pk),
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('shiny', Animal, platypus.pk)
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],
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comp_func
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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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quartz_pk = quartz.pk
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quartz.delete()
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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('clearish', Mineral, quartz_pk),
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('fatty', Animal, platypus.pk),
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('fatty', Vegetable, bacon.pk),
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('salty', Vegetable, bacon.pk),
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('shiny', Animal, platypus.pk)
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],
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comp_func
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)
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# If you delete a tag, the objects using the tag are unaffected
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# (other than losing a tag)
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tag = TaggedItem.objects.order_by("id")[0]
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tag.delete()
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self.assertQuerysetEqual(bacon.tags.all(), ["<TaggedItem: salty>"])
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self.assertQuerysetEqual(TaggedItem.objects.all(), [
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('clearish', Mineral, quartz_pk),
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('fatty', Animal, platypus.pk),
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('salty', Vegetable, bacon.pk),
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('shiny', Animal, platypus.pk)
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],
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comp_func
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)
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TaggedItem.objects.filter(tag='fatty').delete()
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ctype = ContentType.objects.get_for_model(lion)
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self.assertQuerysetEqual(Animal.objects.filter(tags__content_type=ctype), [
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"<Animal: Platypus>"
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])
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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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])
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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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])
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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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class CustomWidget(forms.CharField):
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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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widgets = {'tag': CustomWidget}
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class GenericInlineFormsetTest(TestCase):
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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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def test_generic_inlineformset_factory(self):
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Formset = generic_inlineformset_factory(TaggedItem, TaggedItemForm)
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form = Formset().forms[0]
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self.assertTrue(isinstance(form['tag'].field.widget, CustomWidget))
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