138 lines
4.8 KiB
Python
138 lines
4.8 KiB
Python
from django.core.exceptions import FieldError
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from django.test import TestCase
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from .models import (
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Entry,
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Line,
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Post,
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RegressionModelSplit,
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SelfRefer,
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SelfReferChild,
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SelfReferChildSibling,
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Tag,
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TagCollection,
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Worksheet,
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)
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class M2MRegressionTests(TestCase):
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def test_multiple_m2m(self):
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# Multiple m2m references to model must be distinguished when
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# accessing the relations through an instance attribute.
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s1 = SelfRefer.objects.create(name="s1")
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s2 = SelfRefer.objects.create(name="s2")
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s3 = SelfRefer.objects.create(name="s3")
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s1.references.add(s2)
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s1.related.add(s3)
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e1 = Entry.objects.create(name="e1")
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t1 = Tag.objects.create(name="t1")
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t2 = Tag.objects.create(name="t2")
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e1.topics.add(t1)
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e1.related.add(t2)
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self.assertSequenceEqual(s1.references.all(), [s2])
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self.assertSequenceEqual(s1.related.all(), [s3])
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self.assertSequenceEqual(e1.topics.all(), [t1])
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self.assertSequenceEqual(e1.related.all(), [t2])
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def test_m2m_managers_reused(self):
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s1 = SelfRefer.objects.create(name="s1")
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e1 = Entry.objects.create(name="e1")
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self.assertIs(s1.references, s1.references)
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self.assertIs(s1.related, s1.related)
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self.assertIs(e1.topics, e1.topics)
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self.assertIs(e1.related, e1.related)
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def test_internal_related_name_not_in_error_msg(self):
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# The secret internal related names for self-referential many-to-many
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# fields shouldn't appear in the list when an error is made.
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msg = (
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"Choices are: id, name, references, related, selfreferchild, "
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"selfreferchildsibling"
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)
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with self.assertRaisesMessage(FieldError, msg):
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SelfRefer.objects.filter(porcupine="fred")
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def test_m2m_inheritance_symmetry(self):
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# Test to ensure that the relationship between two inherited models
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# with a self-referential m2m field maintains symmetry
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sr_child = SelfReferChild(name="Hanna")
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sr_child.save()
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sr_sibling = SelfReferChildSibling(name="Beth")
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sr_sibling.save()
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sr_child.related.add(sr_sibling)
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self.assertSequenceEqual(sr_child.related.all(), [sr_sibling.selfrefer_ptr])
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self.assertSequenceEqual(sr_sibling.related.all(), [sr_child.selfrefer_ptr])
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def test_m2m_pk_field_type(self):
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# Regression for #11311 - The primary key for models in a m2m relation
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# doesn't have to be an AutoField
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w = Worksheet(id="abc")
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w.save()
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w.delete()
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def test_add_m2m_with_base_class(self):
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# Regression for #11956 -- You can add an object to a m2m with the
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# base class without causing integrity errors
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t1 = Tag.objects.create(name="t1")
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t2 = Tag.objects.create(name="t2")
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c1 = TagCollection.objects.create(name="c1")
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c1.tags.set([t1, t2])
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c1 = TagCollection.objects.get(name="c1")
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self.assertCountEqual(c1.tags.all(), [t1, t2])
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self.assertCountEqual(t1.tag_collections.all(), [c1])
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def test_manager_class_caching(self):
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e1 = Entry.objects.create()
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e2 = Entry.objects.create()
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t1 = Tag.objects.create()
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t2 = Tag.objects.create()
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# Get same manager twice in a row:
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self.assertIs(t1.entry_set.__class__, t1.entry_set.__class__)
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self.assertIs(e1.topics.__class__, e1.topics.__class__)
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# Get same manager for different instances
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self.assertIs(e1.topics.__class__, e2.topics.__class__)
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self.assertIs(t1.entry_set.__class__, t2.entry_set.__class__)
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def test_m2m_abstract_split(self):
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# Regression for #19236 - an abstract class with a 'split' method
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# causes a TypeError in add_lazy_relation
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m1 = RegressionModelSplit(name="1")
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m1.save()
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def test_assigning_invalid_data_to_m2m_doesnt_clear_existing_relations(self):
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t1 = Tag.objects.create(name="t1")
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t2 = Tag.objects.create(name="t2")
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c1 = TagCollection.objects.create(name="c1")
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c1.tags.set([t1, t2])
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with self.assertRaisesMessage(TypeError, "'int' object is not iterable"):
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c1.tags.set(7)
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c1.refresh_from_db()
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self.assertSequenceEqual(c1.tags.order_by("name"), [t1, t2])
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def test_multiple_forwards_only_m2m(self):
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# Regression for #24505 - Multiple ManyToManyFields to same "to"
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# model with related_name set to '+'.
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foo = Line.objects.create(name="foo")
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bar = Line.objects.create(name="bar")
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post = Post.objects.create()
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post.primary_lines.add(foo)
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post.secondary_lines.add(bar)
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self.assertSequenceEqual(post.primary_lines.all(), [foo])
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self.assertSequenceEqual(post.secondary_lines.all(), [bar])
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