mirror of https://github.com/django/django.git
[1.8.x] Added tests for get_related_models_recursive
Backport of d538e37e1b from master
This commit is contained in:
Markus Holtermann
parent
a1ba462793
commit
b7cf99a8c3
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@ -2,9 +2,9 @@ from django.apps.registry import Apps
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from django.db import models
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from django.db.migrations.operations import DeleteModel, RemoveField
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from django.db.migrations.state import (
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InvalidBasesError, ModelState, ProjectState,
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InvalidBasesError, ModelState, ProjectState, get_related_models_recursive,
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)
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from django.test import TestCase
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from django.test import SimpleTestCase, TestCase
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from .models import (
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FoodManager, FoodQuerySet, ModelWithCustomBase, NoMigrationFoodManager,
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@ -627,3 +627,224 @@ class ModelStateTests(TestCase):
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project_state.add_model(state)
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with self.assertRaisesMessage(InvalidBasesError, "Cannot resolve bases for [<ModelState: 'app.Model'>]"):
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project_state.apps
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class RelatedModelsTests(SimpleTestCase):
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def setUp(self):
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self.apps = Apps(['migrations.related_models_app'])
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def create_model(self, name, foreign_keys=[], bases=(), abstract=False, proxy=False):
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test_name = 'related_models_app'
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assert not (abstract and proxy)
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meta_contents = {
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'abstract': abstract,
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'app_label': test_name,
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'apps': self.apps,
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'proxy': proxy,
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}
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meta = type(str("Meta"), tuple(), meta_contents)
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if not bases:
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bases = (models.Model,)
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body = {
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'Meta': meta,
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'__module__': "__fake__",
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}
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fname_base = fname = '%s_%%d' % name.lower()
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for i, fk in enumerate(foreign_keys, 1):
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fname = fname_base % i
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body[fname] = fk
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return type(name, bases, body)
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def assertRelated(self, model, needle):
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self.assertEqual(
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get_related_models_recursive(model),
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{(n._meta.app_label, n._meta.model_name) for n in needle},
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)
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def test_unrelated(self):
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A = self.create_model("A")
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B = self.create_model("B")
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self.assertRelated(A, [])
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self.assertRelated(B, [])
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def test_direct_fk(self):
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A = self.create_model("A", foreign_keys=[models.ForeignKey('B')])
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B = self.create_model("B")
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self.assertRelated(A, [B])
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self.assertRelated(B, [A])
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def test_direct_hidden_fk(self):
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A = self.create_model("A", foreign_keys=[models.ForeignKey('B', related_name='+')])
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B = self.create_model("B")
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self.assertRelated(A, [B])
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self.assertRelated(B, [A])
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def test_nested_fk(self):
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A = self.create_model("A", foreign_keys=[models.ForeignKey('B')])
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B = self.create_model("B", foreign_keys=[models.ForeignKey('C')])
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C = self.create_model("C")
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self.assertRelated(A, [B, C])
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self.assertRelated(B, [A, C])
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self.assertRelated(C, [A, B])
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def test_two_sided(self):
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A = self.create_model("A", foreign_keys=[models.ForeignKey('B')])
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B = self.create_model("B", foreign_keys=[models.ForeignKey('A')])
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self.assertRelated(A, [B])
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self.assertRelated(B, [A])
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def test_circle(self):
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A = self.create_model("A", foreign_keys=[models.ForeignKey('B')])
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B = self.create_model("B", foreign_keys=[models.ForeignKey('C')])
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C = self.create_model("C", foreign_keys=[models.ForeignKey('A')])
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self.assertRelated(A, [B, C])
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self.assertRelated(B, [A, C])
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self.assertRelated(C, [A, B])
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def test_base(self):
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A = self.create_model("A")
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B = self.create_model("B", bases=(A,))
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self.assertRelated(A, [B])
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self.assertRelated(B, [A])
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def test_nested_base(self):
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A = self.create_model("A")
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B = self.create_model("B", bases=(A,))
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C = self.create_model("C", bases=(B,))
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self.assertRelated(A, [B, C])
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self.assertRelated(B, [A, C])
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self.assertRelated(C, [A, B])
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def test_multiple_bases(self):
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A = self.create_model("A")
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B = self.create_model("B")
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C = self.create_model("C", bases=(A, B,))
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self.assertRelated(A, [B, C])
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self.assertRelated(B, [A, C])
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self.assertRelated(C, [A, B])
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def test_multiple_nested_bases(self):
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A = self.create_model("A")
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B = self.create_model("B")
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C = self.create_model("C", bases=(A, B,))
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D = self.create_model("D")
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E = self.create_model("E", bases=(D,))
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F = self.create_model("F", bases=(C, E,))
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Y = self.create_model("Y")
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Z = self.create_model("Z", bases=(Y,))
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self.assertRelated(A, [B, C, D, E, F])
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self.assertRelated(B, [A, C, D, E, F])
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self.assertRelated(C, [A, B, D, E, F])
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self.assertRelated(D, [A, B, C, E, F])
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self.assertRelated(E, [A, B, C, D, F])
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self.assertRelated(F, [A, B, C, D, E])
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self.assertRelated(Y, [Z])
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self.assertRelated(Z, [Y])
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def test_base_to_base_fk(self):
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A = self.create_model("A", foreign_keys=[models.ForeignKey('Y')])
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B = self.create_model("B", bases=(A,))
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Y = self.create_model("Y")
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Z = self.create_model("Z", bases=(Y,))
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self.assertRelated(A, [B, Y, Z])
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self.assertRelated(B, [A, Y, Z])
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self.assertRelated(Y, [A, B, Z])
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self.assertRelated(Z, [A, B, Y])
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def test_base_to_subclass_fk(self):
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A = self.create_model("A", foreign_keys=[models.ForeignKey('Z')])
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B = self.create_model("B", bases=(A,))
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Y = self.create_model("Y")
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Z = self.create_model("Z", bases=(Y,))
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self.assertRelated(A, [B, Y, Z])
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self.assertRelated(B, [A, Y, Z])
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self.assertRelated(Y, [A, B, Z])
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self.assertRelated(Z, [A, B, Y])
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def test_direct_m2m(self):
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A = self.create_model("A", foreign_keys=[models.ManyToManyField('B')])
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B = self.create_model("B")
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self.assertRelated(A, [A.a_1.rel.through, B])
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self.assertRelated(B, [A, A.a_1.rel.through])
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def test_direct_m2m_self(self):
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A = self.create_model("A", foreign_keys=[models.ManyToManyField('A')])
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self.assertRelated(A, [A.a_1.rel.through])
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def test_intermediate_m2m_self(self):
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A = self.create_model("A", foreign_keys=[models.ManyToManyField('A', through='T')])
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T = self.create_model("T", foreign_keys=[models.ForeignKey('A'), models.ForeignKey('A')])
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self.assertRelated(A, [T])
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self.assertRelated(T, [A])
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def test_intermediate_m2m(self):
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A = self.create_model("A", foreign_keys=[models.ManyToManyField('B', through='T')])
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B = self.create_model("B")
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T = self.create_model("T", foreign_keys=[models.ForeignKey('A'), models.ForeignKey('B')])
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self.assertRelated(A, [B, T])
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self.assertRelated(B, [A, T])
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self.assertRelated(T, [A, B])
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def test_intermediate_m2m_extern_fk(self):
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A = self.create_model("A", foreign_keys=[models.ManyToManyField('B', through='T')])
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B = self.create_model("B")
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Z = self.create_model("Z")
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T = self.create_model("T", foreign_keys=[
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models.ForeignKey('A'), models.ForeignKey('B'), models.ForeignKey('Z'),
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])
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self.assertRelated(A, [B, T, Z])
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self.assertRelated(B, [A, T, Z])
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self.assertRelated(T, [A, B, Z])
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self.assertRelated(Z, [A, B, T])
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def test_intermediate_m2m_base(self):
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A = self.create_model("A", foreign_keys=[models.ManyToManyField('B', through='T')])
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B = self.create_model("B")
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S = self.create_model("S")
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T = self.create_model("T", foreign_keys=[models.ForeignKey('A'), models.ForeignKey('B')], bases=(S,))
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self.assertRelated(A, [B, S, T])
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self.assertRelated(B, [A, S, T])
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self.assertRelated(S, [A, B, T])
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self.assertRelated(T, [A, B, S])
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def test_abstract_base(self):
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A = self.create_model("A", abstract=True)
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B = self.create_model("B", bases=(A,))
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self.assertRelated(A, [B])
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self.assertRelated(B, [])
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def test_nested_abstract_base(self):
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A = self.create_model("A", abstract=True)
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B = self.create_model("B", bases=(A,), abstract=True)
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C = self.create_model("C", bases=(B,))
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self.assertRelated(A, [B, C])
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self.assertRelated(B, [C])
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self.assertRelated(C, [])
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def test_proxy_base(self):
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A = self.create_model("A")
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B = self.create_model("B", bases=(A,), proxy=True)
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self.assertRelated(A, [B])
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self.assertRelated(B, [])
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def test_nested_proxy_base(self):
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A = self.create_model("A")
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B = self.create_model("B", bases=(A,), proxy=True)
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C = self.create_model("C", bases=(B,), proxy=True)
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self.assertRelated(A, [B, C])
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self.assertRelated(B, [C])
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self.assertRelated(C, [])
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def test_multiple_mixed_bases(self):
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A = self.create_model("A", abstract=True)
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M = self.create_model("M")
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P = self.create_model("P")
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Q = self.create_model("Q", bases=(P,), proxy=True)
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Z = self.create_model("Z", bases=(A, M, Q))
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# M has a pointer O2O field p_ptr to P
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self.assertRelated(A, [M, P, Q, Z])
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self.assertRelated(M, [P, Q, Z])
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self.assertRelated(P, [M, Q, Z])
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self.assertRelated(Q, [M, P, Z])
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self.assertRelated(Z, [M, P, Q])
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