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2059 lines
74 KiB
Python
2059 lines
74 KiB
Python
from unittest import mock
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from django.core.checks import Error
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from django.core.checks import Warning as DjangoWarning
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from django.db import connection, models
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from django.test.testcases import SimpleTestCase
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from django.test.utils import isolate_apps, modify_settings, override_settings
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@isolate_apps("invalid_models_tests")
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class RelativeFieldTests(SimpleTestCase):
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def test_valid_foreign_key_without_accessor(self):
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class Target(models.Model):
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# There would be a clash if Model.field installed an accessor.
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model = models.IntegerField()
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class Model(models.Model):
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field = models.ForeignKey(Target, models.CASCADE, related_name="+")
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field = Model._meta.get_field("field")
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self.assertEqual(field.check(), [])
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def test_foreign_key_to_missing_model(self):
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# Model names are resolved when a model is being created, so we cannot
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# test relative fields in isolation and we need to attach them to a
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# model.
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class Model(models.Model):
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foreign_key = models.ForeignKey("Rel1", models.CASCADE)
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field = Model._meta.get_field("foreign_key")
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self.assertEqual(
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field.check(),
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[
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Error(
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"Field defines a relation with model 'Rel1', "
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"which is either not installed, or is abstract.",
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obj=field,
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id="fields.E300",
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),
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],
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)
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@isolate_apps("invalid_models_tests")
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def test_foreign_key_to_isolate_apps_model(self):
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"""
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#25723 - Referenced model registration lookup should be run against the
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field's model registry.
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"""
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class OtherModel(models.Model):
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pass
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class Model(models.Model):
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foreign_key = models.ForeignKey("OtherModel", models.CASCADE)
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field = Model._meta.get_field("foreign_key")
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self.assertEqual(field.check(from_model=Model), [])
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def test_many_to_many_to_missing_model(self):
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class Model(models.Model):
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m2m = models.ManyToManyField("Rel2")
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field = Model._meta.get_field("m2m")
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self.assertEqual(
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field.check(from_model=Model),
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[
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Error(
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"Field defines a relation with model 'Rel2', "
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"which is either not installed, or is abstract.",
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obj=field,
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id="fields.E300",
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),
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],
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)
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@isolate_apps("invalid_models_tests")
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def test_many_to_many_to_isolate_apps_model(self):
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"""
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#25723 - Referenced model registration lookup should be run against the
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field's model registry.
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"""
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class OtherModel(models.Model):
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pass
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class Model(models.Model):
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m2m = models.ManyToManyField("OtherModel")
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field = Model._meta.get_field("m2m")
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self.assertEqual(field.check(from_model=Model), [])
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@isolate_apps("invalid_models_tests")
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def test_auto_created_through_model(self):
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class OtherModel(models.Model):
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pass
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class M2MModel(models.Model):
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many_to_many_rel = models.ManyToManyField(OtherModel)
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class O2OModel(models.Model):
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one_to_one_rel = models.OneToOneField(
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"invalid_models_tests.M2MModel_many_to_many_rel",
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on_delete=models.CASCADE,
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)
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field = O2OModel._meta.get_field("one_to_one_rel")
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self.assertEqual(field.check(from_model=O2OModel), [])
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def test_many_to_many_with_useless_options(self):
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class Model(models.Model):
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name = models.CharField(max_length=20)
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class ModelM2M(models.Model):
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m2m = models.ManyToManyField(
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Model, null=True, validators=[lambda x: x], db_comment="Column comment"
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)
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field = ModelM2M._meta.get_field("m2m")
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self.assertEqual(
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ModelM2M.check(),
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[
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DjangoWarning(
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"null has no effect on ManyToManyField.",
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obj=field,
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id="fields.W340",
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),
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DjangoWarning(
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"ManyToManyField does not support validators.",
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obj=field,
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id="fields.W341",
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),
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DjangoWarning(
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"db_comment has no effect on ManyToManyField.",
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obj=field,
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id="fields.W346",
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),
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],
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)
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def test_many_to_many_with_useless_related_name(self):
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class ModelM2M(models.Model):
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m2m = models.ManyToManyField("self", related_name="children")
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field = ModelM2M._meta.get_field("m2m")
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self.assertEqual(
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ModelM2M.check(),
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[
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DjangoWarning(
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"related_name has no effect on ManyToManyField with "
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'a symmetrical relationship, e.g. to "self".',
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obj=field,
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id="fields.W345",
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),
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],
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)
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def test_ambiguous_relationship_model_from(self):
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class Person(models.Model):
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pass
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class Group(models.Model):
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field = models.ManyToManyField("Person", through="AmbiguousRelationship")
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class AmbiguousRelationship(models.Model):
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person = models.ForeignKey(Person, models.CASCADE)
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first_group = models.ForeignKey(Group, models.CASCADE, related_name="first")
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second_group = models.ForeignKey(
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Group, models.CASCADE, related_name="second"
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)
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field = Group._meta.get_field("field")
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self.assertEqual(
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field.check(from_model=Group),
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[
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Error(
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"The model is used as an intermediate model by "
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"'invalid_models_tests.Group.field', but it has more than one "
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"foreign key from 'Group', which is ambiguous. You must "
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"specify which foreign key Django should use via the "
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"through_fields keyword argument.",
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hint=(
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"If you want to create a recursive relationship, use "
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'ManyToManyField("self", through="AmbiguousRelationship").'
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),
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obj=field,
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id="fields.E334",
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),
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],
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)
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def test_ambiguous_relationship_model_to(self):
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class Person(models.Model):
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pass
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class Group(models.Model):
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field = models.ManyToManyField(
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"Person", through="AmbiguousRelationship", related_name="tertiary"
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)
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class AmbiguousRelationship(models.Model):
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# Too much foreign keys to Person.
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first_person = models.ForeignKey(
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Person, models.CASCADE, related_name="first"
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)
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second_person = models.ForeignKey(
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Person, models.CASCADE, related_name="second"
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)
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second_model = models.ForeignKey(Group, models.CASCADE)
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field = Group._meta.get_field("field")
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self.assertEqual(
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field.check(from_model=Group),
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[
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Error(
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"The model is used as an intermediate model by "
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"'invalid_models_tests.Group.field', but it has more than one "
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"foreign key to 'Person', which is ambiguous. You must specify "
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"which foreign key Django should use via the through_fields "
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"keyword argument.",
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hint=(
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"If you want to create a recursive relationship, use "
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'ManyToManyField("self", through="AmbiguousRelationship").'
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),
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obj=field,
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id="fields.E335",
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),
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],
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)
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def test_relationship_model_with_foreign_key_to_wrong_model(self):
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class WrongModel(models.Model):
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pass
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class Person(models.Model):
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pass
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class Group(models.Model):
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members = models.ManyToManyField("Person", through="InvalidRelationship")
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class InvalidRelationship(models.Model):
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person = models.ForeignKey(Person, models.CASCADE)
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wrong_foreign_key = models.ForeignKey(WrongModel, models.CASCADE)
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# The last foreign key should point to Group model.
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field = Group._meta.get_field("members")
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self.assertEqual(
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field.check(from_model=Group),
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[
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Error(
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"The model is used as an intermediate model by "
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"'invalid_models_tests.Group.members', but it does not "
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"have a foreign key to 'Group' or 'Person'.",
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obj=InvalidRelationship,
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id="fields.E336",
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),
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],
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)
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def test_relationship_model_missing_foreign_key(self):
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class Person(models.Model):
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pass
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class Group(models.Model):
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members = models.ManyToManyField("Person", through="InvalidRelationship")
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class InvalidRelationship(models.Model):
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group = models.ForeignKey(Group, models.CASCADE)
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# No foreign key to Person
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field = Group._meta.get_field("members")
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self.assertEqual(
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field.check(from_model=Group),
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[
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Error(
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"The model is used as an intermediate model by "
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"'invalid_models_tests.Group.members', but it does not have "
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"a foreign key to 'Group' or 'Person'.",
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obj=InvalidRelationship,
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id="fields.E336",
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),
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],
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)
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def test_missing_relationship_model(self):
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class Person(models.Model):
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pass
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class Group(models.Model):
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members = models.ManyToManyField("Person", through="MissingM2MModel")
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field = Group._meta.get_field("members")
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self.assertEqual(
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field.check(from_model=Group),
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[
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Error(
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"Field specifies a many-to-many relation through model "
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"'MissingM2MModel', which has not been installed.",
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obj=field,
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id="fields.E331",
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),
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],
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)
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def test_missing_relationship_model_on_model_check(self):
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class Person(models.Model):
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pass
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class Group(models.Model):
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members = models.ManyToManyField("Person", through="MissingM2MModel")
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self.assertEqual(
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Group.check(),
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[
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Error(
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"Field specifies a many-to-many relation through model "
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"'MissingM2MModel', which has not been installed.",
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obj=Group._meta.get_field("members"),
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id="fields.E331",
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),
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],
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)
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@isolate_apps("invalid_models_tests")
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def test_many_to_many_through_isolate_apps_model(self):
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"""
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#25723 - Through model registration lookup should be run against the
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field's model registry.
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"""
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class GroupMember(models.Model):
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person = models.ForeignKey("Person", models.CASCADE)
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group = models.ForeignKey("Group", models.CASCADE)
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class Person(models.Model):
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pass
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class Group(models.Model):
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members = models.ManyToManyField("Person", through="GroupMember")
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field = Group._meta.get_field("members")
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self.assertEqual(field.check(from_model=Group), [])
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def test_too_many_foreign_keys_in_self_referential_model(self):
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class Person(models.Model):
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friends = models.ManyToManyField(
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"self", through="InvalidRelationship", symmetrical=False
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)
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class InvalidRelationship(models.Model):
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first = models.ForeignKey(
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Person, models.CASCADE, related_name="rel_from_set_2"
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)
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second = models.ForeignKey(
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Person, models.CASCADE, related_name="rel_to_set_2"
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)
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third = models.ForeignKey(
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Person, models.CASCADE, related_name="too_many_by_far"
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)
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field = Person._meta.get_field("friends")
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self.assertEqual(
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field.check(from_model=Person),
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[
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Error(
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"The model is used as an intermediate model by "
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"'invalid_models_tests.Person.friends', but it has more than two "
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"foreign keys to 'Person', which is ambiguous. You must specify "
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"which two foreign keys Django should use via the through_fields "
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"keyword argument.",
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hint=(
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"Use through_fields to specify which two foreign keys Django "
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"should use."
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),
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obj=InvalidRelationship,
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id="fields.E333",
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),
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],
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)
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def test_foreign_key_to_abstract_model(self):
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class AbstractModel(models.Model):
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class Meta:
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abstract = True
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class Model(models.Model):
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rel_string_foreign_key = models.ForeignKey("AbstractModel", models.CASCADE)
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rel_class_foreign_key = models.ForeignKey(AbstractModel, models.CASCADE)
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fields = [
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Model._meta.get_field("rel_string_foreign_key"),
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Model._meta.get_field("rel_class_foreign_key"),
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]
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expected_error = Error(
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"Field defines a relation with model 'AbstractModel', "
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"which is either not installed, or is abstract.",
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id="fields.E300",
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)
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for field in fields:
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expected_error.obj = field
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self.assertEqual(field.check(), [expected_error])
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def test_m2m_to_abstract_model(self):
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class AbstractModel(models.Model):
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class Meta:
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abstract = True
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class Model(models.Model):
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rel_string_m2m = models.ManyToManyField("AbstractModel")
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rel_class_m2m = models.ManyToManyField(AbstractModel)
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fields = [
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Model._meta.get_field("rel_string_m2m"),
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Model._meta.get_field("rel_class_m2m"),
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]
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expected_error = Error(
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"Field defines a relation with model 'AbstractModel', "
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"which is either not installed, or is abstract.",
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id="fields.E300",
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)
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for field in fields:
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expected_error.obj = field
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self.assertEqual(field.check(from_model=Model), [expected_error])
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def test_unique_m2m(self):
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class Person(models.Model):
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name = models.CharField(max_length=5)
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class Group(models.Model):
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members = models.ManyToManyField("Person", unique=True)
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field = Group._meta.get_field("members")
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self.assertEqual(
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field.check(from_model=Group),
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[
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Error(
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||
"ManyToManyFields cannot be unique.",
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obj=field,
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id="fields.E330",
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),
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],
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)
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def test_foreign_key_to_non_unique_field(self):
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class Target(models.Model):
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bad = models.IntegerField() # No unique=True
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class Model(models.Model):
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foreign_key = models.ForeignKey("Target", models.CASCADE, to_field="bad")
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field = Model._meta.get_field("foreign_key")
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self.assertEqual(
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field.check(),
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[
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||
Error(
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||
"'Target.bad' must be unique because it is referenced by a foreign "
|
||
"key.",
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||
hint=(
|
||
"Add unique=True to this field or add a UniqueConstraint "
|
||
"(without condition) in the model Meta.constraints."
|
||
),
|
||
obj=field,
|
||
id="fields.E311",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_foreign_key_to_non_unique_field_under_explicit_model(self):
|
||
class Target(models.Model):
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||
bad = models.IntegerField()
|
||
|
||
class Model(models.Model):
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||
field = models.ForeignKey(Target, models.CASCADE, to_field="bad")
|
||
|
||
field = Model._meta.get_field("field")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"'Target.bad' must be unique because it is referenced by a foreign "
|
||
"key.",
|
||
hint=(
|
||
"Add unique=True to this field or add a UniqueConstraint "
|
||
"(without condition) in the model Meta.constraints."
|
||
),
|
||
obj=field,
|
||
id="fields.E311",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_foreign_key_to_partially_unique_field(self):
|
||
class Target(models.Model):
|
||
source = models.IntegerField()
|
||
|
||
class Meta:
|
||
constraints = [
|
||
models.UniqueConstraint(
|
||
fields=["source"],
|
||
name="tfktpuf_partial_unique",
|
||
condition=models.Q(pk__gt=2),
|
||
),
|
||
]
|
||
|
||
class Model(models.Model):
|
||
field = models.ForeignKey(Target, models.CASCADE, to_field="source")
|
||
|
||
field = Model._meta.get_field("field")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"'Target.source' must be unique because it is referenced by a "
|
||
"foreign key.",
|
||
hint=(
|
||
"Add unique=True to this field or add a UniqueConstraint "
|
||
"(without condition) in the model Meta.constraints."
|
||
),
|
||
obj=field,
|
||
id="fields.E311",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_foreign_key_to_unique_field_with_meta_constraint(self):
|
||
class Target(models.Model):
|
||
source = models.IntegerField()
|
||
|
||
class Meta:
|
||
constraints = [
|
||
models.UniqueConstraint(
|
||
fields=["source"],
|
||
name="tfktufwmc_unique",
|
||
),
|
||
]
|
||
|
||
class Model(models.Model):
|
||
field = models.ForeignKey(Target, models.CASCADE, to_field="source")
|
||
|
||
field = Model._meta.get_field("field")
|
||
self.assertEqual(field.check(), [])
|
||
|
||
def test_foreign_object_to_non_unique_fields(self):
|
||
class Person(models.Model):
|
||
# Note that both fields are not unique.
|
||
country_id = models.IntegerField()
|
||
city_id = models.IntegerField()
|
||
|
||
class MMembership(models.Model):
|
||
person_country_id = models.IntegerField()
|
||
person_city_id = models.IntegerField()
|
||
|
||
person = models.ForeignObject(
|
||
Person,
|
||
on_delete=models.CASCADE,
|
||
from_fields=["person_country_id", "person_city_id"],
|
||
to_fields=["country_id", "city_id"],
|
||
)
|
||
|
||
field = MMembership._meta.get_field("person")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"No subset of the fields 'country_id', 'city_id' on model 'Person' "
|
||
"is unique.",
|
||
hint=(
|
||
"Mark a single field as unique=True or add a set of "
|
||
"fields to a unique constraint (via unique_together or a "
|
||
"UniqueConstraint (without condition) in the model "
|
||
"Meta.constraints)."
|
||
),
|
||
obj=field,
|
||
id="fields.E310",
|
||
)
|
||
],
|
||
)
|
||
|
||
def test_foreign_object_to_partially_unique_field(self):
|
||
class Person(models.Model):
|
||
country_id = models.IntegerField()
|
||
city_id = models.IntegerField()
|
||
|
||
class Meta:
|
||
constraints = [
|
||
models.UniqueConstraint(
|
||
fields=["country_id", "city_id"],
|
||
name="tfotpuf_partial_unique",
|
||
condition=models.Q(pk__gt=2),
|
||
),
|
||
]
|
||
|
||
class MMembership(models.Model):
|
||
person_country_id = models.IntegerField()
|
||
person_city_id = models.IntegerField()
|
||
person = models.ForeignObject(
|
||
Person,
|
||
on_delete=models.CASCADE,
|
||
from_fields=["person_country_id", "person_city_id"],
|
||
to_fields=["country_id", "city_id"],
|
||
)
|
||
|
||
field = MMembership._meta.get_field("person")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"No subset of the fields 'country_id', 'city_id' on model "
|
||
"'Person' is unique.",
|
||
hint=(
|
||
"Mark a single field as unique=True or add a set of "
|
||
"fields to a unique constraint (via unique_together or a "
|
||
"UniqueConstraint (without condition) in the model "
|
||
"Meta.constraints)."
|
||
),
|
||
obj=field,
|
||
id="fields.E310",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_foreign_object_to_unique_field_with_meta_constraint(self):
|
||
class Person(models.Model):
|
||
country_id = models.IntegerField()
|
||
city_id = models.IntegerField()
|
||
|
||
class Meta:
|
||
constraints = [
|
||
models.UniqueConstraint(
|
||
fields=["country_id", "city_id"],
|
||
name="tfotpuf_unique",
|
||
),
|
||
]
|
||
|
||
class MMembership(models.Model):
|
||
person_country_id = models.IntegerField()
|
||
person_city_id = models.IntegerField()
|
||
person = models.ForeignObject(
|
||
Person,
|
||
on_delete=models.CASCADE,
|
||
from_fields=["person_country_id", "person_city_id"],
|
||
to_fields=["country_id", "city_id"],
|
||
)
|
||
|
||
field = MMembership._meta.get_field("person")
|
||
self.assertEqual(field.check(), [])
|
||
|
||
def test_on_delete_set_null_on_non_nullable_field(self):
|
||
class Person(models.Model):
|
||
pass
|
||
|
||
class Model(models.Model):
|
||
foreign_key = models.ForeignKey("Person", models.SET_NULL)
|
||
|
||
field = Model._meta.get_field("foreign_key")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"Field specifies on_delete=SET_NULL, but cannot be null.",
|
||
hint=(
|
||
"Set null=True argument on the field, or change the on_delete "
|
||
"rule."
|
||
),
|
||
obj=field,
|
||
id="fields.E320",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_on_delete_set_default_without_default_value(self):
|
||
class Person(models.Model):
|
||
pass
|
||
|
||
class Model(models.Model):
|
||
foreign_key = models.ForeignKey("Person", models.SET_DEFAULT)
|
||
|
||
field = Model._meta.get_field("foreign_key")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"Field specifies on_delete=SET_DEFAULT, but has no default value.",
|
||
hint="Set a default value, or change the on_delete rule.",
|
||
obj=field,
|
||
id="fields.E321",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_nullable_primary_key(self):
|
||
class Model(models.Model):
|
||
field = models.IntegerField(primary_key=True, null=True)
|
||
|
||
field = Model._meta.get_field("field")
|
||
with mock.patch.object(
|
||
connection.features, "interprets_empty_strings_as_nulls", False
|
||
):
|
||
results = field.check()
|
||
self.assertEqual(
|
||
results,
|
||
[
|
||
Error(
|
||
"Primary keys must not have null=True.",
|
||
hint=(
|
||
"Set null=False on the field, or remove primary_key=True "
|
||
"argument."
|
||
),
|
||
obj=field,
|
||
id="fields.E007",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_not_swapped_model(self):
|
||
class SwappableModel(models.Model):
|
||
# A model that can be, but isn't swapped out. References to this
|
||
# model should *not* raise any validation error.
|
||
class Meta:
|
||
swappable = "TEST_SWAPPABLE_MODEL"
|
||
|
||
class Model(models.Model):
|
||
explicit_fk = models.ForeignKey(
|
||
SwappableModel,
|
||
models.CASCADE,
|
||
related_name="explicit_fk",
|
||
)
|
||
implicit_fk = models.ForeignKey(
|
||
"invalid_models_tests.SwappableModel",
|
||
models.CASCADE,
|
||
related_name="implicit_fk",
|
||
)
|
||
explicit_m2m = models.ManyToManyField(
|
||
SwappableModel, related_name="explicit_m2m"
|
||
)
|
||
implicit_m2m = models.ManyToManyField(
|
||
"invalid_models_tests.SwappableModel",
|
||
related_name="implicit_m2m",
|
||
)
|
||
|
||
explicit_fk = Model._meta.get_field("explicit_fk")
|
||
self.assertEqual(explicit_fk.check(), [])
|
||
|
||
implicit_fk = Model._meta.get_field("implicit_fk")
|
||
self.assertEqual(implicit_fk.check(), [])
|
||
|
||
explicit_m2m = Model._meta.get_field("explicit_m2m")
|
||
self.assertEqual(explicit_m2m.check(from_model=Model), [])
|
||
|
||
implicit_m2m = Model._meta.get_field("implicit_m2m")
|
||
self.assertEqual(implicit_m2m.check(from_model=Model), [])
|
||
|
||
@override_settings(TEST_SWAPPED_MODEL="invalid_models_tests.Replacement")
|
||
def test_referencing_to_swapped_model(self):
|
||
class Replacement(models.Model):
|
||
pass
|
||
|
||
class SwappedModel(models.Model):
|
||
class Meta:
|
||
swappable = "TEST_SWAPPED_MODEL"
|
||
|
||
class Model(models.Model):
|
||
explicit_fk = models.ForeignKey(
|
||
SwappedModel,
|
||
models.CASCADE,
|
||
related_name="explicit_fk",
|
||
)
|
||
implicit_fk = models.ForeignKey(
|
||
"invalid_models_tests.SwappedModel",
|
||
models.CASCADE,
|
||
related_name="implicit_fk",
|
||
)
|
||
explicit_m2m = models.ManyToManyField(
|
||
SwappedModel, related_name="explicit_m2m"
|
||
)
|
||
implicit_m2m = models.ManyToManyField(
|
||
"invalid_models_tests.SwappedModel",
|
||
related_name="implicit_m2m",
|
||
)
|
||
|
||
fields = [
|
||
Model._meta.get_field("explicit_fk"),
|
||
Model._meta.get_field("implicit_fk"),
|
||
Model._meta.get_field("explicit_m2m"),
|
||
Model._meta.get_field("implicit_m2m"),
|
||
]
|
||
|
||
expected_error = Error(
|
||
(
|
||
"Field defines a relation with the model "
|
||
"'invalid_models_tests.SwappedModel', which has been swapped out."
|
||
),
|
||
hint="Update the relation to point at 'settings.TEST_SWAPPED_MODEL'.",
|
||
id="fields.E301",
|
||
)
|
||
|
||
for field in fields:
|
||
expected_error.obj = field
|
||
self.assertEqual(field.check(from_model=Model), [expected_error])
|
||
|
||
def test_related_field_has_invalid_related_name(self):
|
||
digit = 0
|
||
illegal_non_alphanumeric = "!"
|
||
whitespace = "\t"
|
||
|
||
invalid_related_names = [
|
||
"%s_begins_with_digit" % digit,
|
||
"%s_begins_with_illegal_non_alphanumeric" % illegal_non_alphanumeric,
|
||
"%s_begins_with_whitespace" % whitespace,
|
||
"contains_%s_illegal_non_alphanumeric" % illegal_non_alphanumeric,
|
||
"contains_%s_whitespace" % whitespace,
|
||
"ends_with_with_illegal_non_alphanumeric_%s" % illegal_non_alphanumeric,
|
||
"ends_with_whitespace_%s" % whitespace,
|
||
"with", # a Python keyword
|
||
"related_name\n",
|
||
"",
|
||
"，", # non-ASCII
|
||
]
|
||
|
||
class Parent(models.Model):
|
||
pass
|
||
|
||
for invalid_related_name in invalid_related_names:
|
||
Child = type(
|
||
"Child%s" % invalid_related_name,
|
||
(models.Model,),
|
||
{
|
||
"parent": models.ForeignKey(
|
||
"Parent", models.CASCADE, related_name=invalid_related_name
|
||
),
|
||
"__module__": Parent.__module__,
|
||
},
|
||
)
|
||
|
||
field = Child._meta.get_field("parent")
|
||
self.assertEqual(
|
||
Child.check(),
|
||
[
|
||
Error(
|
||
"The name '%s' is invalid related_name for field Child%s.parent"
|
||
% (invalid_related_name, invalid_related_name),
|
||
hint=(
|
||
"Related name must be a valid Python identifier or end "
|
||
"with a '+'"
|
||
),
|
||
obj=field,
|
||
id="fields.E306",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_related_field_has_valid_related_name(self):
|
||
lowercase = "a"
|
||
uppercase = "A"
|
||
digit = 0
|
||
|
||
related_names = [
|
||
"%s_starts_with_lowercase" % lowercase,
|
||
"%s_tarts_with_uppercase" % uppercase,
|
||
"_starts_with_underscore",
|
||
"contains_%s_digit" % digit,
|
||
"ends_with_plus+",
|
||
"_+",
|
||
"+",
|
||
"試",
|
||
"試驗+",
|
||
]
|
||
|
||
class Parent(models.Model):
|
||
pass
|
||
|
||
for related_name in related_names:
|
||
Child = type(
|
||
"Child%s" % related_name,
|
||
(models.Model,),
|
||
{
|
||
"parent": models.ForeignKey(
|
||
"Parent", models.CASCADE, related_name=related_name
|
||
),
|
||
"__module__": Parent.__module__,
|
||
},
|
||
)
|
||
self.assertEqual(Child.check(), [])
|
||
|
||
def test_to_fields_exist(self):
|
||
class Parent(models.Model):
|
||
pass
|
||
|
||
class Child(models.Model):
|
||
a = models.PositiveIntegerField()
|
||
b = models.PositiveIntegerField()
|
||
parent = models.ForeignObject(
|
||
Parent,
|
||
on_delete=models.SET_NULL,
|
||
from_fields=("a", "b"),
|
||
to_fields=("a", "b"),
|
||
)
|
||
|
||
field = Child._meta.get_field("parent")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"The to_field 'a' doesn't exist on the related model "
|
||
"'invalid_models_tests.Parent'.",
|
||
obj=field,
|
||
id="fields.E312",
|
||
),
|
||
Error(
|
||
"The to_field 'b' doesn't exist on the related model "
|
||
"'invalid_models_tests.Parent'.",
|
||
obj=field,
|
||
id="fields.E312",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_to_fields_not_checked_if_related_model_doesnt_exist(self):
|
||
class Child(models.Model):
|
||
a = models.PositiveIntegerField()
|
||
b = models.PositiveIntegerField()
|
||
parent = models.ForeignObject(
|
||
"invalid_models_tests.Parent",
|
||
on_delete=models.SET_NULL,
|
||
from_fields=("a", "b"),
|
||
to_fields=("a", "b"),
|
||
)
|
||
|
||
field = Child._meta.get_field("parent")
|
||
self.assertEqual(
|
||
field.check(),
|
||
[
|
||
Error(
|
||
"Field defines a relation with model "
|
||
"'invalid_models_tests.Parent', which is either not installed, or "
|
||
"is abstract.",
|
||
id="fields.E300",
|
||
obj=field,
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_invalid_related_query_name(self):
|
||
class Target(models.Model):
|
||
pass
|
||
|
||
class Model(models.Model):
|
||
first = models.ForeignKey(
|
||
Target, models.CASCADE, related_name="contains__double"
|
||
)
|
||
second = models.ForeignKey(
|
||
Target, models.CASCADE, related_query_name="ends_underscore_"
|
||
)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse query name 'contains__double' must not contain '__'.",
|
||
hint=(
|
||
"Add or change a related_name or related_query_name "
|
||
"argument for this field."
|
||
),
|
||
obj=Model._meta.get_field("first"),
|
||
id="fields.E309",
|
||
),
|
||
Error(
|
||
"Reverse query name 'ends_underscore_' must not end with an "
|
||
"underscore.",
|
||
hint=(
|
||
"Add or change a related_name or related_query_name "
|
||
"argument for this field."
|
||
),
|
||
obj=Model._meta.get_field("second"),
|
||
id="fields.E308",
|
||
),
|
||
],
|
||
)
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class AccessorClashTests(SimpleTestCase):
|
||
def test_fk_to_integer(self):
|
||
self._test_accessor_clash(
|
||
target=models.IntegerField(),
|
||
relative=models.ForeignKey("Target", models.CASCADE),
|
||
)
|
||
|
||
def test_fk_to_fk(self):
|
||
self._test_accessor_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ForeignKey("Target", models.CASCADE),
|
||
)
|
||
|
||
def test_fk_to_m2m(self):
|
||
self._test_accessor_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ForeignKey("Target", models.CASCADE),
|
||
)
|
||
|
||
def test_m2m_to_integer(self):
|
||
self._test_accessor_clash(
|
||
target=models.IntegerField(), relative=models.ManyToManyField("Target")
|
||
)
|
||
|
||
def test_m2m_to_fk(self):
|
||
self._test_accessor_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ManyToManyField("Target"),
|
||
)
|
||
|
||
def test_m2m_to_m2m(self):
|
||
self._test_accessor_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ManyToManyField("Target"),
|
||
)
|
||
|
||
def _test_accessor_clash(self, target, relative):
|
||
class Another(models.Model):
|
||
pass
|
||
|
||
class Target(models.Model):
|
||
model_set = target
|
||
|
||
class Model(models.Model):
|
||
rel = relative
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Target.model_set' for "
|
||
"'invalid_models_tests.Model.rel' clashes with field name "
|
||
"'invalid_models_tests.Target.model_set'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.model_set', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.rel'."
|
||
),
|
||
obj=Model._meta.get_field("rel"),
|
||
id="fields.E302",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_clash_between_accessors(self):
|
||
class Target(models.Model):
|
||
pass
|
||
|
||
class Model(models.Model):
|
||
foreign = models.ForeignKey(Target, models.CASCADE)
|
||
m2m = models.ManyToManyField(Target)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Target.model_set' for "
|
||
"'invalid_models_tests.Model.foreign' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.m2m'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.foreign' or "
|
||
"'invalid_models_tests.Model.m2m'."
|
||
),
|
||
obj=Model._meta.get_field("foreign"),
|
||
id="fields.E304",
|
||
),
|
||
Error(
|
||
"Reverse accessor 'Target.model_set' for "
|
||
"'invalid_models_tests.Model.m2m' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.foreign'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.m2m' or "
|
||
"'invalid_models_tests.Model.foreign'."
|
||
),
|
||
obj=Model._meta.get_field("m2m"),
|
||
id="fields.E304",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_m2m_to_m2m_with_inheritance(self):
|
||
"""Ref #22047."""
|
||
|
||
class Target(models.Model):
|
||
pass
|
||
|
||
class Model(models.Model):
|
||
children = models.ManyToManyField(
|
||
"Child", related_name="m2m_clash", related_query_name="no_clash"
|
||
)
|
||
|
||
class Parent(models.Model):
|
||
m2m_clash = models.ManyToManyField("Target")
|
||
|
||
class Child(Parent):
|
||
pass
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Child.m2m_clash' for "
|
||
"'invalid_models_tests.Model.children' clashes with field "
|
||
"name 'invalid_models_tests.Child.m2m_clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Child.m2m_clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.children'."
|
||
),
|
||
obj=Model._meta.get_field("children"),
|
||
id="fields.E302",
|
||
)
|
||
],
|
||
)
|
||
|
||
def test_no_clash_for_hidden_related_name(self):
|
||
class Stub(models.Model):
|
||
pass
|
||
|
||
class ManyToManyRel(models.Model):
|
||
thing1 = models.ManyToManyField(Stub, related_name="+")
|
||
thing2 = models.ManyToManyField(Stub, related_name="+")
|
||
|
||
class FKRel(models.Model):
|
||
thing1 = models.ForeignKey(Stub, models.CASCADE, related_name="+")
|
||
thing2 = models.ForeignKey(Stub, models.CASCADE, related_name="+")
|
||
|
||
self.assertEqual(ManyToManyRel.check(), [])
|
||
self.assertEqual(FKRel.check(), [])
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class ReverseQueryNameClashTests(SimpleTestCase):
|
||
def test_fk_to_integer(self):
|
||
self._test_reverse_query_name_clash(
|
||
target=models.IntegerField(),
|
||
relative=models.ForeignKey("Target", models.CASCADE),
|
||
)
|
||
|
||
def test_fk_to_fk(self):
|
||
self._test_reverse_query_name_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ForeignKey("Target", models.CASCADE),
|
||
)
|
||
|
||
def test_fk_to_m2m(self):
|
||
self._test_reverse_query_name_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ForeignKey("Target", models.CASCADE),
|
||
)
|
||
|
||
def test_m2m_to_integer(self):
|
||
self._test_reverse_query_name_clash(
|
||
target=models.IntegerField(), relative=models.ManyToManyField("Target")
|
||
)
|
||
|
||
def test_m2m_to_fk(self):
|
||
self._test_reverse_query_name_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ManyToManyField("Target"),
|
||
)
|
||
|
||
def test_m2m_to_m2m(self):
|
||
self._test_reverse_query_name_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ManyToManyField("Target"),
|
||
)
|
||
|
||
def _test_reverse_query_name_clash(self, target, relative):
|
||
class Another(models.Model):
|
||
pass
|
||
|
||
class Target(models.Model):
|
||
model = target
|
||
|
||
class Model(models.Model):
|
||
rel = relative
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.rel' "
|
||
"clashes with field name 'invalid_models_tests.Target.model'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.model', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.rel'."
|
||
),
|
||
obj=Model._meta.get_field("rel"),
|
||
id="fields.E303",
|
||
),
|
||
],
|
||
)
|
||
|
||
@modify_settings(INSTALLED_APPS={"append": "basic"})
|
||
@isolate_apps("basic", "invalid_models_tests")
|
||
def test_no_clash_across_apps_without_accessor(self):
|
||
class Target(models.Model):
|
||
class Meta:
|
||
app_label = "invalid_models_tests"
|
||
|
||
class Model(models.Model):
|
||
m2m = models.ManyToManyField(Target, related_name="+")
|
||
|
||
class Meta:
|
||
app_label = "basic"
|
||
|
||
def _test():
|
||
# Define model with the same name.
|
||
class Model(models.Model):
|
||
m2m = models.ManyToManyField(Target, related_name="+")
|
||
|
||
class Meta:
|
||
app_label = "invalid_models_tests"
|
||
|
||
self.assertEqual(Model.check(), [])
|
||
|
||
_test()
|
||
self.assertEqual(Model.check(), [])
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class ExplicitRelatedNameClashTests(SimpleTestCase):
|
||
def test_fk_to_integer(self):
|
||
self._test_explicit_related_name_clash(
|
||
target=models.IntegerField(),
|
||
relative=models.ForeignKey("Target", models.CASCADE, related_name="clash"),
|
||
)
|
||
|
||
def test_fk_to_fk(self):
|
||
self._test_explicit_related_name_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ForeignKey("Target", models.CASCADE, related_name="clash"),
|
||
)
|
||
|
||
def test_fk_to_m2m(self):
|
||
self._test_explicit_related_name_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ForeignKey("Target", models.CASCADE, related_name="clash"),
|
||
)
|
||
|
||
def test_m2m_to_integer(self):
|
||
self._test_explicit_related_name_clash(
|
||
target=models.IntegerField(),
|
||
relative=models.ManyToManyField("Target", related_name="clash"),
|
||
)
|
||
|
||
def test_m2m_to_fk(self):
|
||
self._test_explicit_related_name_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ManyToManyField("Target", related_name="clash"),
|
||
)
|
||
|
||
def test_m2m_to_m2m(self):
|
||
self._test_explicit_related_name_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ManyToManyField("Target", related_name="clash"),
|
||
)
|
||
|
||
def _test_explicit_related_name_clash(self, target, relative):
|
||
class Another(models.Model):
|
||
pass
|
||
|
||
class Target(models.Model):
|
||
clash = target
|
||
|
||
class Model(models.Model):
|
||
rel = relative
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Target.clash' for "
|
||
"'invalid_models_tests.Model.rel' clashes with field name "
|
||
"'invalid_models_tests.Target.clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.rel'."
|
||
),
|
||
obj=Model._meta.get_field("rel"),
|
||
id="fields.E302",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.rel' "
|
||
"clashes with field name 'invalid_models_tests.Target.clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.rel'."
|
||
),
|
||
obj=Model._meta.get_field("rel"),
|
||
id="fields.E303",
|
||
),
|
||
],
|
||
)
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class ExplicitRelatedQueryNameClashTests(SimpleTestCase):
|
||
def test_fk_to_integer(self, related_name=None):
|
||
self._test_explicit_related_query_name_clash(
|
||
target=models.IntegerField(),
|
||
relative=models.ForeignKey(
|
||
"Target",
|
||
models.CASCADE,
|
||
related_name=related_name,
|
||
related_query_name="clash",
|
||
),
|
||
)
|
||
|
||
def test_hidden_fk_to_integer(self, related_name=None):
|
||
self.test_fk_to_integer(related_name="+")
|
||
|
||
def test_fk_to_fk(self, related_name=None):
|
||
self._test_explicit_related_query_name_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ForeignKey(
|
||
"Target",
|
||
models.CASCADE,
|
||
related_name=related_name,
|
||
related_query_name="clash",
|
||
),
|
||
)
|
||
|
||
def test_hidden_fk_to_fk(self):
|
||
self.test_fk_to_fk(related_name="+")
|
||
|
||
def test_fk_to_m2m(self, related_name=None):
|
||
self._test_explicit_related_query_name_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ForeignKey(
|
||
"Target",
|
||
models.CASCADE,
|
||
related_name=related_name,
|
||
related_query_name="clash",
|
||
),
|
||
)
|
||
|
||
def test_hidden_fk_to_m2m(self):
|
||
self.test_fk_to_m2m(related_name="+")
|
||
|
||
def test_m2m_to_integer(self, related_name=None):
|
||
self._test_explicit_related_query_name_clash(
|
||
target=models.IntegerField(),
|
||
relative=models.ManyToManyField(
|
||
"Target", related_name=related_name, related_query_name="clash"
|
||
),
|
||
)
|
||
|
||
def test_hidden_m2m_to_integer(self):
|
||
self.test_m2m_to_integer(related_name="+")
|
||
|
||
def test_m2m_to_fk(self, related_name=None):
|
||
self._test_explicit_related_query_name_clash(
|
||
target=models.ForeignKey("Another", models.CASCADE),
|
||
relative=models.ManyToManyField(
|
||
"Target", related_name=related_name, related_query_name="clash"
|
||
),
|
||
)
|
||
|
||
def test_hidden_m2m_to_fk(self):
|
||
self.test_m2m_to_fk(related_name="+")
|
||
|
||
def test_m2m_to_m2m(self, related_name=None):
|
||
self._test_explicit_related_query_name_clash(
|
||
target=models.ManyToManyField("Another"),
|
||
relative=models.ManyToManyField(
|
||
"Target",
|
||
related_name=related_name,
|
||
related_query_name="clash",
|
||
),
|
||
)
|
||
|
||
def test_hidden_m2m_to_m2m(self):
|
||
self.test_m2m_to_m2m(related_name="+")
|
||
|
||
def _test_explicit_related_query_name_clash(self, target, relative):
|
||
class Another(models.Model):
|
||
pass
|
||
|
||
class Target(models.Model):
|
||
clash = target
|
||
|
||
class Model(models.Model):
|
||
rel = relative
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.rel' "
|
||
"clashes with field name 'invalid_models_tests.Target.clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.rel'."
|
||
),
|
||
obj=Model._meta.get_field("rel"),
|
||
id="fields.E303",
|
||
),
|
||
],
|
||
)
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class SelfReferentialM2MClashTests(SimpleTestCase):
|
||
def test_clash_between_accessors(self):
|
||
class Model(models.Model):
|
||
first_m2m = models.ManyToManyField("self", symmetrical=False)
|
||
second_m2m = models.ManyToManyField("self", symmetrical=False)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Model.model_set' for "
|
||
"'invalid_models_tests.Model.first_m2m' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.second_m2m'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.first_m2m' or "
|
||
"'invalid_models_tests.Model.second_m2m'."
|
||
),
|
||
obj=Model._meta.get_field("first_m2m"),
|
||
id="fields.E304",
|
||
),
|
||
Error(
|
||
"Reverse accessor 'Model.model_set' for "
|
||
"'invalid_models_tests.Model.second_m2m' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.first_m2m'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.second_m2m' or "
|
||
"'invalid_models_tests.Model.first_m2m'."
|
||
),
|
||
obj=Model._meta.get_field("second_m2m"),
|
||
id="fields.E304",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_accessor_clash(self):
|
||
class Model(models.Model):
|
||
model_set = models.ManyToManyField("self", symmetrical=False)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Model.model_set' for "
|
||
"'invalid_models_tests.Model.model_set' clashes with field "
|
||
"name 'invalid_models_tests.Model.model_set'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.model_set', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.model_set'."
|
||
),
|
||
obj=Model._meta.get_field("model_set"),
|
||
id="fields.E302",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_reverse_query_name_clash(self):
|
||
class Model(models.Model):
|
||
model = models.ManyToManyField("self", symmetrical=False)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.model' "
|
||
"clashes with field name 'invalid_models_tests.Model.model'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.model', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.model'."
|
||
),
|
||
obj=Model._meta.get_field("model"),
|
||
id="fields.E303",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_clash_under_explicit_related_name(self):
|
||
class Model(models.Model):
|
||
clash = models.IntegerField()
|
||
m2m = models.ManyToManyField(
|
||
"self", symmetrical=False, related_name="clash"
|
||
)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Model.clash' for "
|
||
"'invalid_models_tests.Model.m2m' clashes with field name "
|
||
"'invalid_models_tests.Model.clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.m2m'."
|
||
),
|
||
obj=Model._meta.get_field("m2m"),
|
||
id="fields.E302",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.m2m' "
|
||
"clashes with field name 'invalid_models_tests.Model.clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.m2m'."
|
||
),
|
||
obj=Model._meta.get_field("m2m"),
|
||
id="fields.E303",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_valid_model(self):
|
||
class Model(models.Model):
|
||
first = models.ManyToManyField(
|
||
"self", symmetrical=False, related_name="first_accessor"
|
||
)
|
||
second = models.ManyToManyField(
|
||
"self", symmetrical=False, related_name="second_accessor"
|
||
)
|
||
|
||
self.assertEqual(Model.check(), [])
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class SelfReferentialFKClashTests(SimpleTestCase):
|
||
def test_accessor_clash(self):
|
||
class Model(models.Model):
|
||
model_set = models.ForeignKey("Model", models.CASCADE)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Model.model_set' for "
|
||
"'invalid_models_tests.Model.model_set' clashes with field "
|
||
"name 'invalid_models_tests.Model.model_set'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.model_set', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.model_set'."
|
||
),
|
||
obj=Model._meta.get_field("model_set"),
|
||
id="fields.E302",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_reverse_query_name_clash(self):
|
||
class Model(models.Model):
|
||
model = models.ForeignKey("Model", models.CASCADE)
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.model' "
|
||
"clashes with field name 'invalid_models_tests.Model.model'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.model', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.model'."
|
||
),
|
||
obj=Model._meta.get_field("model"),
|
||
id="fields.E303",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_clash_under_explicit_related_name(self):
|
||
class Model(models.Model):
|
||
clash = models.CharField(max_length=10)
|
||
foreign = models.ForeignKey("Model", models.CASCADE, related_name="clash")
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Model.clash' for "
|
||
"'invalid_models_tests.Model.foreign' clashes with field name "
|
||
"'invalid_models_tests.Model.clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.foreign'."
|
||
),
|
||
obj=Model._meta.get_field("foreign"),
|
||
id="fields.E302",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.foreign' "
|
||
"clashes with field name 'invalid_models_tests.Model.clash'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Model.clash', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.foreign'."
|
||
),
|
||
obj=Model._meta.get_field("foreign"),
|
||
id="fields.E303",
|
||
),
|
||
],
|
||
)
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class ComplexClashTests(SimpleTestCase):
|
||
# New tests should not be included here, because this is a single,
|
||
# self-contained sanity check, not a test of everything.
|
||
def test_complex_clash(self):
|
||
class Target(models.Model):
|
||
tgt_safe = models.CharField(max_length=10)
|
||
clash = models.CharField(max_length=10)
|
||
model = models.CharField(max_length=10)
|
||
|
||
clash1_set = models.CharField(max_length=10)
|
||
|
||
class Model(models.Model):
|
||
src_safe = models.CharField(max_length=10)
|
||
|
||
foreign_1 = models.ForeignKey(Target, models.CASCADE, related_name="id")
|
||
foreign_2 = models.ForeignKey(
|
||
Target, models.CASCADE, related_name="src_safe"
|
||
)
|
||
|
||
m2m_1 = models.ManyToManyField(Target, related_name="id")
|
||
m2m_2 = models.ManyToManyField(Target, related_name="src_safe")
|
||
|
||
self.assertEqual(
|
||
Model.check(),
|
||
[
|
||
Error(
|
||
"Reverse accessor 'Target.id' for "
|
||
"'invalid_models_tests.Model.foreign_1' clashes with field "
|
||
"name 'invalid_models_tests.Target.id'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.id', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.foreign_1'."
|
||
),
|
||
obj=Model._meta.get_field("foreign_1"),
|
||
id="fields.E302",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.foreign_1' "
|
||
"clashes with field name 'invalid_models_tests.Target.id'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.id', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.foreign_1'."
|
||
),
|
||
obj=Model._meta.get_field("foreign_1"),
|
||
id="fields.E303",
|
||
),
|
||
Error(
|
||
"Reverse accessor 'Target.id' for "
|
||
"'invalid_models_tests.Model.foreign_1' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.m2m_1'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.foreign_1' or "
|
||
"'invalid_models_tests.Model.m2m_1'."
|
||
),
|
||
obj=Model._meta.get_field("foreign_1"),
|
||
id="fields.E304",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.foreign_1' "
|
||
"clashes with reverse query name for "
|
||
"'invalid_models_tests.Model.m2m_1'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.foreign_1' or "
|
||
"'invalid_models_tests.Model.m2m_1'."
|
||
),
|
||
obj=Model._meta.get_field("foreign_1"),
|
||
id="fields.E305",
|
||
),
|
||
Error(
|
||
"Reverse accessor 'Target.src_safe' for "
|
||
"'invalid_models_tests.Model.foreign_2' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.m2m_2'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.foreign_2' or "
|
||
"'invalid_models_tests.Model.m2m_2'."
|
||
),
|
||
obj=Model._meta.get_field("foreign_2"),
|
||
id="fields.E304",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.foreign_2' "
|
||
"clashes with reverse query name for "
|
||
"'invalid_models_tests.Model.m2m_2'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.foreign_2' or "
|
||
"'invalid_models_tests.Model.m2m_2'."
|
||
),
|
||
obj=Model._meta.get_field("foreign_2"),
|
||
id="fields.E305",
|
||
),
|
||
Error(
|
||
"Reverse accessor 'Target.id' for "
|
||
"'invalid_models_tests.Model.m2m_1' clashes with field name "
|
||
"'invalid_models_tests.Target.id'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.id', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.m2m_1'."
|
||
),
|
||
obj=Model._meta.get_field("m2m_1"),
|
||
id="fields.E302",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.m2m_1' "
|
||
"clashes with field name 'invalid_models_tests.Target.id'.",
|
||
hint=(
|
||
"Rename field 'invalid_models_tests.Target.id', or "
|
||
"add/change a related_name argument to the definition for "
|
||
"field 'invalid_models_tests.Model.m2m_1'."
|
||
),
|
||
obj=Model._meta.get_field("m2m_1"),
|
||
id="fields.E303",
|
||
),
|
||
Error(
|
||
"Reverse accessor 'Target.id' for "
|
||
"'invalid_models_tests.Model.m2m_1' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.foreign_1'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.m2m_1' or "
|
||
"'invalid_models_tests.Model.foreign_1'."
|
||
),
|
||
obj=Model._meta.get_field("m2m_1"),
|
||
id="fields.E304",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.m2m_1' "
|
||
"clashes with reverse query name for "
|
||
"'invalid_models_tests.Model.foreign_1'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.m2m_1' or "
|
||
"'invalid_models_tests.Model.foreign_1'."
|
||
),
|
||
obj=Model._meta.get_field("m2m_1"),
|
||
id="fields.E305",
|
||
),
|
||
Error(
|
||
"Reverse accessor 'Target.src_safe' for "
|
||
"'invalid_models_tests.Model.m2m_2' clashes with reverse "
|
||
"accessor for 'invalid_models_tests.Model.foreign_2'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.m2m_2' or "
|
||
"'invalid_models_tests.Model.foreign_2'."
|
||
),
|
||
obj=Model._meta.get_field("m2m_2"),
|
||
id="fields.E304",
|
||
),
|
||
Error(
|
||
"Reverse query name for 'invalid_models_tests.Model.m2m_2' "
|
||
"clashes with reverse query name for "
|
||
"'invalid_models_tests.Model.foreign_2'.",
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Model.m2m_2' or "
|
||
"'invalid_models_tests.Model.foreign_2'."
|
||
),
|
||
obj=Model._meta.get_field("m2m_2"),
|
||
id="fields.E305",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_clash_parent_link(self):
|
||
class Parent(models.Model):
|
||
pass
|
||
|
||
class Child(Parent):
|
||
other_parent = models.OneToOneField(Parent, models.CASCADE)
|
||
|
||
errors = [
|
||
(
|
||
"fields.E304",
|
||
"accessor",
|
||
" 'Parent.child'",
|
||
"parent_ptr",
|
||
"other_parent",
|
||
),
|
||
("fields.E305", "query name", "", "parent_ptr", "other_parent"),
|
||
(
|
||
"fields.E304",
|
||
"accessor",
|
||
" 'Parent.child'",
|
||
"other_parent",
|
||
"parent_ptr",
|
||
),
|
||
("fields.E305", "query name", "", "other_parent", "parent_ptr"),
|
||
]
|
||
self.assertEqual(
|
||
Child.check(),
|
||
[
|
||
Error(
|
||
"Reverse %s%s for 'invalid_models_tests.Child.%s' clashes with "
|
||
"reverse %s for 'invalid_models_tests.Child.%s'."
|
||
% (attr, rel_name, field_name, attr, clash_name),
|
||
hint=(
|
||
"Add or change a related_name argument to the definition "
|
||
"for 'invalid_models_tests.Child.%s' or "
|
||
"'invalid_models_tests.Child.%s'." % (field_name, clash_name)
|
||
),
|
||
obj=Child._meta.get_field(field_name),
|
||
id=error_id,
|
||
)
|
||
for error_id, attr, rel_name, field_name, clash_name in errors
|
||
],
|
||
)
|
||
|
||
|
||
@isolate_apps("invalid_models_tests")
|
||
class M2mThroughFieldsTests(SimpleTestCase):
|
||
def test_m2m_field_argument_validation(self):
|
||
"""
|
||
ManyToManyField accepts the ``through_fields`` kwarg
|
||
only if an intermediary table is specified.
|
||
"""
|
||
|
||
class Fan(models.Model):
|
||
pass
|
||
|
||
with self.assertRaisesMessage(
|
||
ValueError, "Cannot specify through_fields without a through model"
|
||
):
|
||
models.ManyToManyField(Fan, through_fields=("f1", "f2"))
|
||
|
||
def test_invalid_order(self):
|
||
"""
|
||
Mixing up the order of link fields to ManyToManyField.through_fields
|
||
triggers validation errors.
|
||
"""
|
||
|
||
class Fan(models.Model):
|
||
pass
|
||
|
||
class Event(models.Model):
|
||
invitees = models.ManyToManyField(
|
||
Fan, through="Invitation", through_fields=("invitee", "event")
|
||
)
|
||
|
||
class Invitation(models.Model):
|
||
event = models.ForeignKey(Event, models.CASCADE)
|
||
invitee = models.ForeignKey(Fan, models.CASCADE)
|
||
inviter = models.ForeignKey(Fan, models.CASCADE, related_name="+")
|
||
|
||
field = Event._meta.get_field("invitees")
|
||
self.assertEqual(
|
||
field.check(from_model=Event),
|
||
[
|
||
Error(
|
||
"'Invitation.invitee' is not a foreign key to 'Event'.",
|
||
hint=(
|
||
"Did you mean one of the following foreign keys to 'Event': "
|
||
"event?"
|
||
),
|
||
obj=field,
|
||
id="fields.E339",
|
||
),
|
||
Error(
|
||
"'Invitation.event' is not a foreign key to 'Fan'.",
|
||
hint=(
|
||
"Did you mean one of the following foreign keys to 'Fan': "
|
||
"invitee, inviter?"
|
||
),
|
||
obj=field,
|
||
id="fields.E339",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_invalid_field(self):
|
||
"""
|
||
Providing invalid field names to ManyToManyField.through_fields
|
||
triggers validation errors.
|
||
"""
|
||
|
||
class Fan(models.Model):
|
||
pass
|
||
|
||
class Event(models.Model):
|
||
invitees = models.ManyToManyField(
|
||
Fan,
|
||
through="Invitation",
|
||
through_fields=("invalid_field_1", "invalid_field_2"),
|
||
)
|
||
|
||
class Invitation(models.Model):
|
||
event = models.ForeignKey(Event, models.CASCADE)
|
||
invitee = models.ForeignKey(Fan, models.CASCADE)
|
||
inviter = models.ForeignKey(Fan, models.CASCADE, related_name="+")
|
||
|
||
field = Event._meta.get_field("invitees")
|
||
self.assertEqual(
|
||
field.check(from_model=Event),
|
||
[
|
||
Error(
|
||
"The intermediary model 'invalid_models_tests.Invitation' has no "
|
||
"field 'invalid_field_1'.",
|
||
hint=(
|
||
"Did you mean one of the following foreign keys to 'Event': "
|
||
"event?"
|
||
),
|
||
obj=field,
|
||
id="fields.E338",
|
||
),
|
||
Error(
|
||
"The intermediary model 'invalid_models_tests.Invitation' has no "
|
||
"field 'invalid_field_2'.",
|
||
hint=(
|
||
"Did you mean one of the following foreign keys to 'Fan': "
|
||
"invitee, inviter?"
|
||
),
|
||
obj=field,
|
||
id="fields.E338",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_explicit_field_names(self):
|
||
"""
|
||
If ``through_fields`` kwarg is given, it must specify both
|
||
link fields of the intermediary table.
|
||
"""
|
||
|
||
class Fan(models.Model):
|
||
pass
|
||
|
||
class Event(models.Model):
|
||
invitees = models.ManyToManyField(
|
||
Fan, through="Invitation", through_fields=(None, "invitee")
|
||
)
|
||
|
||
class Invitation(models.Model):
|
||
event = models.ForeignKey(Event, models.CASCADE)
|
||
invitee = models.ForeignKey(Fan, models.CASCADE)
|
||
inviter = models.ForeignKey(Fan, models.CASCADE, related_name="+")
|
||
|
||
field = Event._meta.get_field("invitees")
|
||
self.assertEqual(
|
||
field.check(from_model=Event),
|
||
[
|
||
Error(
|
||
"Field specifies 'through_fields' but does not provide the names "
|
||
"of the two link fields that should be used for the relation "
|
||
"through model 'invalid_models_tests.Invitation'.",
|
||
hint=(
|
||
"Make sure you specify 'through_fields' as "
|
||
"through_fields=('field1', 'field2')"
|
||
),
|
||
obj=field,
|
||
id="fields.E337",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_superset_foreign_object(self):
|
||
class Parent(models.Model):
|
||
a = models.PositiveIntegerField()
|
||
b = models.PositiveIntegerField()
|
||
c = models.PositiveIntegerField()
|
||
|
||
class Meta:
|
||
unique_together = (("a", "b", "c"),)
|
||
|
||
class Child(models.Model):
|
||
a = models.PositiveIntegerField()
|
||
b = models.PositiveIntegerField()
|
||
value = models.CharField(max_length=255)
|
||
parent = models.ForeignObject(
|
||
Parent,
|
||
on_delete=models.SET_NULL,
|
||
from_fields=("a", "b"),
|
||
to_fields=("a", "b"),
|
||
related_name="children",
|
||
)
|
||
|
||
field = Child._meta.get_field("parent")
|
||
self.assertEqual(
|
||
field.check(from_model=Child),
|
||
[
|
||
Error(
|
||
"No subset of the fields 'a', 'b' on model 'Parent' is unique.",
|
||
hint=(
|
||
"Mark a single field as unique=True or add a set of "
|
||
"fields to a unique constraint (via unique_together or a "
|
||
"UniqueConstraint (without condition) in the model "
|
||
"Meta.constraints)."
|
||
),
|
||
obj=field,
|
||
id="fields.E310",
|
||
),
|
||
],
|
||
)
|
||
|
||
def test_intersection_foreign_object(self):
|
||
class Parent(models.Model):
|
||
a = models.PositiveIntegerField()
|
||
b = models.PositiveIntegerField()
|
||
c = models.PositiveIntegerField()
|
||
d = models.PositiveIntegerField()
|
||
|
||
class Meta:
|
||
unique_together = (("a", "b", "c"),)
|
||
|
||
class Child(models.Model):
|
||
a = models.PositiveIntegerField()
|
||
b = models.PositiveIntegerField()
|
||
d = models.PositiveIntegerField()
|
||
value = models.CharField(max_length=255)
|
||
parent = models.ForeignObject(
|
||
Parent,
|
||
on_delete=models.SET_NULL,
|
||
from_fields=("a", "b", "d"),
|
||
to_fields=("a", "b", "d"),
|
||
related_name="children",
|
||
)
|
||
|
||
field = Child._meta.get_field("parent")
|
||
self.assertEqual(
|
||
field.check(from_model=Child),
|
||
[
|
||
Error(
|
||
"No subset of the fields 'a', 'b', 'd' on model 'Parent' is "
|
||
"unique.",
|
||
hint=(
|
||
"Mark a single field as unique=True or add a set of "
|
||
"fields to a unique constraint (via unique_together or a "
|
||
"UniqueConstraint (without condition) in the model "
|
||
"Meta.constraints)."
|
||
),
|
||
obj=field,
|
||
id="fields.E310",
|
||
),
|
||
],
|
||
)
|