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django/tests/invalid_models_tests/test_relative_fields.py
Christopher Medrela d0133504e5 Fixed #22047 -- detecting related_name clash with inheritance
Thanks to mondone for fruitful colaboration.
2014-02-15 17:24:05 +01:00

1067 lines
39 KiB
Python

# -*- encoding: utf-8 -*-
from __future__ import unicode_literals
from django.core.checks import Error
from django.db import models
from django.test.utils import override_settings
from django.test.testcases import skipIfDBFeature
from .base import IsolatedModelsTestCase
class RelativeFieldTests(IsolatedModelsTestCase):
def test_valid_foreign_key_without_accessor(self):
class Target(models.Model):
# There would be a clash if Model.field installed an accessor.
model = models.IntegerField()
class Model(models.Model):
field = models.ForeignKey(Target, related_name='+')
field = Model._meta.get_field('field')
errors = field.check()
self.assertEqual(errors, [])
def test_foreign_key_to_missing_model(self):
# Model names are resolved when a model is being created, so we cannot
# test relative fields in isolation and we need to attach them to a
# model.
class Model(models.Model):
foreign_key = models.ForeignKey('Rel1')
field = Model._meta.get_field('foreign_key')
errors = field.check()
expected = [
Error(
('The field has a relation with model Rel1, '
'which has either not been installed or is abstract.'),
hint=('Ensure that you did not misspell the model name and '
'the model is not abstract. Does your INSTALLED_APPS '
'setting contain the app where Rel1 is defined?'),
obj=field,
id='E030',
),
]
self.assertEqual(errors, expected)
def test_many_to_many_to_missing_model(self):
class Model(models.Model):
m2m = models.ManyToManyField("Rel2")
field = Model._meta.get_field('m2m')
errors = field.check(from_model=Model)
expected = [
Error(
('The field has a relation with model Rel2, '
'which has either not been installed or is abstract.'),
hint=('Ensure that you did not misspell the model name and '
'the model is not abstract. Does your INSTALLED_APPS '
'setting contain the app where Rel2 is defined?'),
obj=field,
id='E030',
),
]
self.assertEqual(errors, expected)
def test_ambiguous_relationship_model(self):
class Person(models.Model):
pass
class Group(models.Model):
field = models.ManyToManyField('Person',
through="AmbiguousRelationship", related_name='tertiary')
class AmbiguousRelationship(models.Model):
# Too much foreign keys to Person.
first_person = models.ForeignKey(Person, related_name="first")
second_person = models.ForeignKey(Person, related_name="second")
second_model = models.ForeignKey(Group)
field = Group._meta.get_field('field')
errors = field.check(from_model=Group)
expected = [
Error(
('The model is used as an intermediary model by '
'invalid_models_tests.Group.field, but it has more than one '
'foreign key to Person, '
'which is ambiguous and is not permitted.'),
hint=('If you want to create a recursive relationship, use '
'ForeignKey("self", symmetrical=False, '
'through="AmbiguousRelationship").'),
obj=field,
id='E027',
),
]
self.assertEqual(errors, expected)
def test_relationship_model_with_foreign_key_to_wrong_model(self):
class WrongModel(models.Model):
pass
class Person(models.Model):
pass
class Group(models.Model):
members = models.ManyToManyField('Person',
through="InvalidRelationship")
class InvalidRelationship(models.Model):
person = models.ForeignKey(Person)
wrong_foreign_key = models.ForeignKey(WrongModel)
# The last foreign key should point to Group model.
field = Group._meta.get_field('members')
errors = field.check(from_model=Group)
expected = [
Error(
('The model is used as an intermediary model by '
'invalid_models_tests.Group.members, but it misses '
'a foreign key to Group or Person.'),
hint=None,
obj=InvalidRelationship,
id='E028',
),
]
self.assertEqual(errors, expected)
def test_relationship_model_missing_foreign_key(self):
class Person(models.Model):
pass
class Group(models.Model):
members = models.ManyToManyField('Person',
through="InvalidRelationship")
class InvalidRelationship(models.Model):
group = models.ForeignKey(Group)
# No foreign key to Person
field = Group._meta.get_field('members')
errors = field.check(from_model=Group)
expected = [
Error(
('The model is used as an intermediary model by '
'invalid_models_tests.Group.members, but it misses '
'a foreign key to Group or Person.'),
hint=None,
obj=InvalidRelationship,
id='E028',
),
]
self.assertEqual(errors, expected)
def test_missing_relationship_model(self):
class Person(models.Model):
pass
class Group(models.Model):
members = models.ManyToManyField('Person',
through="MissingM2MModel")
field = Group._meta.get_field('members')
errors = field.check(from_model=Group)
expected = [
Error(
('The field specifies a many-to-many relation through model '
'MissingM2MModel, which has not been installed.'),
hint=('Ensure that you did not misspell the model name and '
'the model is not abstract. Does your INSTALLED_APPS '
'setting contain the app where MissingM2MModel is defined?'),
obj=field,
id='E023',
),
]
self.assertEqual(errors, expected)
def test_symmetrical_self_referential_field(self):
class Person(models.Model):
# Implicit symmetrical=False.
friends = models.ManyToManyField('self', through="Relationship")
class Relationship(models.Model):
first = models.ForeignKey(Person, related_name="rel_from_set")
second = models.ForeignKey(Person, related_name="rel_to_set")
field = Person._meta.get_field('friends')
errors = field.check(from_model=Person)
expected = [
Error(
'Many-to-many fields with intermediate tables must not be symmetrical.',
hint=None,
obj=field,
id='E024',
),
]
self.assertEqual(errors, expected)
def test_too_many_foreign_keys_in_self_referential_model(self):
class Person(models.Model):
friends = models.ManyToManyField('self',
through="InvalidRelationship", symmetrical=False)
class InvalidRelationship(models.Model):
first = models.ForeignKey(Person, related_name="rel_from_set_2")
second = models.ForeignKey(Person, related_name="rel_to_set_2")
third = models.ForeignKey(Person, related_name="too_many_by_far")
field = Person._meta.get_field('friends')
errors = field.check(from_model=Person)
expected = [
Error(
('The model is used as an intermediary model by '
'invalid_models_tests.Person.friends, but it has more than two '
'foreign keys to Person, which is ambiguous and '
'is not permitted.'),
hint=None,
obj=InvalidRelationship,
id='E025',
),
]
self.assertEqual(errors, expected)
def test_symmetric_self_reference_with_intermediate_table(self):
class Person(models.Model):
# Explicit symmetrical=True.
friends = models.ManyToManyField('self',
through="Relationship", symmetrical=True)
class Relationship(models.Model):
first = models.ForeignKey(Person, related_name="rel_from_set")
second = models.ForeignKey(Person, related_name="rel_to_set")
field = Person._meta.get_field('friends')
errors = field.check(from_model=Person)
expected = [
Error(
'Many-to-many fields with intermediate tables must not be symmetrical.',
hint=None,
obj=field,
id='E024',
),
]
self.assertEqual(errors, expected)
def test_foreign_key_to_abstract_model(self):
class Model(models.Model):
foreign_key = models.ForeignKey('AbstractModel')
class AbstractModel(models.Model):
class Meta:
abstract = True
field = Model._meta.get_field('foreign_key')
errors = field.check()
expected = [
Error(
('The field has a relation with model AbstractModel, '
'which has either not been installed or is abstract.'),
hint=('Ensure that you did not misspell the model name and '
'the model is not abstract. Does your INSTALLED_APPS '
'setting contain the app where AbstractModel is defined?'),
obj=field,
id='E030',
),
]
self.assertEqual(errors, expected)
def test_m2m_to_abstract_model(self):
class AbstractModel(models.Model):
class Meta:
abstract = True
class Model(models.Model):
m2m = models.ManyToManyField('AbstractModel')
field = Model._meta.get_field('m2m')
errors = field.check(from_model=Model)
expected = [
Error(
('The field has a relation with model AbstractModel, '
'which has either not been installed or is abstract.'),
hint=('Ensure that you did not misspell the model name and '
'the model is not abstract. Does your INSTALLED_APPS '
'setting contain the app where AbstractModel is defined?'),
obj=field,
id='E030',
),
]
self.assertEqual(errors, expected)
def test_unique_m2m(self):
class Person(models.Model):
name = models.CharField(max_length=5)
class Group(models.Model):
members = models.ManyToManyField('Person', unique=True)
field = Group._meta.get_field('members')
errors = field.check(from_model=Group)
expected = [
Error(
'ManyToManyFields must not be unique.',
hint=None,
obj=field,
id='E022',
),
]
self.assertEqual(errors, expected)
def test_foreign_key_to_non_unique_field(self):
class Target(models.Model):
bad = models.IntegerField() # No unique=True
class Model(models.Model):
foreign_key = models.ForeignKey('Target', to_field='bad')
field = Model._meta.get_field('foreign_key')
errors = field.check()
expected = [
Error(
'Target.bad must have unique=True because it is referenced by a foreign key.',
hint=None,
obj=field,
id='E019',
),
]
self.assertEqual(errors, expected)
def test_foreign_key_to_non_unique_field_under_explicit_model(self):
class Target(models.Model):
bad = models.IntegerField()
class Model(models.Model):
field = models.ForeignKey(Target, to_field='bad')
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
'Target.bad must have unique=True because it is referenced by a foreign key.',
hint=None,
obj=field,
id='E019',
),
]
self.assertEqual(errors, expected)
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,
from_fields=['person_country_id', 'person_city_id'],
to_fields=['country_id', 'city_id'])
field = MMembership._meta.get_field('person')
errors = field.check()
expected = [
Error(
('No unique=True constraint on field combination '
'"country_id,city_id" under model Person.'),
hint=('Set unique=True argument on any of the fields '
'"country_id,city_id" under model Person.'),
obj=field,
id='E018',
)
]
self.assertEqual(errors, expected)
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',
on_delete=models.SET_NULL)
field = Model._meta.get_field('foreign_key')
errors = field.check()
expected = [
Error(
'The field specifies on_delete=SET_NULL, but cannot be null.',
hint='Set null=True argument on the field.',
obj=field,
id='E020',
),
]
self.assertEqual(errors, expected)
def test_on_delete_set_default_without_default_value(self):
class Person(models.Model):
pass
class Model(models.Model):
foreign_key = models.ForeignKey('Person',
on_delete=models.SET_DEFAULT)
field = Model._meta.get_field('foreign_key')
errors = field.check()
expected = [
Error(
'The field specifies on_delete=SET_DEFAULT, but has no default value.',
hint=None,
obj=field,
id='E021',
),
]
self.assertEqual(errors, expected)
@skipIfDBFeature('interprets_empty_strings_as_nulls')
def test_nullable_primary_key(self):
class Model(models.Model):
field = models.IntegerField(primary_key=True, null=True)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
'Primary keys must not have null=True.',
hint='Set null=False on the field or remove primary_key=True argument.',
obj=field,
id='E036',
),
]
self.assertEqual(errors, expected)
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,
related_name='explicit_fk')
implicit_fk = models.ForeignKey('invalid_models_tests.SwappableModel',
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,
related_name='explicit_fk')
implicit_fk = models.ForeignKey('invalid_models_tests.SwappedModel',
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(
('The 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='E029',
)
for field in fields:
expected_error.obj = field
errors = field.check(from_model=Model)
self.assertEqual(errors, [expected_error])
class AccessorClashTests(IsolatedModelsTestCase):
def test_fk_to_integer(self):
self._test_accessor_clash(
target=models.IntegerField(),
relative=models.ForeignKey('Target'))
def test_fk_to_fk(self):
self._test_accessor_clash(
target=models.ForeignKey('Another'),
relative=models.ForeignKey('Target'))
def test_fk_to_m2m(self):
self._test_accessor_clash(
target=models.ManyToManyField('Another'),
relative=models.ForeignKey('Target'))
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'),
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
errors = Model.check()
expected = [
Error(
'Accessor for field Model.rel clashes with field Target.model_set.',
hint=('Rename field Target.model_set or add/change '
'a related_name argument to the definition '
'for field Model.rel.'),
obj=Model._meta.get_field('rel'),
id='E014',
),
]
self.assertEqual(errors, expected)
def test_clash_between_accessors(self):
class Target(models.Model):
pass
class Model(models.Model):
foreign = models.ForeignKey(Target)
m2m = models.ManyToManyField(Target)
errors = Model.check()
expected = [
Error(
'Clash between accessors for Model.foreign and Model.m2m.',
hint=('Add or change a related_name argument to the definition '
'for Model.foreign or Model.m2m.'),
obj=Model._meta.get_field('foreign'),
id='E016',
),
Error(
'Clash between accessors for Model.m2m and Model.foreign.',
hint=('Add or change a related_name argument to the definition '
'for Model.m2m or Model.foreign.'),
obj=Model._meta.get_field('m2m'),
id='E016',
),
]
self.assertEqual(errors, expected)
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
errors = Model.check()
expected = [
Error(
'Accessor for field Model.children clashes with field Child.m2m_clash.',
hint=('Rename field Child.m2m_clash or add/change '
'a related_name argument to the definition '
'for field Model.children.'),
obj=Model._meta.get_field('children'),
id='E014',
)
]
self.assertEqual(errors, expected)
class ReverseQueryNameClashTests(IsolatedModelsTestCase):
def test_fk_to_integer(self):
self._test_reverse_query_name_clash(
target=models.IntegerField(),
relative=models.ForeignKey('Target'))
def test_fk_to_fk(self):
self._test_reverse_query_name_clash(
target=models.ForeignKey('Another'),
relative=models.ForeignKey('Target'))
def test_fk_to_m2m(self):
self._test_reverse_query_name_clash(
target=models.ManyToManyField('Another'),
relative=models.ForeignKey('Target'))
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'),
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
errors = Model.check()
expected = [
Error(
'Reverse query name for field Model.rel clashes with field Target.model.',
hint=('Rename field Target.model or add/change '
'a related_name argument to the definition '
'for field Model.rel.'),
obj=Model._meta.get_field('rel'),
id='E015',
),
]
self.assertEqual(errors, expected)
class ExplicitRelatedNameClashTests(IsolatedModelsTestCase):
def test_fk_to_integer(self):
self._test_explicit_related_name_clash(
target=models.IntegerField(),
relative=models.ForeignKey('Target', related_name='clash'))
def test_fk_to_fk(self):
self._test_explicit_related_name_clash(
target=models.ForeignKey('Another'),
relative=models.ForeignKey('Target', related_name='clash'))
def test_fk_to_m2m(self):
self._test_explicit_related_name_clash(
target=models.ManyToManyField('Another'),
relative=models.ForeignKey('Target', 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'),
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
errors = Model.check()
expected = [
Error(
'Accessor for field Model.rel clashes with field Target.clash.',
hint=('Rename field Target.clash or add/change '
'a related_name argument to the definition '
'for field Model.rel.'),
obj=Model._meta.get_field('rel'),
id='E014',
),
Error(
'Reverse query name for field Model.rel clashes with field Target.clash.',
hint=('Rename field Target.clash or add/change '
'a related_name argument to the definition '
'for field Model.rel.'),
obj=Model._meta.get_field('rel'),
id='E015',
),
]
self.assertEqual(errors, expected)
class ExplicitRelatedQueryNameClashTests(IsolatedModelsTestCase):
def test_fk_to_integer(self):
self._test_explicit_related_query_name_clash(
target=models.IntegerField(),
relative=models.ForeignKey('Target',
related_query_name='clash'))
def test_fk_to_fk(self):
self._test_explicit_related_query_name_clash(
target=models.ForeignKey('Another'),
relative=models.ForeignKey('Target',
related_query_name='clash'))
def test_fk_to_m2m(self):
self._test_explicit_related_query_name_clash(
target=models.ManyToManyField('Another'),
relative=models.ForeignKey('Target',
related_query_name='clash'))
def test_m2m_to_integer(self):
self._test_explicit_related_query_name_clash(
target=models.IntegerField(),
relative=models.ManyToManyField('Target',
related_query_name='clash'))
def test_m2m_to_fk(self):
self._test_explicit_related_query_name_clash(
target=models.ForeignKey('Another'),
relative=models.ManyToManyField('Target',
related_query_name='clash'))
def test_m2m_to_m2m(self):
self._test_explicit_related_query_name_clash(
target=models.ManyToManyField('Another'),
relative=models.ManyToManyField('Target',
related_query_name='clash'))
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
errors = Model.check()
expected = [
Error(
'Reverse query name for field Model.rel clashes with field Target.clash.',
hint=('Rename field Target.clash or add/change a related_name '
'argument to the definition for field Model.rel.'),
obj=Model._meta.get_field('rel'),
id='E015',
),
]
self.assertEqual(errors, expected)
class SelfReferentialM2MClashTests(IsolatedModelsTestCase):
def test_clash_between_accessors(self):
class Model(models.Model):
first_m2m = models.ManyToManyField('self', symmetrical=False)
second_m2m = models.ManyToManyField('self', symmetrical=False)
errors = Model.check()
expected = [
Error(
'Clash between accessors for Model.first_m2m and Model.second_m2m.',
hint=('Add or change a related_name argument to the definition '
'for Model.first_m2m or Model.second_m2m.'),
obj=Model._meta.get_field('first_m2m'),
id='E016',
),
Error(
'Clash between accessors for Model.second_m2m and Model.first_m2m.',
hint=('Add or change a related_name argument to the definition '
'for Model.second_m2m or Model.first_m2m.'),
obj=Model._meta.get_field('second_m2m'),
id='E016',
),
]
self.assertEqual(errors, expected)
def test_accessor_clash(self):
class Model(models.Model):
model_set = models.ManyToManyField("self", symmetrical=False)
errors = Model.check()
expected = [
Error(
'Accessor for field Model.model_set clashes with field Model.model_set.',
hint=('Rename field Model.model_set or add/change '
'a related_name argument to the definition '
'for field Model.model_set.'),
obj=Model._meta.get_field('model_set'),
id='E014',
),
]
self.assertEqual(errors, expected)
def test_reverse_query_name_clash(self):
class Model(models.Model):
model = models.ManyToManyField("self", symmetrical=False)
errors = Model.check()
expected = [
Error(
'Reverse query name for field Model.model clashes with field Model.model.',
hint=('Rename field Model.model or add/change a related_name '
'argument to the definition for field Model.model.'),
obj=Model._meta.get_field('model'),
id='E015',
),
]
self.assertEqual(errors, expected)
def test_clash_under_explicit_related_name(self):
class Model(models.Model):
clash = models.IntegerField()
m2m = models.ManyToManyField("self",
symmetrical=False, related_name='clash')
errors = Model.check()
expected = [
Error(
'Accessor for field Model.m2m clashes with field Model.clash.',
hint=('Rename field Model.clash or add/change a related_name '
'argument to the definition for field Model.m2m.'),
obj=Model._meta.get_field('m2m'),
id='E014',
),
Error(
'Reverse query name for field Model.m2m clashes with field Model.clash.',
hint=('Rename field Model.clash or add/change a related_name '
'argument to the definition for field Model.m2m.'),
obj=Model._meta.get_field('m2m'),
id='E015',
),
]
self.assertEqual(errors, expected)
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')
errors = Model.check()
self.assertEqual(errors, [])
class SelfReferentialFKClashTests(IsolatedModelsTestCase):
def test_accessor_clash(self):
class Model(models.Model):
model_set = models.ForeignKey("Model")
errors = Model.check()
expected = [
Error(
'Accessor for field Model.model_set clashes with field Model.model_set.',
hint=('Rename field Model.model_set or add/change '
'a related_name argument to the definition '
'for field Model.model_set.'),
obj=Model._meta.get_field('model_set'),
id='E014',
),
]
self.assertEqual(errors, expected)
def test_reverse_query_name_clash(self):
class Model(models.Model):
model = models.ForeignKey("Model")
errors = Model.check()
expected = [
Error(
'Reverse query name for field Model.model clashes with field Model.model.',
hint=('Rename field Model.model or add/change '
'a related_name argument to the definition '
'for field Model.model.'),
obj=Model._meta.get_field('model'),
id='E015',
),
]
self.assertEqual(errors, expected)
def test_clash_under_explicit_related_name(self):
class Model(models.Model):
clash = models.CharField(max_length=10)
foreign = models.ForeignKey("Model", related_name='clash')
errors = Model.check()
expected = [
Error(
'Accessor for field Model.foreign clashes with field Model.clash.',
hint=('Rename field Model.clash or add/change '
'a related_name argument to the definition '
'for field Model.foreign.'),
obj=Model._meta.get_field('foreign'),
id='E014',
),
Error(
'Reverse query name for field Model.foreign clashes with field Model.clash.',
hint=('Rename field Model.clash or add/change '
'a related_name argument to the definition '
'for field Model.foreign.'),
obj=Model._meta.get_field('foreign'),
id='E015',
),
]
self.assertEqual(errors, expected)
class ComplexClashTests(IsolatedModelsTestCase):
# 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, related_name='id')
foreign_2 = models.ForeignKey(Target, related_name='src_safe')
m2m_1 = models.ManyToManyField(Target, related_name='id')
m2m_2 = models.ManyToManyField(Target, related_name='src_safe')
errors = Model.check()
expected = [
Error(
'Accessor for field Model.foreign_1 clashes with field Target.id.',
hint=('Rename field Target.id or add/change a related_name '
'argument to the definition for field Model.foreign_1.'),
obj=Model._meta.get_field('foreign_1'),
id='E014',
),
Error(
'Reverse query name for field Model.foreign_1 clashes with field Target.id.',
hint=('Rename field Target.id or add/change a related_name '
'argument to the definition for field Model.foreign_1.'),
obj=Model._meta.get_field('foreign_1'),
id='E015',
),
Error(
'Clash between accessors for Model.foreign_1 and Model.m2m_1.',
hint=('Add or change a related_name argument to '
'the definition for Model.foreign_1 or Model.m2m_1.'),
obj=Model._meta.get_field('foreign_1'),
id='E016',
),
Error(
'Clash between reverse query names for Model.foreign_1 and Model.m2m_1.',
hint=('Add or change a related_name argument to '
'the definition for Model.foreign_1 or Model.m2m_1.'),
obj=Model._meta.get_field('foreign_1'),
id='E017',
),
Error(
'Clash between accessors for Model.foreign_2 and Model.m2m_2.',
hint=('Add or change a related_name argument '
'to the definition for Model.foreign_2 or Model.m2m_2.'),
obj=Model._meta.get_field('foreign_2'),
id='E016',
),
Error(
'Clash between reverse query names for Model.foreign_2 and Model.m2m_2.',
hint=('Add or change a related_name argument to '
'the definition for Model.foreign_2 or Model.m2m_2.'),
obj=Model._meta.get_field('foreign_2'),
id='E017',
),
Error(
'Accessor for field Model.m2m_1 clashes with field Target.id.',
hint=('Rename field Target.id or add/change a related_name '
'argument to the definition for field Model.m2m_1.'),
obj=Model._meta.get_field('m2m_1'),
id='E014',
),
Error(
'Reverse query name for field Model.m2m_1 clashes with field Target.id.',
hint=('Rename field Target.id or add/change a related_name '
'argument to the definition for field Model.m2m_1.'),
obj=Model._meta.get_field('m2m_1'),
id='E015',
),
Error(
'Clash between accessors for Model.m2m_1 and Model.foreign_1.',
hint=('Add or change a related_name argument to the definition '
'for Model.m2m_1 or Model.foreign_1.'),
obj=Model._meta.get_field('m2m_1'),
id='E016',
),
Error(
'Clash between reverse query names for Model.m2m_1 and Model.foreign_1.',
hint=('Add or change a related_name argument to '
'the definition for Model.m2m_1 or Model.foreign_1.'),
obj=Model._meta.get_field('m2m_1'),
id='E017',
),
Error(
'Clash between accessors for Model.m2m_2 and Model.foreign_2.',
hint=('Add or change a related_name argument to the definition '
'for Model.m2m_2 or Model.foreign_2.'),
obj=Model._meta.get_field('m2m_2'),
id='E016',
),
Error(
'Clash between reverse query names for Model.m2m_2 and Model.foreign_2.',
hint=('Add or change a related_name argument to the definition '
'for Model.m2m_2 or Model.foreign_2.'),
obj=Model._meta.get_field('m2m_2'),
id='E017',
),
]
self.assertEqual(errors, expected)