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1475 lines
55 KiB
Python
1475 lines
55 KiB
Python
# -*- encoding: utf-8 -*-
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from __future__ import unicode_literals
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import warnings
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from django.core.checks import Error, Warning as DjangoWarning
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from django.db import models
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from django.db.models.fields.related import ForeignObject
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from django.test import ignore_warnings
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from django.test.testcases import skipIfDBFeature
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from django.test.utils import override_settings
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from django.utils import six
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from django.utils.deprecation import RemovedInDjango20Warning
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from django.utils.version import get_docs_version
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from .base import IsolatedModelsTestCase
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class RelativeFieldTests(IsolatedModelsTestCase):
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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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errors = field.check()
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self.assertEqual(errors, [])
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@ignore_warnings(category=RemovedInDjango20Warning)
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def test_valid_foreign_key_without_on_delete(self):
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class Target(models.Model):
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model = models.IntegerField()
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class Model(models.Model):
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field = models.ForeignKey(Target, related_name='+')
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def test_foreign_key_without_on_delete_warning(self):
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with warnings.catch_warnings(record=True) as warns:
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warnings.simplefilter('always') # prevent warnings from appearing as errors
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class Target(models.Model):
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model = models.IntegerField()
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class Model(models.Model):
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field = models.ForeignKey(Target, related_name='+')
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self.assertEqual(len(warns), 1)
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self.assertEqual(
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str(warns[0].message),
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'on_delete will be a required arg for ForeignKey in Django '
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'2.0. Set it to models.CASCADE if you want to maintain the '
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'current default behavior. See '
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'https://docs.djangoproject.com/en/%s/ref/models/fields/'
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'#django.db.models.ForeignKey.on_delete' % get_docs_version(),
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)
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def test_foreign_key_to_field_as_arg(self):
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with warnings.catch_warnings(record=True) as warns:
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warnings.simplefilter('always') # prevent warnings from appearing as errors
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class Target(models.Model):
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model = models.IntegerField()
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class Model(models.Model):
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field = models.ForeignKey(Target, 'id')
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self.assertEqual(len(warns), 1)
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self.assertEqual(
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str(warns[0].message),
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"The signature for ForeignKey will change in Django 2.0. "
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"Pass to_field='id' as a kwarg instead of as an arg."
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)
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def test_one_to_one_field_without_on_delete_warning(self):
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with warnings.catch_warnings(record=True) as warns:
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warnings.simplefilter('always') # prevent warnings from appearing as errors
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class Target(models.Model):
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model = models.IntegerField()
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class Model(models.Model):
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field = models.OneToOneField(Target, related_name='+')
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self.assertEqual(len(warns), 1)
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self.assertEqual(
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str(warns[0].message),
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'on_delete will be a required arg for OneToOneField in Django '
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'2.0. Set it to models.CASCADE if you want to maintain the '
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'current default behavior. See '
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'https://docs.djangoproject.com/en/%s/ref/models/fields/'
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'#django.db.models.ForeignKey.on_delete' % get_docs_version(),
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)
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def test_one_to_one_field_to_field_as_arg(self):
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with warnings.catch_warnings(record=True) as warns:
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warnings.simplefilter('always') # prevent warnings from appearing as errors
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class Target(models.Model):
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model = models.IntegerField()
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class Model(models.Model):
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field = models.OneToOneField(Target, 'id')
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self.assertEqual(len(warns), 1)
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self.assertEqual(
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str(warns[0].message),
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"The signature for OneToOneField will change in Django 2.0. "
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"Pass to_field='id' as a kwarg instead of as an arg."
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)
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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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errors = field.check()
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expected = [
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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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hint=None,
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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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self.assertEqual(errors, expected)
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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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errors = field.check(from_model=Model)
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expected = [
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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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hint=None,
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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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self.assertEqual(errors, expected)
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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(Model, null=True, validators=[''])
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errors = ModelM2M.check()
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field = ModelM2M._meta.get_field('m2m')
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expected = [
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DjangoWarning(
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'null has no effect on ManyToManyField.',
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hint=None,
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obj=field,
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id='fields.W340',
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)
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]
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expected.append(
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DjangoWarning(
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'ManyToManyField does not support validators.',
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hint=None,
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obj=field,
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id='fields.W341',
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)
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)
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self.assertEqual(errors, expected)
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def test_ambiguous_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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field = models.ManyToManyField('Person',
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through="AmbiguousRelationship", related_name='tertiary')
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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(Person, models.CASCADE, related_name="first")
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second_person = models.ForeignKey(Person, models.CASCADE, related_name="second")
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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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errors = field.check(from_model=Group)
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expected = [
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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=('If you want to create a recursive relationship, use '
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'ForeignKey("self", symmetrical=False, '
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'through="AmbiguousRelationship").'),
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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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self.assertEqual(errors, expected)
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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',
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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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errors = field.check(from_model=Group)
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expected = [
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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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hint=None,
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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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self.assertEqual(errors, expected)
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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',
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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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errors = field.check(from_model=Group)
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expected = [
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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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hint=None,
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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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self.assertEqual(errors, expected)
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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',
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through="MissingM2MModel")
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field = Group._meta.get_field('members')
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errors = field.check(from_model=Group)
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expected = [
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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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hint=None,
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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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self.assertEqual(errors, expected)
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def test_symmetrical_self_referential_field(self):
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class Person(models.Model):
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# Implicit symmetrical=False.
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friends = models.ManyToManyField('self', through="Relationship")
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class Relationship(models.Model):
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first = models.ForeignKey(Person, models.CASCADE, related_name="rel_from_set")
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second = models.ForeignKey(Person, models.CASCADE, related_name="rel_to_set")
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field = Person._meta.get_field('friends')
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errors = field.check(from_model=Person)
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expected = [
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Error(
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'Many-to-many fields with intermediate tables must not be symmetrical.',
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hint=None,
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obj=field,
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id='fields.E332',
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),
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]
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self.assertEqual(errors, expected)
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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('self',
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through="InvalidRelationship", symmetrical=False)
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class InvalidRelationship(models.Model):
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first = models.ForeignKey(Person, models.CASCADE, related_name="rel_from_set_2")
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second = models.ForeignKey(Person, models.CASCADE, related_name="rel_to_set_2")
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third = models.ForeignKey(Person, models.CASCADE, related_name="too_many_by_far")
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field = Person._meta.get_field('friends')
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errors = field.check(from_model=Person)
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expected = [
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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='Use through_fields to specify which two foreign keys Django should use.',
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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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self.assertEqual(errors, expected)
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def test_symmetric_self_reference_with_intermediate_table(self):
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class Person(models.Model):
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# Explicit symmetrical=True.
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friends = models.ManyToManyField('self',
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through="Relationship", symmetrical=True)
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class Relationship(models.Model):
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first = models.ForeignKey(Person, models.CASCADE, related_name="rel_from_set")
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second = models.ForeignKey(Person, models.CASCADE, related_name="rel_to_set")
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field = Person._meta.get_field('friends')
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errors = field.check(from_model=Person)
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expected = [
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Error(
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'Many-to-many fields with intermediate tables must not be symmetrical.',
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hint=None,
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obj=field,
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id='fields.E332',
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),
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]
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self.assertEqual(errors, expected)
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def test_symmetric_self_reference_with_intermediate_table_and_through_fields(self):
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"""
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Using through_fields in a m2m with an intermediate model shouldn't
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mask its incompatibility with symmetry.
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"""
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class Person(models.Model):
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# Explicit symmetrical=True.
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friends = models.ManyToManyField('self',
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symmetrical=True,
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through="Relationship",
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through_fields=('first', 'second'))
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class Relationship(models.Model):
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first = models.ForeignKey(Person, models.CASCADE, related_name="rel_from_set")
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second = models.ForeignKey(Person, models.CASCADE, related_name="rel_to_set")
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referee = models.ForeignKey(Person, models.CASCADE, related_name="referred")
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field = Person._meta.get_field('friends')
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errors = field.check(from_model=Person)
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expected = [
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Error(
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'Many-to-many fields with intermediate tables must not be symmetrical.',
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hint=None,
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obj=field,
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id='fields.E332',
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),
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]
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self.assertEqual(errors, expected)
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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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errors = field.check()
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self.assertEqual(errors, [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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errors = field.check(from_model=Model)
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self.assertEqual(errors, [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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errors = field.check(from_model=Group)
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expected = [
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Error(
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'ManyToManyFields cannot be unique.',
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hint=None,
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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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self.assertEqual(errors, expected)
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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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errors = field.check()
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expected = [
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Error(
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"'Target.bad' must set unique=True because it is referenced by a foreign key.",
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||
hint=None,
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obj=field,
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id='fields.E311',
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),
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]
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self.assertEqual(errors, expected)
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||
|
||
def test_foreign_key_to_non_unique_field_under_explicit_model(self):
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||
class Target(models.Model):
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||
bad = models.IntegerField()
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||
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||
class Model(models.Model):
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||
field = models.ForeignKey(Target, models.CASCADE, to_field='bad')
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field = Model._meta.get_field('field')
|
||
errors = field.check()
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expected = [
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Error(
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||
"'Target.bad' must set unique=True because it is referenced by a foreign key.",
|
||
hint=None,
|
||
obj=field,
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||
id='fields.E311',
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||
),
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||
]
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||
self.assertEqual(errors, expected)
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||
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||
def test_foreign_object_to_non_unique_fields(self):
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||
class Person(models.Model):
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# Note that both fields are not unique.
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||
country_id = models.IntegerField()
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||
city_id = models.IntegerField()
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||
|
||
class MMembership(models.Model):
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||
person_country_id = models.IntegerField()
|
||
person_city_id = models.IntegerField()
|
||
|
||
person = models.ForeignObject(Person,
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||
on_delete=models.CASCADE,
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||
from_fields=['person_country_id', 'person_city_id'],
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||
to_fields=['country_id', 'city_id'])
|
||
|
||
field = MMembership._meta.get_field('person')
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||
errors = field.check()
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||
expected = [
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||
Error(
|
||
"No subset of the fields 'country_id', 'city_id' on model 'Person' is unique.",
|
||
hint=(
|
||
"Add unique=True on any of those fields or add at least "
|
||
"a subset of them to a unique_together constraint."
|
||
),
|
||
obj=field,
|
||
id='fields.E310',
|
||
)
|
||
]
|
||
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', models.SET_NULL)
|
||
|
||
field = Model._meta.get_field('foreign_key')
|
||
errors = field.check()
|
||
expected = [
|
||
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',
|
||
),
|
||
]
|
||
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', models.SET_DEFAULT)
|
||
|
||
field = Model._meta.get_field('foreign_key')
|
||
errors = field.check()
|
||
expected = [
|
||
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',
|
||
),
|
||
]
|
||
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='fields.E007',
|
||
),
|
||
]
|
||
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,
|
||
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
|
||
errors = field.check(from_model=Model)
|
||
self.assertEqual(errors, [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',
|
||
]
|
||
# Python 2 crashes on non-ASCII strings.
|
||
if six.PY3:
|
||
invalid_related_names.append('，')
|
||
|
||
class Parent(models.Model):
|
||
pass
|
||
|
||
for invalid_related_name in invalid_related_names:
|
||
Child = type(str('Child_%s') % str(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')
|
||
errors = Child.check()
|
||
expected = [
|
||
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',
|
||
),
|
||
]
|
||
self.assertEqual(errors, expected)
|
||
|
||
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+',
|
||
'_',
|
||
'_+',
|
||
'+',
|
||
]
|
||
# Python 2 crashes on non-ASCII strings.
|
||
if six.PY3:
|
||
related_names.extend(['試', '試驗+'])
|
||
|
||
class Parent(models.Model):
|
||
pass
|
||
|
||
for related_name in related_names:
|
||
Child = type(str('Child_%s') % str(related_name), (models.Model,), {
|
||
'parent': models.ForeignKey('Parent', models.CASCADE, related_name=related_name),
|
||
'__module__': Parent.__module__,
|
||
})
|
||
|
||
errors = Child.check()
|
||
self.assertFalse(errors)
|
||
|
||
|
||
class AccessorClashTests(IsolatedModelsTestCase):
|
||
|
||
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
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse accessor for 'Model.rel' clashes with field name '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='fields.E302',
|
||
),
|
||
]
|
||
self.assertEqual(errors, expected)
|
||
|
||
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)
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse accessor for 'Model.foreign' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
Error(
|
||
"Reverse accessor for 'Model.m2m' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
]
|
||
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(
|
||
"Reverse accessor for 'Model.children' clashes with field name '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='fields.E302',
|
||
)
|
||
]
|
||
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', 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
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse query name for 'Model.rel' clashes with field name '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='fields.E303',
|
||
),
|
||
]
|
||
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', 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
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse accessor for 'Model.rel' clashes with field name '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='fields.E302',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.rel' clashes with field name '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='fields.E303',
|
||
),
|
||
]
|
||
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',
|
||
models.CASCADE,
|
||
related_query_name='clash'))
|
||
|
||
def test_fk_to_fk(self):
|
||
self._test_explicit_related_query_name_clash(
|
||
target=models.ForeignKey('Another', models.CASCADE),
|
||
relative=models.ForeignKey('Target',
|
||
models.CASCADE,
|
||
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',
|
||
models.CASCADE,
|
||
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', models.CASCADE),
|
||
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 'Model.rel' clashes with field name '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='fields.E303',
|
||
),
|
||
]
|
||
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(
|
||
"Reverse accessor for 'Model.first_m2m' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
Error(
|
||
"Reverse accessor for 'Model.second_m2m' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
]
|
||
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(
|
||
"Reverse accessor for 'Model.model_set' clashes with field name '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='fields.E302',
|
||
),
|
||
]
|
||
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 'Model.model' clashes with field name '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='fields.E303',
|
||
),
|
||
]
|
||
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(
|
||
"Reverse accessor for 'Model.m2m' clashes with field name '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='fields.E302',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.m2m' clashes with field name '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='fields.E303',
|
||
),
|
||
]
|
||
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", models.CASCADE)
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse accessor for 'Model.model_set' clashes with field name '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='fields.E302',
|
||
),
|
||
]
|
||
self.assertEqual(errors, expected)
|
||
|
||
def test_reverse_query_name_clash(self):
|
||
class Model(models.Model):
|
||
model = models.ForeignKey("Model", models.CASCADE)
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse query name for 'Model.model' clashes with field name '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='fields.E303',
|
||
),
|
||
]
|
||
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", models.CASCADE, related_name='clash')
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse accessor for 'Model.foreign' clashes with field name '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='fields.E302',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.foreign' clashes with field name '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='fields.E303',
|
||
),
|
||
]
|
||
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, 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')
|
||
|
||
errors = Model.check()
|
||
expected = [
|
||
Error(
|
||
"Reverse accessor for 'Model.foreign_1' clashes with field name '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='fields.E302',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.foreign_1' clashes with field name '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='fields.E303',
|
||
),
|
||
Error(
|
||
"Reverse accessor for 'Model.foreign_1' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.foreign_1' clashes with reverse query name for '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='fields.E305',
|
||
),
|
||
|
||
Error(
|
||
"Reverse accessor for 'Model.foreign_2' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.foreign_2' clashes with reverse query name for '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='fields.E305',
|
||
),
|
||
|
||
Error(
|
||
"Reverse accessor for 'Model.m2m_1' clashes with field name '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='fields.E302',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.m2m_1' clashes with field name '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='fields.E303',
|
||
),
|
||
Error(
|
||
"Reverse accessor for 'Model.m2m_1' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.m2m_1' clashes with reverse query name for '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='fields.E305',
|
||
),
|
||
|
||
Error(
|
||
"Reverse accessor for 'Model.m2m_2' clashes with reverse accessor for '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='fields.E304',
|
||
),
|
||
Error(
|
||
"Reverse query name for 'Model.m2m_2' clashes with reverse query name for '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='fields.E305',
|
||
),
|
||
]
|
||
self.assertEqual(errors, expected)
|
||
|
||
|
||
class M2mThroughFieldsTests(IsolatedModelsTestCase):
|
||
def test_m2m_field_argument_validation(self):
|
||
"""
|
||
Tests that ManyToManyField accepts the ``through_fields`` kwarg
|
||
only if an intermediary table is specified.
|
||
"""
|
||
class Fan(models.Model):
|
||
pass
|
||
|
||
self.assertRaisesMessage(
|
||
ValueError, 'Cannot specify through_fields without a through model',
|
||
models.ManyToManyField, Fan, through_fields=('f1', 'f2'))
|
||
|
||
def test_invalid_order(self):
|
||
"""
|
||
Tests that 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')
|
||
errors = field.check(from_model=Event)
|
||
expected = [
|
||
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'),
|
||
]
|
||
self.assertEqual(expected, errors)
|
||
|
||
def test_invalid_field(self):
|
||
"""
|
||
Tests that 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')
|
||
errors = field.check(from_model=Event)
|
||
expected = [
|
||
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'),
|
||
]
|
||
self.assertEqual(expected, errors)
|
||
|
||
def test_explicit_field_names(self):
|
||
"""
|
||
Tests that 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')
|
||
errors = field.check(from_model=Event)
|
||
expected = [
|
||
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')]
|
||
self.assertEqual(expected, errors)
|
||
|
||
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 = ForeignObject(
|
||
Parent,
|
||
on_delete=models.SET_NULL,
|
||
from_fields=('a', 'b'),
|
||
to_fields=('a', 'b'),
|
||
related_name='children',
|
||
)
|
||
|
||
field = Child._meta.get_field('parent')
|
||
errors = field.check(from_model=Child)
|
||
expected = [
|
||
Error(
|
||
"No subset of the fields 'a', 'b' on model 'Parent' is unique.",
|
||
hint=(
|
||
"Add unique=True on any of those fields or add at least "
|
||
"a subset of them to a unique_together constraint."
|
||
),
|
||
obj=field,
|
||
id='fields.E310',
|
||
),
|
||
]
|
||
self.assertEqual(expected, errors)
|
||
|
||
def test_insersection_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 = 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')
|
||
errors = field.check(from_model=Child)
|
||
expected = [
|
||
Error(
|
||
"No subset of the fields 'a', 'b', 'd' on model 'Parent' is unique.",
|
||
hint=(
|
||
"Add unique=True on any of those fields or add at least "
|
||
"a subset of them to a unique_together constraint."
|
||
),
|
||
obj=field,
|
||
id='fields.E310',
|
||
),
|
||
]
|
||
self.assertEqual(expected, errors)
|