764 lines
24 KiB
Python
764 lines
24 KiB
Python
# -*- encoding: utf-8 -*-
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from __future__ import unicode_literals
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import unittest
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import warnings
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from django.conf import settings
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from django.core.checks import Error
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from django.db import connections, models
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from django.test import SimpleTestCase
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from django.test.utils import isolate_apps, override_settings
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def get_max_column_name_length():
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allowed_len = None
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db_alias = None
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for db in settings.DATABASES.keys():
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connection = connections[db]
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max_name_length = connection.ops.max_name_length()
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if max_name_length is None or connection.features.truncates_names:
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continue
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else:
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if allowed_len is None:
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allowed_len = max_name_length
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db_alias = db
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elif max_name_length < allowed_len:
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allowed_len = max_name_length
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db_alias = db
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return (allowed_len, db_alias)
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@isolate_apps('invalid_models_tests')
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class IndexTogetherTests(SimpleTestCase):
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def test_non_iterable(self):
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class Model(models.Model):
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class Meta:
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index_together = 42
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errors = Model.check()
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expected = [
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Error(
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"'index_together' must be a list or tuple.",
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obj=Model,
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id='models.E008',
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),
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]
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self.assertEqual(errors, expected)
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def test_non_list(self):
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class Model(models.Model):
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class Meta:
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index_together = 'not-a-list'
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errors = Model.check()
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expected = [
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Error(
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"'index_together' must be a list or tuple.",
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obj=Model,
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id='models.E008',
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),
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]
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self.assertEqual(errors, expected)
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def test_list_containing_non_iterable(self):
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class Model(models.Model):
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class Meta:
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index_together = [('a', 'b'), 42]
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errors = Model.check()
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expected = [
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Error(
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"All 'index_together' elements must be lists or tuples.",
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obj=Model,
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id='models.E009',
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),
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]
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self.assertEqual(errors, expected)
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def test_pointing_to_missing_field(self):
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class Model(models.Model):
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class Meta:
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index_together = [
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["missing_field"],
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]
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errors = Model.check()
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expected = [
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Error(
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"'index_together' refers to the non-existent field 'missing_field'.",
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obj=Model,
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id='models.E012',
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),
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]
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self.assertEqual(errors, expected)
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def test_pointing_to_non_local_field(self):
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class Foo(models.Model):
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field1 = models.IntegerField()
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class Bar(Foo):
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field2 = models.IntegerField()
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class Meta:
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index_together = [
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["field2", "field1"],
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]
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errors = Bar.check()
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expected = [
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Error(
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"'index_together' refers to field 'field1' which is not "
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"local to model 'Bar'.",
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hint=("This issue may be caused by multi-table inheritance."),
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obj=Bar,
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id='models.E016',
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),
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]
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self.assertEqual(errors, expected)
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def test_pointing_to_m2m_field(self):
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class Model(models.Model):
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m2m = models.ManyToManyField('self')
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class Meta:
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index_together = [
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["m2m"],
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]
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errors = Model.check()
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expected = [
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Error(
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"'index_together' refers to a ManyToManyField 'm2m', but "
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"ManyToManyFields are not permitted in 'index_together'.",
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obj=Model,
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id='models.E013',
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),
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]
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self.assertEqual(errors, expected)
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# unique_together tests are very similar to index_together tests.
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@isolate_apps('invalid_models_tests')
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class UniqueTogetherTests(SimpleTestCase):
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def test_non_iterable(self):
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class Model(models.Model):
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class Meta:
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unique_together = 42
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errors = Model.check()
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expected = [
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Error(
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"'unique_together' must be a list or tuple.",
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obj=Model,
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id='models.E010',
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),
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]
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self.assertEqual(errors, expected)
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def test_list_containing_non_iterable(self):
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class Model(models.Model):
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one = models.IntegerField()
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two = models.IntegerField()
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class Meta:
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unique_together = [('a', 'b'), 42]
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errors = Model.check()
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expected = [
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Error(
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"All 'unique_together' elements must be lists or tuples.",
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obj=Model,
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id='models.E011',
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),
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]
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self.assertEqual(errors, expected)
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def test_non_list(self):
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class Model(models.Model):
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class Meta:
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unique_together = 'not-a-list'
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errors = Model.check()
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expected = [
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Error(
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"'unique_together' must be a list or tuple.",
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obj=Model,
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id='models.E010',
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),
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]
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self.assertEqual(errors, expected)
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def test_valid_model(self):
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class Model(models.Model):
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one = models.IntegerField()
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two = models.IntegerField()
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class Meta:
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# unique_together can be a simple tuple
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unique_together = ('one', 'two')
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errors = Model.check()
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self.assertEqual(errors, [])
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def test_pointing_to_missing_field(self):
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class Model(models.Model):
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class Meta:
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unique_together = [
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["missing_field"],
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]
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errors = Model.check()
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expected = [
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Error(
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"'unique_together' refers to the non-existent field 'missing_field'.",
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obj=Model,
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id='models.E012',
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),
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]
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self.assertEqual(errors, expected)
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def test_pointing_to_m2m(self):
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class Model(models.Model):
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m2m = models.ManyToManyField('self')
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class Meta:
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unique_together = [
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["m2m"],
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]
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errors = Model.check()
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expected = [
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Error(
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"'unique_together' refers to a ManyToManyField 'm2m', but "
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"ManyToManyFields are not permitted in 'unique_together'.",
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obj=Model,
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id='models.E013',
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),
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]
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self.assertEqual(errors, expected)
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@isolate_apps('invalid_models_tests')
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class FieldNamesTests(SimpleTestCase):
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def test_ending_with_underscore(self):
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class Model(models.Model):
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field_ = models.CharField(max_length=10)
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m2m_ = models.ManyToManyField('self')
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errors = Model.check()
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expected = [
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Error(
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'Field names must not end with an underscore.',
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obj=Model._meta.get_field('field_'),
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id='fields.E001',
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),
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Error(
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'Field names must not end with an underscore.',
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obj=Model._meta.get_field('m2m_'),
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id='fields.E001',
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),
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]
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self.assertEqual(errors, expected)
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max_column_name_length, column_limit_db_alias = get_max_column_name_length()
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@unittest.skipIf(max_column_name_length is None, "The database doesn't have a column name length limit.")
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def test_M2M_long_column_name(self):
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"""
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#13711 -- Model check for long M2M column names when database has
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column name length limits.
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"""
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allowed_len, db_alias = get_max_column_name_length()
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# A model with very long name which will be used to set relations to.
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class VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz(models.Model):
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title = models.CharField(max_length=11)
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# Main model for which checks will be performed.
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class ModelWithLongField(models.Model):
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m2m_field = models.ManyToManyField(
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VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
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related_name="rn1"
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)
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m2m_field2 = models.ManyToManyField(
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VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
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related_name="rn2", through='m2msimple'
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)
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m2m_field3 = models.ManyToManyField(
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VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
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related_name="rn3",
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through='m2mcomplex'
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)
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fk = models.ForeignKey(
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VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
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models.CASCADE,
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related_name="rn4",
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)
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# Models used for setting `through` in M2M field.
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class m2msimple(models.Model):
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id2 = models.ForeignKey(ModelWithLongField, models.CASCADE)
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class m2mcomplex(models.Model):
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id2 = models.ForeignKey(ModelWithLongField, models.CASCADE)
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long_field_name = 'a' * (self.max_column_name_length + 1)
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models.ForeignKey(
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VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
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models.CASCADE,
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).contribute_to_class(m2msimple, long_field_name)
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models.ForeignKey(
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VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
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models.CASCADE,
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db_column=long_field_name
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).contribute_to_class(m2mcomplex, long_field_name)
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errors = ModelWithLongField.check()
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# First error because of M2M field set on the model with long name.
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m2m_long_name = "verylongmodelnamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz_id"
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if self.max_column_name_length > len(m2m_long_name):
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# Some databases support names longer than the test name.
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expected = []
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else:
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expected = [
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Error(
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'Autogenerated column name too long for M2M field "%s". '
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'Maximum length is "%s" for database "%s".'
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% (m2m_long_name, self.max_column_name_length, self.column_limit_db_alias),
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hint="Use 'through' to create a separate model for "
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"M2M and then set column_name using 'db_column'.",
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obj=ModelWithLongField,
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id='models.E019',
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)
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]
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# Second error because the FK specified in the `through` model
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# `m2msimple` has auto-generated name longer than allowed.
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# There will be no check errors in the other M2M because it
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# specifies db_column for the FK in `through` model even if the actual
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# name is longer than the limits of the database.
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expected.append(
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Error(
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'Autogenerated column name too long for M2M field "%s_id". '
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'Maximum length is "%s" for database "%s".'
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% (long_field_name, self.max_column_name_length, self.column_limit_db_alias),
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hint="Use 'through' to create a separate model for "
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"M2M and then set column_name using 'db_column'.",
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obj=ModelWithLongField,
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id='models.E019',
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)
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)
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self.assertEqual(errors, expected)
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@unittest.skipIf(max_column_name_length is None, "The database doesn't have a column name length limit.")
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def test_local_field_long_column_name(self):
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"""
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#13711 -- Model check for long column names
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when database does not support long names.
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"""
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allowed_len, db_alias = get_max_column_name_length()
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class ModelWithLongField(models.Model):
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title = models.CharField(max_length=11)
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long_field_name = 'a' * (self.max_column_name_length + 1)
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long_field_name2 = 'b' * (self.max_column_name_length + 1)
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models.CharField(max_length=11).contribute_to_class(ModelWithLongField, long_field_name)
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models.CharField(max_length=11, db_column='vlmn').contribute_to_class(ModelWithLongField, long_field_name2)
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errors = ModelWithLongField.check()
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# Error because of the field with long name added to the model
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# without specifying db_column
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expected = [
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Error(
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'Autogenerated column name too long for field "%s". '
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'Maximum length is "%s" for database "%s".'
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% (long_field_name, self.max_column_name_length, self.column_limit_db_alias),
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hint="Set the column name manually using 'db_column'.",
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obj=ModelWithLongField,
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id='models.E018',
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)
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]
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self.assertEqual(errors, expected)
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def test_including_separator(self):
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class Model(models.Model):
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some__field = models.IntegerField()
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errors = Model.check()
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expected = [
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Error(
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'Field names must not contain "__".',
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obj=Model._meta.get_field('some__field'),
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id='fields.E002',
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)
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]
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self.assertEqual(errors, expected)
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def test_pk(self):
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class Model(models.Model):
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pk = models.IntegerField()
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errors = Model.check()
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expected = [
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Error(
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"'pk' is a reserved word that cannot be used as a field name.",
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obj=Model._meta.get_field('pk'),
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id='fields.E003',
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)
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]
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self.assertEqual(errors, expected)
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@isolate_apps('invalid_models_tests')
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class ShadowingFieldsTests(SimpleTestCase):
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def test_field_name_clash_with_child_accessor(self):
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class Parent(models.Model):
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pass
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class Child(Parent):
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child = models.CharField(max_length=100)
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errors = Child.check()
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expected = [
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Error(
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"The field 'child' clashes with the field "
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"'child' from model 'invalid_models_tests.parent'.",
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obj=Child._meta.get_field('child'),
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id='models.E006',
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)
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]
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self.assertEqual(errors, expected)
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def test_multiinheritance_clash(self):
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class Mother(models.Model):
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clash = models.IntegerField()
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class Father(models.Model):
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clash = models.IntegerField()
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class Child(Mother, Father):
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# Here we have two clashed: id (automatic field) and clash, because
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# both parents define these fields.
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pass
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errors = Child.check()
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expected = [
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Error(
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"The field 'id' from parent model "
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"'invalid_models_tests.mother' clashes with the field 'id' "
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"from parent model 'invalid_models_tests.father'.",
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obj=Child,
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id='models.E005',
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),
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Error(
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"The field 'clash' from parent model "
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"'invalid_models_tests.mother' clashes with the field 'clash' "
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"from parent model 'invalid_models_tests.father'.",
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obj=Child,
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id='models.E005',
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)
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]
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self.assertEqual(errors, expected)
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def test_inheritance_clash(self):
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class Parent(models.Model):
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f_id = models.IntegerField()
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class Target(models.Model):
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# This field doesn't result in a clash.
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f_id = models.IntegerField()
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class Child(Parent):
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# This field clashes with parent "f_id" field.
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f = models.ForeignKey(Target, models.CASCADE)
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errors = Child.check()
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expected = [
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Error(
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"The field 'f' clashes with the field 'f_id' "
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"from model 'invalid_models_tests.parent'.",
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obj=Child._meta.get_field('f'),
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id='models.E006',
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)
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]
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self.assertEqual(errors, expected)
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def test_multigeneration_inheritance(self):
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class GrandParent(models.Model):
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clash = models.IntegerField()
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class Parent(GrandParent):
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pass
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class Child(Parent):
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pass
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class GrandChild(Child):
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clash = models.IntegerField()
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errors = GrandChild.check()
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expected = [
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Error(
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"The field 'clash' clashes with the field 'clash' "
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"from model 'invalid_models_tests.grandparent'.",
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obj=GrandChild._meta.get_field('clash'),
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id='models.E006',
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)
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]
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self.assertEqual(errors, expected)
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def test_id_clash(self):
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class Target(models.Model):
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pass
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class Model(models.Model):
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fk = models.ForeignKey(Target, models.CASCADE)
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fk_id = models.IntegerField()
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errors = Model.check()
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expected = [
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Error(
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"The field 'fk_id' clashes with the field 'fk' from model "
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"'invalid_models_tests.model'.",
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obj=Model._meta.get_field('fk_id'),
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id='models.E006',
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)
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]
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self.assertEqual(errors, expected)
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|
|
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|
@isolate_apps('invalid_models_tests')
|
|
class OtherModelTests(SimpleTestCase):
|
|
|
|
def test_unique_primary_key(self):
|
|
invalid_id = models.IntegerField(primary_key=False)
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|
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class Model(models.Model):
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id = invalid_id
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|
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errors = Model.check()
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expected = [
|
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Error(
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|
"'id' can only be used as a field name if the field also sets "
|
|
"'primary_key=True'.",
|
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obj=Model,
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|
id='models.E004',
|
|
),
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_ordering_non_iterable(self):
|
|
class Model(models.Model):
|
|
class Meta:
|
|
ordering = "missing_field"
|
|
|
|
errors = Model.check()
|
|
expected = [
|
|
Error(
|
|
"'ordering' must be a tuple or list "
|
|
"(even if you want to order by only one field).",
|
|
obj=Model,
|
|
id='models.E014',
|
|
),
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_just_ordering_no_errors(self):
|
|
class Model(models.Model):
|
|
order = models.PositiveIntegerField()
|
|
|
|
class Meta:
|
|
ordering = ['order']
|
|
|
|
self.assertEqual(Model.check(), [])
|
|
|
|
def test_just_order_with_respect_to_no_errors(self):
|
|
class Question(models.Model):
|
|
pass
|
|
|
|
class Answer(models.Model):
|
|
question = models.ForeignKey(Question, models.CASCADE)
|
|
|
|
class Meta:
|
|
order_with_respect_to = 'question'
|
|
|
|
self.assertEqual(Answer.check(), [])
|
|
|
|
def test_ordering_with_order_with_respect_to(self):
|
|
class Question(models.Model):
|
|
pass
|
|
|
|
class Answer(models.Model):
|
|
question = models.ForeignKey(Question, models.CASCADE)
|
|
order = models.IntegerField()
|
|
|
|
class Meta:
|
|
order_with_respect_to = 'question'
|
|
ordering = ['order']
|
|
|
|
errors = Answer.check()
|
|
expected = [
|
|
Error(
|
|
"'ordering' and 'order_with_respect_to' cannot be used together.",
|
|
obj=Answer,
|
|
id='models.E021',
|
|
),
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_non_valid(self):
|
|
class RelationModel(models.Model):
|
|
pass
|
|
|
|
class Model(models.Model):
|
|
relation = models.ManyToManyField(RelationModel)
|
|
|
|
class Meta:
|
|
ordering = ['relation']
|
|
|
|
errors = Model.check()
|
|
expected = [
|
|
Error(
|
|
"'ordering' refers to the non-existent field 'relation'.",
|
|
obj=Model,
|
|
id='models.E015',
|
|
),
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_ordering_pointing_to_missing_field(self):
|
|
class Model(models.Model):
|
|
class Meta:
|
|
ordering = ("missing_field",)
|
|
|
|
errors = Model.check()
|
|
expected = [
|
|
Error(
|
|
"'ordering' refers to the non-existent field 'missing_field'.",
|
|
obj=Model,
|
|
id='models.E015',
|
|
)
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_ordering_pointing_to_missing_foreignkey_field(self):
|
|
# refs #22711
|
|
|
|
class Model(models.Model):
|
|
missing_fk_field = models.IntegerField()
|
|
|
|
class Meta:
|
|
ordering = ("missing_fk_field_id",)
|
|
|
|
errors = Model.check()
|
|
expected = [
|
|
Error(
|
|
"'ordering' refers to the non-existent field 'missing_fk_field_id'.",
|
|
obj=Model,
|
|
id='models.E015',
|
|
)
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_ordering_pointing_to_existing_foreignkey_field(self):
|
|
# refs #22711
|
|
|
|
class Parent(models.Model):
|
|
pass
|
|
|
|
class Child(models.Model):
|
|
parent = models.ForeignKey(Parent, models.CASCADE)
|
|
|
|
class Meta:
|
|
ordering = ("parent_id",)
|
|
|
|
self.assertFalse(Child.check())
|
|
|
|
@override_settings(TEST_SWAPPED_MODEL_BAD_VALUE='not-a-model')
|
|
def test_swappable_missing_app_name(self):
|
|
class Model(models.Model):
|
|
class Meta:
|
|
swappable = 'TEST_SWAPPED_MODEL_BAD_VALUE'
|
|
|
|
errors = Model.check()
|
|
expected = [
|
|
Error(
|
|
"'TEST_SWAPPED_MODEL_BAD_VALUE' is not of the form 'app_label.app_name'.",
|
|
id='models.E001',
|
|
),
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
@override_settings(TEST_SWAPPED_MODEL_BAD_MODEL='not_an_app.Target')
|
|
def test_swappable_missing_app(self):
|
|
class Model(models.Model):
|
|
class Meta:
|
|
swappable = 'TEST_SWAPPED_MODEL_BAD_MODEL'
|
|
|
|
errors = Model.check()
|
|
expected = [
|
|
Error(
|
|
"'TEST_SWAPPED_MODEL_BAD_MODEL' references 'not_an_app.Target', "
|
|
'which has not been installed, or is abstract.',
|
|
id='models.E002',
|
|
),
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_two_m2m_through_same_relationship(self):
|
|
class Person(models.Model):
|
|
pass
|
|
|
|
class Group(models.Model):
|
|
primary = models.ManyToManyField(Person, through="Membership", related_name="primary")
|
|
secondary = models.ManyToManyField(Person, through="Membership", related_name="secondary")
|
|
|
|
class Membership(models.Model):
|
|
person = models.ForeignKey(Person, models.CASCADE)
|
|
group = models.ForeignKey(Group, models.CASCADE)
|
|
|
|
errors = Group.check()
|
|
expected = [
|
|
Error(
|
|
"The model has two many-to-many relations through "
|
|
"the intermediate model 'invalid_models_tests.Membership'.",
|
|
obj=Group,
|
|
id='models.E003',
|
|
)
|
|
]
|
|
self.assertEqual(errors, expected)
|
|
|
|
def test_missing_parent_link(self):
|
|
with warnings.catch_warnings(record=True) as warns:
|
|
warnings.simplefilter('always')
|
|
|
|
class Place(models.Model):
|
|
pass
|
|
|
|
class ParkingLot(Place):
|
|
# In lieu of any other connector, an existing OneToOneField will be
|
|
# promoted to the primary key.
|
|
parent = models.OneToOneField(Place, models.CASCADE)
|
|
|
|
self.assertEqual(len(warns), 1)
|
|
msg = str(warns[0].message)
|
|
self.assertEqual(
|
|
msg,
|
|
'Add parent_link=True to invalid_models_tests.ParkingLot.parent '
|
|
'as an implicit link is deprecated.'
|
|
)
|
|
self.assertEqual(ParkingLot._meta.pk.name, 'parent')
|