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674 lines
21 KiB
Python
674 lines
21 KiB
Python
# -*- encoding: utf-8 -*-
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from __future__ import unicode_literals
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import unittest
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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 models, connections
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from django.test.utils import override_settings
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from .base import IsolatedModelsTestCase
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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_name:
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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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class IndexTogetherTests(IsolatedModelsTestCase):
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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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hint=None,
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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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hint=None,
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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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hint=None,
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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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hint=None,
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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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hint=None,
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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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class UniqueTogetherTests(IsolatedModelsTestCase):
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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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hint=None,
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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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hint=None,
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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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hint=None,
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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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hint=None,
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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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hint=None,
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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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class FieldNamesTests(IsolatedModelsTestCase):
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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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hint=None,
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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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hint=None,
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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,
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"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(VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz, related_name="rn4")
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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)
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class m2mcomplex(models.Model):
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id2 = models.ForeignKey(ModelWithLongField)
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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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).contribute_to_class(m2msimple, long_field_name)
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models.ForeignKey(
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VeryLongModelNamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
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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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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-genererated 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,
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"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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hint=None,
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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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hint=None,
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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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class ShadowingFieldsTests(IsolatedModelsTestCase):
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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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hint=None,
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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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hint=None,
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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)
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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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hint=None,
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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_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)
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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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hint=None,
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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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class OtherModelTests(IsolatedModelsTestCase):
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def test_unique_primary_key(self):
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invalid_id = models.IntegerField(primary_key=False)
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class Model(models.Model):
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id = invalid_id
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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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hint=None,
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obj=Model,
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id='models.E004',
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),
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]
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self.assertEqual(errors, expected)
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def test_ordering_non_iterable(self):
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class Model(models.Model):
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class Meta:
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ordering = "missing_field"
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errors = Model.check()
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expected = [
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Error(
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("'ordering' must be a tuple or list "
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"(even if you want to order by only one field)."),
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hint=None,
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obj=Model,
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id='models.E014',
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),
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]
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self.assertEqual(errors, expected)
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def test_non_valid(self):
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class RelationModel(models.Model):
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pass
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class Model(models.Model):
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relation = models.ManyToManyField(RelationModel)
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class Meta:
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ordering = ['relation']
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errors = Model.check()
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expected = [
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Error(
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"'ordering' refers to the non-existent field 'relation'.",
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hint=None,
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obj=Model,
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id='models.E015',
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),
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]
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self.assertEqual(errors, expected)
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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'.",
|
|
hint=None,
|
|
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'.",
|
|
hint=None,
|
|
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)
|
|
|
|
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'.",
|
|
hint=None,
|
|
obj=None,
|
|
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.'),
|
|
hint=None,
|
|
obj=None,
|
|
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)
|
|
group = models.ForeignKey(Group)
|
|
|
|
errors = Group.check()
|
|
expected = [
|
|
Error(
|
|
("The model has two many-to-many relations through "
|
|
"the intermediate model 'invalid_models_tests.Membership'."),
|
|
hint=None,
|
|
obj=Group,
|
|
id='models.E003',
|
|
)
|
|
]
|
|
self.assertEqual(errors, expected)
|