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315357ad25
Prior to this change foreign key constraint references could be left pointing at tables dropped during operations simulating unsupported table alterations because of an unexpected failure to disable foreign key constraint checks. SQLite3 does not allow disabling such checks while in a transaction so they must be disabled beforehand. Thanks ezaquarii for the report and Carlton and Tim for the review.
129 lines
5.3 KiB
Python
129 lines
5.3 KiB
Python
from django.apps import apps
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from django.conf import settings
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from django.db import connection
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from django.test import (
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TransactionTestCase, skipIfDBFeature, skipUnlessDBFeature,
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)
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from .models.tablespaces import (
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Article, ArticleRef, Authors, Reviewers, Scientist, ScientistRef,
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)
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def sql_for_table(model):
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with connection.schema_editor(collect_sql=True) as editor:
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editor.create_model(model)
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return editor.collected_sql[0]
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def sql_for_index(model):
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return '\n'.join(str(sql) for sql in connection.schema_editor()._model_indexes_sql(model))
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# We can't test the DEFAULT_TABLESPACE and DEFAULT_INDEX_TABLESPACE settings
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# because they're evaluated when the model class is defined. As a consequence,
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# @override_settings doesn't work, and the tests depend
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class TablespacesTests(TransactionTestCase):
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available_apps = ['model_options']
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def setUp(self):
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# The unmanaged models need to be removed after the test in order to
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# prevent bad interactions with the flush operation in other tests.
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self._old_models = apps.app_configs['model_options'].models.copy()
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for model in Article, Authors, Reviewers, Scientist:
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model._meta.managed = True
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def tearDown(self):
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for model in Article, Authors, Reviewers, Scientist:
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model._meta.managed = False
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apps.app_configs['model_options'].models = self._old_models
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apps.all_models['model_options'] = self._old_models
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apps.clear_cache()
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def assertNumContains(self, haystack, needle, count):
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real_count = haystack.count(needle)
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self.assertEqual(real_count, count, "Found %d instances of '%s', expected %d" % (real_count, needle, count))
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@skipUnlessDBFeature('supports_tablespaces')
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def test_tablespace_for_model(self):
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sql = sql_for_table(Scientist).lower()
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if settings.DEFAULT_INDEX_TABLESPACE:
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# 1 for the table
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self.assertNumContains(sql, 'tbl_tbsp', 1)
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# 1 for the index on the primary key
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self.assertNumContains(sql, settings.DEFAULT_INDEX_TABLESPACE, 1)
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else:
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# 1 for the table + 1 for the index on the primary key
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self.assertNumContains(sql, 'tbl_tbsp', 2)
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@skipIfDBFeature('supports_tablespaces')
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def test_tablespace_ignored_for_model(self):
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# No tablespace-related SQL
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self.assertEqual(sql_for_table(Scientist),
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sql_for_table(ScientistRef))
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@skipUnlessDBFeature('supports_tablespaces')
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def test_tablespace_for_indexed_field(self):
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sql = sql_for_table(Article).lower()
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if settings.DEFAULT_INDEX_TABLESPACE:
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# 1 for the table
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self.assertNumContains(sql, 'tbl_tbsp', 1)
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# 1 for the primary key + 1 for the index on code
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self.assertNumContains(sql, settings.DEFAULT_INDEX_TABLESPACE, 2)
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else:
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# 1 for the table + 1 for the primary key + 1 for the index on code
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self.assertNumContains(sql, 'tbl_tbsp', 3)
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# 1 for the index on reference
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self.assertNumContains(sql, 'idx_tbsp', 1)
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@skipIfDBFeature('supports_tablespaces')
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def test_tablespace_ignored_for_indexed_field(self):
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# No tablespace-related SQL
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self.assertEqual(sql_for_table(Article),
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sql_for_table(ArticleRef))
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@skipUnlessDBFeature('supports_tablespaces')
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def test_tablespace_for_many_to_many_field(self):
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sql = sql_for_table(Authors).lower()
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# The join table of the ManyToManyField goes to the model's tablespace,
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# and its indexes too, unless DEFAULT_INDEX_TABLESPACE is set.
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if settings.DEFAULT_INDEX_TABLESPACE:
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# 1 for the table
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self.assertNumContains(sql, 'tbl_tbsp', 1)
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# 1 for the primary key
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self.assertNumContains(sql, settings.DEFAULT_INDEX_TABLESPACE, 1)
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else:
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# 1 for the table + 1 for the index on the primary key
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self.assertNumContains(sql, 'tbl_tbsp', 2)
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self.assertNumContains(sql, 'idx_tbsp', 0)
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sql = sql_for_index(Authors).lower()
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# The ManyToManyField declares no db_tablespace, its indexes go to
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# the model's tablespace, unless DEFAULT_INDEX_TABLESPACE is set.
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if settings.DEFAULT_INDEX_TABLESPACE:
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self.assertNumContains(sql, settings.DEFAULT_INDEX_TABLESPACE, 2)
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else:
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self.assertNumContains(sql, 'tbl_tbsp', 2)
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self.assertNumContains(sql, 'idx_tbsp', 0)
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sql = sql_for_table(Reviewers).lower()
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# The join table of the ManyToManyField goes to the model's tablespace,
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# and its indexes too, unless DEFAULT_INDEX_TABLESPACE is set.
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if settings.DEFAULT_INDEX_TABLESPACE:
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# 1 for the table
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self.assertNumContains(sql, 'tbl_tbsp', 1)
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# 1 for the primary key
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self.assertNumContains(sql, settings.DEFAULT_INDEX_TABLESPACE, 1)
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else:
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# 1 for the table + 1 for the index on the primary key
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self.assertNumContains(sql, 'tbl_tbsp', 2)
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self.assertNumContains(sql, 'idx_tbsp', 0)
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sql = sql_for_index(Reviewers).lower()
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# The ManyToManyField declares db_tablespace, its indexes go there.
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self.assertNumContains(sql, 'tbl_tbsp', 0)
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self.assertNumContains(sql, 'idx_tbsp', 2)
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