Fixed a test failure introduced at r16987. Refs #12308.

# Since the test database doesn't have tablespaces, it's impossible for Django

# to create the tables for models where db_tablespace is set. To avoid this

# problem, we mark the models as unmanaged, and temporarily revert them to

# managed during each tes. See setUp and tearDown -- it isn't possible to use

# setUpClass and tearDownClass because they're called before Django flushes the

# tables, so Django attempts to flush a non-existing table.

# managed during each test. We also set them to use the same tables as the

# "reference" models to avoid errors when other tests run 'syncdb'

# (proxy_models_inheritance does).

class ScientistRef(models.Model):

    name = models.CharField(max_length=50)

class Scientist(models.Model):

    name = models.CharField(max_length=50)

    class Meta:

        db_table = 'tablespaces_scientistref'

        db_tablespace = 'tbl_tbsp'

        managed = False

    authors = models.ManyToManyField(Scientist, related_name='articles_written_set')

    reviewers = models.ManyToManyField(Scientist, related_name='articles_reviewed_set', db_tablespace='idx_tbsp')

    class Meta:

        db_table = 'tablespaces_articleref'

        db_tablespace = 'tbl_tbsp'

        managed = False

# Also set the tables for automatically created models

Authors = Article._meta.get_field('authors').rel.through

Authors._meta.db_table = 'tablespaces_articleref_authors'

Reviewers = Article._meta.get_field('reviewers').rel.through

Reviewers._meta.db_table = 'tablespaces_articleref_reviewers'

from django.core.management.color import no_style 

from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature

from models import Article, ArticleRef, Scientist, ScientistRef

# Automatically created models

Authors = Article._meta.get_field('authors').rel.through

Reviewers = Article._meta.get_field('reviewers').rel.through

from models import Article, ArticleRef, Authors, Reviewers, Scientist, ScientistRef

# We can't test the DEFAULT_TABLESPACE and DEFAULT_INDEX_TABLESPACE settings

# because they're evaluated when the model class is defined. As a consequence,

    def setUp(self):

        # The unmanaged models need to be removed after the test in order to

        # prevent bad interactions with other tests (proxy_models_inheritance).

        # prevent bad interactions with the flush operation in other tests.

        self.old_app_models = copy.deepcopy(cache.app_models)

        self.old_app_store = copy.deepcopy(cache.app_store)

    def test_tablespace_ignored_for_model(self):

        # No tablespace-related SQL

        self.assertEqual(sql_for_table(Scientist),

                         sql_for_table(ScientistRef).replace('ref', ''))

                         sql_for_table(ScientistRef))

    @skipUnlessDBFeature('supports_tablespaces')

    def test_tablespace_for_indexed_field(self):

    def test_tablespace_ignored_for_indexed_field(self):

        # No tablespace-related SQL

        self.assertEqual(sql_for_table(Article),

                         sql_for_table(ArticleRef).replace('ref', ''))

                         sql_for_table(ArticleRef))

    @skipUnlessDBFeature('supports_tablespaces')

    def test_tablespace_for_many_to_many_field(self):