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[1.10.x] Refs #27558 -- Isolated indexes test on MySQL. 

MySQL schema changes must be done in TransactionTestCase.

Backport of f94475e526 from master
This commit is contained in:
Tim Graham 2016-12-15 13:31:08 -05:00
parent 34c1030eb9
commit 4086ff9ecb
1 changed files with 21 additions and 11 deletions
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32
tests/indexes/tests.py
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@ -3,7 +3,7 @@ from unittest import skipUnless
from django.db import connection
from django.db.models.deletion import CASCADE
from django.db.models.fields.related import ForeignKey
from django.test import TestCase
from django.test import TestCase, TransactionTestCase
from .models import Article, ArticleTranslation, IndexTogetherSingleList
@ -60,7 +60,11 @@ class SchemaIndexesTests(TestCase):
index_sql = connection.schema_editor()._model_indexes_sql(Article)
self.assertEqual(len(index_sql), 1)
@skipUnless(connection.vendor == 'mysql', "This is a mysql-specific issue")
@skipUnless(connection.vendor == 'mysql', 'MySQL tests')
class SchemaIndexesMySQLTests(TransactionTestCase):
available_apps = ['indexes']
def test_no_index_for_foreignkey(self):
"""
MySQL on InnoDB already creates indexes automatically for foreign keys.
@ -79,12 +83,18 @@ class SchemaIndexesTests(TestCase):
# The index also shouldn't be created if the ForeignKey is added after
# the model was created.
with connection.schema_editor() as editor:
new_field = ForeignKey(Article, CASCADE)
new_field.set_attributes_from_name('new_foreign_key')
editor.add_field(ArticleTranslation, new_field)
self.assertEqual(editor.deferred_sql, [
'ALTER TABLE `indexes_articletranslation` '
'ADD CONSTRAINT `indexes_articl_new_foreign_key_id_d27a9146_fk_indexes_article_id` '
'FOREIGN KEY (`new_foreign_key_id`) REFERENCES `indexes_article` (`id`)'
])
field_created = False
try:
with connection.schema_editor() as editor:
new_field = ForeignKey(Article, CASCADE)
new_field.set_attributes_from_name('new_foreign_key')
editor.add_field(ArticleTranslation, new_field)
self.assertEqual(editor.deferred_sql, [
'ALTER TABLE `indexes_articletranslation` '
'ADD CONSTRAINT `indexes_articl_new_foreign_key_id_d27a9146_fk_indexes_article_id` '
'FOREIGN KEY (`new_foreign_key_id`) REFERENCES `indexes_article` (`id`)'
])
finally:
if field_created:
with connection.schema_editor() as editor:
editor.remove_field(ArticleTranslation, new_field)