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Refs #27558 -- Added test for no index on InnoDB ForeignKey.

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The refactor in 3f76d1402d fixed the creation
of redundant indexes.

Forwardport of 82ce55dbbe from stable/1.10.x
This commit is contained in:
Ed Morley 2016-12-01 15:54:58 +00:00 • committed by Tim Graham
parent 47744a0a4e
commit dd2e4d7b5d
2 changed files with 17 additions and 0 deletions
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14
tests/indexes/tests.py
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@ -1,6 +1,8 @@
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 .models import Article, ArticleTranslation, IndexTogetherSingleList
@ -98,3 +100,15 @@ class SchemaIndexesTests(TestCase):
'CREATE INDEX `indexes_articletranslation_article_no_constraint_id_d6c0806b` '
'ON `indexes_articletranslation` (`article_no_constraint_id`)'
])
# 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_articletrans_new_foreign_key_id_d27a9146_fk_indexes_a` '
'FOREIGN KEY (`new_foreign_key_id`) REFERENCES `indexes_article` (`id`)'
])