mirror of https://github.com/django/django.git
126 lines
5.3 KiB
Python
126 lines
5.3 KiB
Python
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, TransactionTestCase
|
|
|
|
from .models import Article, ArticleTranslation, IndexTogetherSingleList
|
|
|
|
|
|
class SchemaIndexesTests(TestCase):
|
|
"""
|
|
Test index handling by the db.backends.schema infrastructure.
|
|
"""
|
|
|
|
def test_index_name_hash(self):
|
|
"""
|
|
Index names should be deterministic.
|
|
"""
|
|
with connection.schema_editor() as editor:
|
|
index_name = editor._create_index_name(
|
|
table_name=Article._meta.db_table,
|
|
column_names=("c1",),
|
|
suffix="123",
|
|
)
|
|
self.assertEqual(index_name, "indexes_article_c1_a52bd80b123")
|
|
|
|
def test_index_name(self):
|
|
"""
|
|
Index names on the built-in database backends::
|
|
* Are truncated as needed.
|
|
* Include all the column names.
|
|
* Include a deterministic hash.
|
|
"""
|
|
long_name = 'l%sng' % ('o' * 100)
|
|
with connection.schema_editor() as editor:
|
|
index_name = editor._create_index_name(
|
|
table_name=Article._meta.db_table,
|
|
column_names=('c1', 'c2', long_name),
|
|
suffix='ix',
|
|
)
|
|
expected = {
|
|
'mysql': 'indexes_article_c1_c2_looooooooooooooooooo_255179b2ix',
|
|
'oracle': 'indexes_a_c1_c2_loo_255179b2ix',
|
|
'postgresql': 'indexes_article_c1_c2_loooooooooooooooooo_255179b2ix',
|
|
'sqlite': 'indexes_article_c1_c2_l%sng_255179b2ix' % ('o' * 100),
|
|
}
|
|
if connection.vendor not in expected:
|
|
self.skipTest('This test is only supported on the built-in database backends.')
|
|
self.assertEqual(index_name, expected[connection.vendor])
|
|
|
|
def test_index_together(self):
|
|
editor = connection.schema_editor()
|
|
index_sql = editor._model_indexes_sql(Article)
|
|
self.assertEqual(len(index_sql), 1)
|
|
# Ensure the index name is properly quoted
|
|
self.assertIn(
|
|
connection.ops.quote_name(
|
|
editor._create_index_name(Article._meta.db_table, ['headline', 'pub_date'], suffix='_idx')
|
|
),
|
|
index_sql[0]
|
|
)
|
|
|
|
def test_index_together_single_list(self):
|
|
# Test for using index_together with a single list (#22172)
|
|
index_sql = connection.schema_editor()._model_indexes_sql(IndexTogetherSingleList)
|
|
self.assertEqual(len(index_sql), 1)
|
|
|
|
@skipUnless(connection.vendor == 'postgresql', "This is a postgresql-specific issue")
|
|
def test_postgresql_text_indexes(self):
|
|
"""Test creation of PostgreSQL-specific text indexes (#12234)"""
|
|
from .models import IndexedArticle
|
|
index_sql = connection.schema_editor()._model_indexes_sql(IndexedArticle)
|
|
self.assertEqual(len(index_sql), 5)
|
|
self.assertIn('("headline" varchar_pattern_ops)', index_sql[1])
|
|
self.assertIn('("body" text_pattern_ops)', index_sql[3])
|
|
# unique=True and db_index=True should only create the varchar-specific
|
|
# index (#19441).
|
|
self.assertIn('("slug" varchar_pattern_ops)', index_sql[4])
|
|
|
|
@skipUnless(connection.vendor == 'postgresql', "This is a postgresql-specific issue")
|
|
def test_postgresql_virtual_relation_indexes(self):
|
|
"""Test indexes are not created for related objects"""
|
|
index_sql = connection.schema_editor()._model_indexes_sql(Article)
|
|
self.assertEqual(len(index_sql), 1)
|
|
|
|
|
|
@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.
|
|
(#14180). An index should be created if db_constraint=False (#26171).
|
|
"""
|
|
storage = connection.introspection.get_storage_engine(
|
|
connection.cursor(), ArticleTranslation._meta.db_table
|
|
)
|
|
if storage != "InnoDB":
|
|
self.skip("This test only applies to the InnoDB storage engine")
|
|
index_sql = connection.schema_editor()._model_indexes_sql(ArticleTranslation)
|
|
self.assertEqual(index_sql, [
|
|
'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.
|
|
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)
|
|
field_created = True
|
|
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`)'
|
|
])
|
|
finally:
|
|
if field_created:
|
|
with connection.schema_editor() as editor:
|
|
editor.remove_field(ArticleTranslation, new_field)
|