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from unittest import skipUnless
from django.core.management.color import no_style
from django.db import connection
from django.test import TestCase, ignore_warnings
from django.utils.deprecation import RemovedInDjango110Warning
from .models import Article, ArticleTranslation, IndexTogetherSingleList
@ignore_warnings(category=RemovedInDjango110Warning)
class CreationIndexesTests(TestCase):
"""
Test index handling by the to-be-deprecated connection.creation interface.
"""
def test_index_together(self):
index_sql = connection.creation.sql_indexes_for_model(Article, no_style())
self.assertEqual(len(index_sql), 1)
def test_index_together_single_list(self):
# Test for using index_together with a single list (#22172)
index_sql = connection.creation.sql_indexes_for_model(IndexTogetherSingleList, no_style())
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.creation.sql_indexes_for_model(IndexedArticle, no_style())
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.creation.sql_indexes_for_model(Article, no_style())
self.assertEqual(len(index_sql), 1)
class SchemaIndexesTests(TestCase):
"""
Test index handling by the db.backends.schema infrastructure.
"""
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, ['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[2])
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', "This is a mysql-specific issue")
def test_no_index_for_foreignkey(self):
"""
MySQL on InnoDB already creates indexes automatically for foreign keys.
(#14180).
"""
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, [])
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