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8ca35d7c6a
Used shorter column names to make the generated index name fit within Oracle's limit of 30 characters
76 lines
3.0 KiB
Python
76 lines
3.0 KiB
Python
from unittest import skipUnless
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from django.db import connection
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from django.test import TestCase
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from .models import Article, ArticleTranslation, IndexTogetherSingleList
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class SchemaIndexesTests(TestCase):
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"""
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Test index handling by the db.backends.schema infrastructure.
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"""
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def test_index_name_hash(self):
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"""
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Index names should be deterministic.
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"""
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with connection.schema_editor() as editor:
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index_name = editor._create_index_name(
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model=Article,
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column_names=("c1", "c2", "c3"),
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suffix="123",
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)
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self.assertEqual(index_name, "indexes_article_c1_7ce4cc86123")
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def test_index_together(self):
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editor = connection.schema_editor()
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index_sql = editor._model_indexes_sql(Article)
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self.assertEqual(len(index_sql), 1)
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# Ensure the index name is properly quoted
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self.assertIn(
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connection.ops.quote_name(
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editor._create_index_name(Article, ['headline', 'pub_date'], suffix='_idx')
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),
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index_sql[0]
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)
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def test_index_together_single_list(self):
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# Test for using index_together with a single list (#22172)
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index_sql = connection.schema_editor()._model_indexes_sql(IndexTogetherSingleList)
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self.assertEqual(len(index_sql), 1)
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@skipUnless(connection.vendor == 'postgresql',
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"This is a postgresql-specific issue")
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def test_postgresql_text_indexes(self):
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"""Test creation of PostgreSQL-specific text indexes (#12234)"""
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from .models import IndexedArticle
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index_sql = connection.schema_editor()._model_indexes_sql(IndexedArticle)
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self.assertEqual(len(index_sql), 5)
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self.assertIn('("headline" varchar_pattern_ops)', index_sql[2])
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self.assertIn('("body" text_pattern_ops)', index_sql[3])
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# unique=True and db_index=True should only create the varchar-specific
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# index (#19441).
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self.assertIn('("slug" varchar_pattern_ops)', index_sql[4])
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@skipUnless(connection.vendor == 'postgresql',
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"This is a postgresql-specific issue")
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def test_postgresql_virtual_relation_indexes(self):
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"""Test indexes are not created for related objects"""
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index_sql = connection.schema_editor()._model_indexes_sql(Article)
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self.assertEqual(len(index_sql), 1)
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@skipUnless(connection.vendor == 'mysql', "This is a mysql-specific issue")
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def test_no_index_for_foreignkey(self):
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"""
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MySQL on InnoDB already creates indexes automatically for foreign keys.
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(#14180).
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"""
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storage = connection.introspection.get_storage_engine(
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connection.cursor(), ArticleTranslation._meta.db_table
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)
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if storage != "InnoDB":
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self.skip("This test only applies to the InnoDB storage engine")
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index_sql = connection.schema_editor()._model_indexes_sql(ArticleTranslation)
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self.assertEqual(index_sql, [])
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