Fixed #24390 -- Made migration index names deterministic. (f37c11ee) · Commits · Dom Sekotill / django

django/db/backends/base/schema.py

+1 −1

Original line number	Diff line number	Diff line
		@@ -798,7 +798,7 @@ class BaseDatabaseSchemaEditor(object):
		)
		# Else generate the name for the index using a different algorithm
		table_name = model._meta.db_table.replace('"', '').replace('.', '_')
		index_unique_name = '_%x' % abs(hash((table_name, ','.join(column_names))))
		index_unique_name = '_%s' % self._digest(*column_names)
		max_length = self.connection.ops.max_name_length() or 200
		# If the index name is too long, truncate it
		index_name = ('%s_%s%s%s' % (

+13 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,19 @@ 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(
		model=Article,
		column_names=("column1", "column2", "column3"),
		suffix="123",
		)
		self.assertEqual(index_name, "indexes_article_column1_856fe518123")

		def test_index_together(self):
		editor = connection.schema_editor()
		index_sql = editor._model_indexes_sql(Article)