Fixed #26542 -- Fixed quoting in CreateExtension operation.

django/contrib/postgres/operations.py

@@ -14,10 +14,10 @@ class CreateExtension(Operation):
     def database_forwards(self, app_label, schema_editor, from_state, to_state):
         if schema_editor.connection.vendor != 'postgresql':
             return
-        schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % self.name)
+        schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % schema_editor.quote_name(self.name))
 
     def database_backwards(self, app_label, schema_editor, from_state, to_state):
-        schema_editor.execute("DROP EXTENSION %s" % self.name)
+        schema_editor.execute("DROP EXTENSION %s" % schema_editor.quote_name(self.name))
 
     def describe(self):
         return "Creates extension %s" % self.name

tests/postgres_tests/migrations/0001_setup_extensions.py

@@ -5,20 +5,21 @@ from django.db import migrations
 
 try:
     from django.contrib.postgres.operations import (
-        HStoreExtension, UnaccentExtension,
+        CreateExtension, HStoreExtension, UnaccentExtension,
     )
 except ImportError:
     from django.test import mock
+    CreateExtension = mock.Mock()
     HStoreExtension = mock.Mock()
     UnaccentExtension = mock.Mock()
 
 
 class Migration(migrations.Migration):
 
-    dependencies = [
-    ]
-
     operations = [
+        # Ensure CreateExtension quotes extension names by creating one with a
+        # dash in its name.
+        CreateExtension('uuid-ossp'),
         HStoreExtension(),
         UnaccentExtension(),
     ]