Ticket #12850: add_quote_name_to_constraint_identifier_1.1.1.patch

django/db/backends/creation.py

@@ -300 +300 @@
                 (style.SQL_KEYWORD('ALTER TABLE'),
                 style.SQL_TABLE(qn(table)),
                 style.SQL_KEYWORD(self.connection.ops.drop_foreignkey_sql()),
-                style.SQL_FIELD(truncate_name(r_name, self.connection.ops.max_name_length()))))
+                style.SQL_FIELD(self.connection.ops.quote_name(truncate_name(r_name, self.connection.ops.max_name_length())))))
         del references_to_delete[model]
         return output