From: Simon Charette Date: Thu, 6 Dec 2018 11:37:43 -0500 Subject: Fixed #29182 -- Adjusted SQLite schema table alteration to support 3.26. SQLite 3.26 repoints foreign key constraints on table renames even when foreign_keys pragma is off which breaks every operation that requires a table rebuild to simulate unsupported ALTER TABLE statements. Fortunately the newly introduced legacy_alter_table pragma allows one to disable this behavior and restore the previous schema editor assumptions. Thanks Florian Apolloner, Christoph Trassl, Chris Lamb for the report and troubleshooting assistance. --- django/db/backends/sqlite3/schema.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/django/db/backends/sqlite3/schema.py b/django/db/backends/sqlite3/schema.py index 36adb22..1cfec35 100644 --- a/django/db/backends/sqlite3/schema.py +++ b/django/db/backends/sqlite3/schema.py @@ -24,6 +24,7 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor): c.execute('PRAGMA foreign_keys') self._initial_pragma_fk = c.fetchone()[0] c.execute('PRAGMA foreign_keys = 0') + c.execute('PRAGMA legacy_alter_table = ON') return super(DatabaseSchemaEditor, self).__enter__() def __exit__(self, exc_type, exc_value, traceback): @@ -31,6 +32,7 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor): with self.connection.cursor() as c: # Restore initial FK setting - PRAGMA values can't be parametrized c.execute('PRAGMA foreign_keys = %s' % int(self._initial_pragma_fk)) + c.execute('PRAGMA legacy_alter_table = OFF') def quote_value(self, value): # The backend "mostly works" without this function and there are use