Refs -- Prevented timezone assignment for unusable PostgreSQL connections.
@@ -195,7 +195,8 @@ class DatabaseWrapper(BaseDatabaseWrapper):
return connection
def ensure_timezone(self):
- self.ensure_connection()
+ if not self.is_usable():
+ return False
conn_timezone_name = self.connection.get_parameter_status('TimeZone')
timezone_name = self.timezone_name
if timezone_name and conn_timezone_name != timezone_name:
@@ -207,6 +208,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
def init_connection_state(self):
self.connection.set_client_encoding('UTF8')
+ self.ensure_connection()
timezone_changed = self.ensure_timezone()
if timezone_changed:
# Commit after setting the time zone (see #17062)
@@ -246,6 +248,8 @@ class DatabaseWrapper(BaseDatabaseWrapper):
self.cursor().execute('SET CONSTRAINTS ALL DEFERRED')
def is_usable(self):
+ if self.connection is None:
+ return False
try:
# Use a psycopg cursor directly, bypassing Django's utilities.
self.connection.cursor().execute("SELECT 1")
