operations.py 文件源码

def value_to_db_datetime( self, value ):
        if value is None:
            return None

        if( djangoVersion[0:2] <= ( 1, 3 ) ):
            #DB2 doesn't support time zone aware datetime
            if ( value.tzinfo is not None ):
                raise ValueError( "Timezone aware datetime not supported" )
            else:
                return value
        else:
            if is_aware(value):
                if settings.USE_TZ:
                    value = value.astimezone( utc ).replace( tzinfo=None )
                else:
                    raise ValueError( "Timezone aware datetime not supported" )
            return unicode( value )