table_name()} ( `id` int NOT NULL AUTO_INCREMENT, `child_id` int NOT NULL, `child_type` longtext NOT NULL, `parent_id` int NOT NULL, `parent_type` longtext NOT NULL, `created_at` TIMESTAMP, `updated_at` DATETIME, UNIQUE KEY (`id`) ) {$this->charset_collate( true )};"; dbDelta( $query ); } /** * Function to ensure proper collation of the relationships table. * * @since 3.4.0 */ public function cache_collate_objects() { global $wpdb; // Modify our table. $query = "ALTER TABLE {$this->table_name()} MODIFY `child_type` longtext {$this->charset_collate()} NOT NULL, MODIFY `parent_type` longtext {$this->charset_collate()} NOT NULL;"; $wpdb->query( $query ); } }