<?php namespace app\model; use DateTimeInterface; use support\Model; class SysMessage extends Model { protected $table = 'sys_message'; protected $primaryKey = 'message_id'; protected $dateFormat = 'U'; const CREATED_AT = 'message_addtimes'; const UPDATED_AT = null; protected function serializeDate(DateTimeInterface $date) { return $date->format('Y-m-d H:i:s'); } }