<?php namespace app\model; use DateTimeInterface; use support\Model; class CollegeTeacher extends Model { public $table = 'college_teacher'; public $primaryKey = 'teacher_id'; public $dateFormat = 'U'; public const CREATED_AT = 'teacher_addTime'; public const UPDATED_AT = 'teacher_updateTime'; public function serializeDate(DateTimeInterface $date) { return $date->format('Y-m-d H:i:s'); } }