$timestamps
$timestamps :
<?php
/**
* Created by PhpStorm.
* User: yan
* Date: 2018/8/17 0017
* Time: 22:04
*/
namespace App\Model;
use Illuminate\Database\Eloquent\Model;
class Tag extends Model
{
//关闭时间戳
public $timestamps = false;
//关联问题表，可以通过标签获取问题的Collection
public function problem()
{
return $this->belongsToMany(Problem::class);
}
}