test_app/app/Models/System.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class System extends Model
{
    //定义表
    protected $table = "system";
    //定义主键
    protected $primaryKey = "id";
    protected $fillable = ['keys','title','values','content','desc'];
    public $timestamps = false;
}