test_app/app/Models/Inventory.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Inventory extends Model
{
    //定义表
    protected $table = "goods_sku_agent_total";
    //定义主键
    protected $primaryKey = "id";
    protected $fillable = ['user_id','goods_id','sku_id','total'];
    public $timestamps = false;
    public function user()
    {
        return $this->hasOne('App\Models\User','id','user_id');
    }
    public function goods()
    {
        return $this->hasOne('App\Models\Goods','id','goods_id')->withTrashed();
    }
}