baoshi-was/app/Storage.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

use App\Traits\ModelLogChanging;

class Storage extends Model
{
    use ModelLogChanging;

    protected $fillable = [
        "material_box_id",
        "commodity_id",
        "amount"
    ];

    public function materialBox()
    {   //料箱
        $this->belongsTo(MaterialBox::class);
    }
    public function commodity()
    {   //商品
        $this->belongsTo(Commodity::class);
    }
}