baoshi-was/app/CommodityMaterialBoxModel.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

use App\Traits\ModelLogChanging;

class CommodityMaterialBoxModel extends Model
{
    use ModelLogChanging;

    protected $table = "commodity_material_box_model";
    public $timestamps = false;

    protected $fillable=[
        "commodity_id","material_box_model_id","maximum"
    ];

    public function materialBoxModel()
    {
        return $this->belongsTo(MaterialBoxModel::class,"material_box_model_id","id");
    }
}