cssd-back/app/Item.php

<?php

    namespace App;

    use Illuminate\Database\Eloquent\Model;

    class Item extends Model
    {
        public $fillable = [ 'name' , 'size' , 'unique_id' , 'specific' , 'note' , 'user_id' , 'udi' , 'status' ];

        public function packages()
        {
            return $this->belongsToMany( 'App\Package' , 'item_package' )->withPivot( 'count' );
        }

        public function user()
        {
            return $this->belongsTo( 'App\User' );
        }

        public function files()
        {
            return $this->morphMany( 'App\Media' , 'model' );
        }
    }