'array', 'tags' => 'array', ]; protected $appends = [ 'tags' ]; public function goods() { return $this->belongsTo(Goods::class, 'goods_id', 'id'); } public function goodsActivity() { return $this->belongsTo(GoodsActivity::class, 'goods_id', 'id'); } public function getTagsAttribute() { return Goods::query()->where(['id' => $this->attributes['goods_id']])->value('tags'); } }