belongsTo(BusinessOrder::class, 'business_order_id', 'id'); } public function shop() { return $this->belongsTo(Shop::class, 'shop_id', 'id'); } public function goodsSkuLocation() { return $this->hasOne(GoodsSkuLocation::class, 'external_sku_id', 'external_sku_id'); } public function goodsSku() { return $this->hasOne(GoodsSku::class, 'external_sku_id', 'external_sku_id'); } }