/**
* 添加一个商品到订单商品明细表中
* @param $goods 商品ActiveRecord 或 商品id
* @param $number 商品数量
* @param $orderid 订单id
* @return OrderItem|bool
*/
public function addOne($goods = 0, $number = 1, $orderid = null)
{
$orderItem = new OrderItem();
if (is_integer($goods)) {
$goods = Goods::findOne(['goods_id' => $goods]);
}
$orderItem->item_name = $goods['goods_name'];
$orderItem->item_price = $goods['goods_price'];
$orderItem->item_unit = $goods['goods_unit'];
$orderItem->goods_id = $goods['goods_id'];
$orderItem->item_number = $number;
$orderItem->subtotal = $goods['goods_price'] * $number;
$orderItem->order_id = $orderid;
return $orderItem->save() ? $orderItem : false;
}