Ruby-on-rails Rails - 附加属性并添加到数组

Question

提问by baihu

I am having a slight problem with appending data and then adding it into the array.

我在附加数据然后将其添加到数组中时遇到了一个小问题。

Here is my code

这是我的代码

@order.orderdesc ||= []

@cart.line_items.each do |item|
 @order.orderdesc += item.quantity +  "x" + item.product.title
end

I only want to add item.quantity and item.product.title. They can be accessed.

我只想添加 item.quantity 和 item.product.title。可以访问它们。

Thanks

谢谢

Answer 1

If you want to add "stuff" in an array, the +=is not made for that. You can use the <<operator (append at the end of the array):

如果您想在数组中添加“东西”，+=则不是为此而制作的。您可以使用<<运算符（在数组末尾追加）：

@order.orderdesc ||= []

@cart.line_items.each do |item|
 @order.orderdesc << item.quantity +  "x" + item.product.title
end

Or you can use .push():

或者你可以使用.push()：

@order.orderdesc ||= []

@cart.line_items.each do |item|
 @order.orderdesc.push( item.quantity +  "x" + item.product.title )
end