如何在需要引用调用模型的相关模型中检索数据

I have a controller and two models, a user and a store. A user has_many stores. Inside stores I have a method get_items which lists items. get_items itself needs a reference to the user. What I have done now is the following

我有一个控制器和两个模型，一个用户和一个商店。用户拥有多个商店。在商店内部，我有一个方法get_items列出项目。 get_items本身需要对用户的引用。我现在所做的是以下内容

@items = user.stores.first.get_items(user)

this looks weird to me since the initial caller has to pass itself as an argument to the get_items method. What would you recommend?

这对我来说很奇怪，因为初始调用者必须将自己作为参数传递给get_items方法。你会推荐什么？

best, phil

最好的，菲尔

1 个解决方案

#1

If you've defined the relation in two directions,

如果您已在两个方向上定义了关系，

class User < ActiveRecord::Base
  has_many :stores
end

class Store < ActiveRecord::Base
  belongs_to :user
end

then you have access to the user that a store belongs to within the Store instance. So you should be able to write

然后您可以访问Store实例中商店所属的用户。所以你应该能够写作

def get_items
   do_something_with user
end

and it should use the correct user. The call to get_items could then be

它应该使用正确的用户。然后可以调用get_items

@items = user.stores.first.get_items

I would personally rename get_items to items.

我个人会将get_items重命名为item。

#1