如何在 Rails 3 中向控制器添加自定义操作 [英] How to add a custom action to the controller in Rails 3

问题描述

我想向控制器添加另一个操作，但不知道如何操作.

I want to add another action to my controller, and I can't figure out how.

我在 RailsCasts 和大多数 StackOverflow 主题上找到了这个:

I found this on RailsCasts, and on most StackOverflow topics:

# routes.rb
resources :items, :collection => {:schedule => :post, :save_scheduling => :put}

# items_controller.rb
  ...
  def schedule
  end

  def save_scheduling
  end

# items index view:
<%= link_to 'Schedule', schedule_item_path(item) %>

但它给了我错误:

undefined method `schedule_item_path' for #<#<Class:0x6287b50>:0x62730c0>

不知道我应该从哪里开始.

Not sure where I should go from here.

推荐答案

更好的写作方式

resources :items, :collection => {:schedule => :post, :save_scheduling => :put}

是

resources :items do
  collection do
    post :schedule
    put :save_scheduling
  end
end

这将创建像

• /items/schedule
• /items/save_scheduling

因为您将 item 传递到您的 schedule_... 路由方法中，所以您可能需要 member 路由而不是 集合路由.

Because you're passing an item into your schedule_... route method, you likely want member routes instead of collection routes.

resources :items do
  member do
    post :schedule
    put :save_scheduling
  end
end

这将创建像

• /items/:id/schedule
• /items/:id/save_scheduling

现在可以使用接受 Item 实例的路由方法 schedule_item_path.最后一个问题是，您的 link_to 将生成一个 GET 请求，而不是您的路由要求的 POST 请求.您需要将其指定为 :method 选项.

Now a route method schedule_item_path accepting an Item instance will be available. The final issue is, your link_to as it stands is going to generate a GET request, not a POST request as your route requires. You need to specify this as a :method option.

link_to("Title here", schedule_item_path(item), method: :post, ...)

推荐阅读:http://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-link_to

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