嵌套協會（當然的ActiveResource）

Question

我有下面許多人在許多Rails的關係刪除網址：

class User < ... 
    has_many :channel_assignments 
    has_many :channels, :through => :channel_assignments 
end 


class Channel < ... 
    has_many :channel_assignments 
    has_many :users :through => :channel_assignments 
end 

class ChannelAssignment < ... 
    belongs_to :user 
    belongs_to :channel 
end 

定義的路由：

map.resources :users, :has_many => :channel_assignments 

更新：耙路線給出以下輸出：

 user_channel_assignments GET /users/:user_id/channel_assignments(.:format)         {:action=>"index", :controller=>"channel_assignments"} 
           POST /users/:user_id/channel_assignments(.:format)         {:action=>"create", :controller=>"channel_assignments"} 
    new_user_channel_assignment GET /users/:user_id/channel_assignments/new(.:format)        {:action=>"new", :controller=>"channel_assignments"} 
    edit_user_channel_assignment GET /users/:user_id/channel_assignments/:id/edit(.:format)      {:action=>"edit", :controller=>"channel_assignments"} 
     user_channel_assignment GET /users/:user_id/channel_assignments/:id(.:format)        {:action=>"show", :controller=>"channel_assignments"} 
           PUT /users/:user_id/channel_assignments/:id(.:format)        {:action=>"update", :controller=>"channel_assignments"} 
           DELETE /users/:user_id/channel_assignments/:id(.:format)        {:action=>"destroy", :controller=>"channel_assignments"} 

由於ChannelAssignemnts綁定對於用戶，我使用腳手架ChannelAssignmentsController在創建ChannelAssignment時自動將用戶分配到頻道。

我這樣做，通過使用這些URL：

#/app/views/users/index.html.erb 
#show a link to view all channels of a user 
<%= link_to 'Channels', user_channel_assignments_path(user) %> 
... 

#/app/views/channel_assignments/new.html.erb 
#assign a channel to currently selected user 
<% form_for(@channel_assignment, :url => user_channel_assignments_path(@user)) do |f| %> 
... 

那迷人的作品。

但是：哪個是取消分配頻道的路徑，ergo：刪除用戶的ChannelAssignment？運行耙路線時找不到它。

必須像

<%= link_to 'Destroy', delete_user_channel_assignment, :user_id => @user, :method => :delete %> 

任何輸入這個？我確定有一種方法可以自動生成此URL。

感謝

馬特

Answer 1

你只需要使用delete動詞在你的鏈接：

<%= link_to 'Destroy', user_channel_assignment(:user_id => @user, :id => @channel), :method => :delete %> 

這也應該是在耙路線可見 - 只是刪除動詞。