Rails 3 form_for 自定義操作的嵌套路由

Question

我的設置：Rails 3.0.9、Ruby 1.9.2

我向嵌套資源任務添加了自定義操作。

routes.rb
resources :tasks
resources :projects do
  resources :tasks, :constraints => { :protocol => "http" } do 
    put :cancel, :on => :member
  end 
end

rake routes展示

cancel_project_task PUT /projects/:task_id/tasks/:id/cancel(.:format) {:protocol=>"http", :action=>"cancel", :controller=>"tasks"}

在我的 controller 中，

tasks_controller.rb  
  def cancel
    @task = Task.find(params[:id])

    respond_to do |format|
      if @task.cancel
        format.html { redirect_to(@task, :notice => 'Task was successfully canceled.') }
      else
        format.html { render :action => "edit" }
      end
    end
  end

我需要定義一個表單來執行操作，這就是我目前擁有的

_form.html.erb for subscription
  <%= form_for [@project, @task], :url => { :action => 'cancel' } do |f| %>
    <%= f.submit "Cancel your task"%> 
  <% end %>

它拋出一個錯誤

No route matches {:action=>"cancel", :controller=>"tasks"}

我還嘗試添加:method => "put"並出現相同的錯誤

_form.html.erb for subscription
  <%= form_for [@project, @task], :url => { :action => 'cancel', :method => "put" } do |f| %>
    <%= f.submit "Cancel your task"%> 
  <% end %>

任何人都知道正確的 form_format 語法來完成這個？

Answer 1

如果有人想要答案，這就是我必須做的

<%= form_for [@project, @task], :url => cancel_project_task_path(@project, @task) do |f| %>

我花了很長時間才弄清楚這一點，希望這可以幫助下一個毫無戒心的開發人員。