ROR子 - 子資源形式故障

Question

感謝大家以前的幫助。我會假設這將是一個相當不錯的問題，但是我有一個問題，而且我似乎無法弄清楚。

基本上， 我正在跟蹤幾個醫院的防火牆及其區域/接口。所以我的模型看起來像

Hospital 
    |--> Firewall 
     |--> fwzones 

我已經幾乎得到了一切，除了新的形式。

，這裏是我的routes.rb

mine::Application.routes.draw do 

    resources :hospitals do 
    resources :firewalls do 
     resources :fwzones 
    end 
    end 
end 

hospital.rb

class Hospital < ActiveRecord::Base 
    has_many :firewalls, :dependent => :destroy 
end 

firewall.rb

class Firewall < ActiveRecord::Base 
    belongs_to :hospital 
    has_many :fwzones 
end 

fwzone.rb

class Fwzone < ActiveRecord::Base 
    belongs_to :firewall 
end 

fwzone位指示

class FwzonesController < ApplicationController 
.... 
    def new 
    @hospital = Hospital.find(params[:hospital_id]) 
    @firewall = @hospital.firewalls.find(params[:firewall_id]) 
    @fwzone = @firewall.fwzones.new 

    respond_to do |format| 
     format.html # new.html.erb 
     format.xml { render :xml => @fwzone } 
    end 
    end 
.... 
end 

，我已經試過

<%= form_for([@hospital,@hospital.firewalls.fwzones.build]) do |f| %> 

Error: undefined method `fwzones' for #<Class:0x1bba030> 
------------------- 
<%= form_for([@firewall,@firewalls.fwzones.build]) do |f| %> 
<%= form_for([@hospital,@firewalls.fwzones.build]) do |f| %> 

Error: undefined method `fwzones' for nil:NilClass 
------------------- 
<%= form_for([@hospital.firewalls,@fwzones]) do |f| %> 

Error: undefined method `model_name' for NilClass:Class 

我認爲它有事情做與醫院或防火牆模式，但我真的無法弄清楚形式的字符串。任何幫助表示讚賞。哦，這是我的耙路線，而我們在這裏。

hospital_firewall_fwzones GET /hospitals/:hospital_id/firewalls/:firewall_id/fwzones(.:format)   {:action=>"index", :controller=>"fwzones"} 
    hospital_firewall_fwzones POST /hospitals/:hospital_id/firewalls/:firewall_id/fwzones(.:format)   {:action=>"create", :controller=>"fwzones"} 
new_hospital_firewall_fwzone GET /hospitals/:hospital_id/firewalls/:firewall_id/fwzones/new(.:format)  {:action=>"new", :controller=>"fwzones"} 
edit_hospital_firewall_fwzone GET /hospitals/:hospital_id/firewalls/:firewall_id/fwzones/:id/edit(.:format) {:action=>"edit", :controller=>"fwzones"} 
    hospital_firewall_fwzone GET /hospitals/:hospital_id/firewalls/:firewall_id/fwzones/:id(.:format)  {:action=>"show", :controller=>"fwzones"} 
    hospital_firewall_fwzone PUT /hospitals/:hospital_id/firewalls/:firewall_id/fwzones/:id(.:format)  {:action=>"update", :controller=>"fwzones"} 
    hospital_firewall_fwzone DELETE /hospitals/:hospital_id/firewalls/:firewall_id/fwzones/:id(.:format)  {:action=>"destroy", :controller=>"fwzones"} 
      hospital_firewalls GET /hospitals/:hospital_id/firewalls(.:format)        {:action=>"index", :controller=>"firewalls"} 
      hospital_firewalls POST /hospitals/:hospital_id/firewalls(.:format)        {:action=>"create", :controller=>"firewalls"} 
     new_hospital_firewall GET /hospitals/:hospital_id/firewalls/new(.:format)       {:action=>"new", :controller=>"firewalls"} 
     edit_hospital_firewall GET /hospitals/:hospital_id/firewalls/:id/edit(.:format)      {:action=>"edit", :controller=>"firewalls"} 
      hospital_firewall GET /hospitals/:hospital_id/firewalls/:id(.:format)       {:action=>"show", :controller=>"firewalls"} 
      hospital_firewall PUT /hospitals/:hospital_id/firewalls/:id(.:format)       {:action=>"update", :controller=>"firewalls"} 
      hospital_firewall DELETE /hospitals/:hospital_id/firewalls/:id(.:format)       {:action=>"destroy", :controller=>"firewalls"} 
        hospitals GET /hospitals(.:format)              {:action=>"index", :controller=>"hospitals"} 
        hospitals POST /hospitals(.:format)              {:action=>"create", :controller=>"hospitals"} 
       new_hospital GET /hospitals/new(.:format)             {:action=>"new", :controller=>"hospitals"} 
       edit_hospital GET /hospitals/:id/edit(.:format)            {:action=>"edit", :controller=>"hospitals"} 
        hospital GET /hospitals/:id(.:format)             {:action=>"show", :controller=>"hospitals"} 
        hospital PUT /hospitals/:id(.:format)             {:action=>"update", :controller=>"hospitals"} 
        hospital DELETE /hospitals/:id(.:format)             {:action=>"destroy", :controller=>"hospitals"} 

Answer 1

在這裏，我們在許多防火牆

<%= form_for([@hospital,@hospital.firewalls.fwzones.build]) do |f| %> 

調用fwzones並應

<%= form_for([@hospital, @firewall, @firewall.fwzones.build]) do |f| %> 

其他是複數和不存在的變量只是隨機猜測。

你似乎在猜測你的方式，我建議你買一本書，並學習你的方式。長遠來看，您將節省大量時間。

http://pragprog.com/titles/rails4/agile-web-development-with-rails