Rails 3个中嵌套资源未定义的方法错误

Question

在Rails 3缘，我已经建立了两个嵌套的资源是这样的：

config/routes.rb 

resources :agencies do 
    resources :properties 
end 

我用Mongomapper作为我的ORM，当我尝试创建下一个新的属性现有的代理，我得到这个错误：

---> http://localhost:3000/agencies/4c3ff0f455899f0fb5000001/properties/new 

NoMethodError in Properties#new 

Showing /Users/peter/programming-MacBookPro/iPhone/inspector-on-rails/app/views/properties/_form.html.erb where line #1 raised: 

undefined method `properties_path' for #<#<Class:0x00000100dae020>:0x00000100d97f00> 
Extracted source (around line #1): 

1: <%= form_for @property do |f| %> 
2: <% if @property.errors.any? %> 
3: <div id="error_explanation"> 
4:  <h2><%= pluralize(@property.errors.count, "error") %> prohibited this property from being saved:</h2> 
Trace of template inclusion: app/views/properties/new.html.erb 

Rails.root: /Users/peter/programming-MacBookPro/p-on-rails 

Application Trace | Framework Trace | Full Trace 
app/views/properties/_form.html.erb:1 
app/views/properties/new.html.erb:3 
app/controllers/properties_controller.rb:29:in `new' 
Request 

Parameters: 

{"agency_id"=>"4c3ff0f455899f0fb5000001"} 

在properties_controller.rb：

def new 
    @property = Property.new 

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

在app

/图S /属性/ _form.html.erb：

<%= form_for @property do |f| %> 
<% if @property.errors.any? %> 
    <div id="error_explanation"> 
    <h2><%= pluralize(@property.errors.count, "error") %> prohibited this property from being saved:</h2> 

    <ul> 
    <% @property.errors.full_messages.each do |msg| %> 
     <li><%= msg %></li> 
    <% end %> 
    </ul> 
    </div> 
<% end %> 
<div class="field"> 
    <%= f.label :address_postcode %><br /> 
    <%= f.text_field :address_postcode %> 
    </div> 
    <div class="actions"> 
    <%= f.submit %> 
    </div> 
<% end %> 

在应用程序/视图/属性/ new.html.erb：

<h1>New property</h1> 
<%= render 'form' %> 
<%= link_to 'Back', @property %> 

我怀疑有关properties_path没有被定义的错误有某事在机构下嵌套房地产资源。但是，我无法弄清楚如何处理_form.html.erb的第1行中的投诉，因为form_for (@agency, @property)之类的内容不起作用。

任何想法？

Answer 1

根据您的路线，财产是嵌套在代理机构，对不对？

，以避免错误，你可以按照这种方式：在控制器

step1-，在 '新' 行动，实例@property对象为：在_form.html.erb

@property = Property.new(:agency_id => params[:agency_id]) # this will have agency association from beginning 

step2-使用此：

form_for (@property.agency,@property) 

这个代码应该是肯定的工作（我用它经常），不知道是否有一个更清洁/丑少的解决方案;）