Question

在Rails 3中，我已经设置了两个嵌套资源：

config/routes.rb

resources :agencies do
   resources :properties
end

我使用Mongomapper作为我的ORM，当我尝试在现有代理商下创建新属性时，我收到此错误：

---> 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中：

def new
    @property = Property.new

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

在app / views / properties / _form.html.erb中

：

<%= 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app / views / properties / new.html.erb中：

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

我怀疑未定义的properties_path错误与代理商下属性资源的嵌套有关。但是，我无法弄清楚如何处理_form.html.erb第1行中的抱怨，因为像form_for (@agency, @property)这样的东西不起作用。

有什么想法吗？

Answer 1

根据您的路线，财产是否代理机构，对吗？

为避免错误，您可以按照以下方式：

step1-在控制器中，在'new'动作中，将@property对象实例化为：

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

_form.html.erb中的step2-使用此：

form_for (@property.agency,@property)

此代码应该可以肯定（我经常使用它），不知道是否有更清洁/更难看的解决方案;）

Rails 3嵌套资源未定义方法错误

1 个答案: