ruby-on-rails – Rails Routing – ：action =>’new’返回

模型文件在类声明之外没有代码.我添加了index,new,show和_form .html.erb的视图页面.

config / routes.rb包含行资源：external_databases.该模型目前不包含嵌套资源.此应用程序中还声明了其他模型,但目前它们都没有与此模型交互,并且在声明资源之前它们都经过测试并且功能和关闭：external_databases.

我有一个从索引视图到new_external_database_path的链接,其行为与{：action =>完全相同“new”,：controller => “external_database”}如果我正确关注.

这理论上应该加载application / external_databases / new,它将呈现_form.html.erb. _form的第一行是<％= form_for(@ external_database)do | f | ％GT; 使用/ new链接时会出现帖子标题中所述的问题. url application / external_databases / new出现以下错误： 没有路线匹配{：action =>“show”,：controller =>“external_databases”}

当我使用rails控制台创建数据成员时,它通过索引和显示正确显示. edit方法使用相同的_form文件,并成功编辑控制台创建的数据成员.毁灭也功能.

……那么为什么不认识新方法呢？

我的这个模型的控制器代码：

class ExternalDatabasesController < ApplicationController

     def index 
      @external_databases = ExternalDatabase.all

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

     # POST /external_databases
     # POST /external_databases.json

     def new 
      @external_database = ExternalDatabase.new

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

     def show
      @external_database = ExternalDatabase.find(params[:id])

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

     def create
      @external_database = ExternalDatabase.new(params[:external_database])

      respond_to do |format|
       if @external_database.save
        format.html {redirect_to @external_database,:notice => "New External Database         Profile was created successfully!"}
        format.json {render :json => @external_database,:status => :created,:location => @external_database}
       else
        format.html {render :action => "new"}
        format.json { render :json => @external_database.errors,:status =>         :unprocessable_entity }
       end
      end
     end


     #GET /external_databases/1/edit
     def edit
      @external_database = ExternalDatabase.find(params[:id])
     end

     # PUT /external_databases/1
     # PUT /external_databases/1.json
     def update 
      @external_database = ExternalDatabase.find(params[:id])

      respond_to do |format|
       if @external_database.update_attributes(params[:external_database])
        format.html {redirect_to @external_database,:notice => "External Database         Profile was updated successfully!" }
        format.json {head :ok}
       else 
        format.html { redner :action => "edit" }
        format.json {render :json => @external_database.errors,:status =>         :unprocessable_entity }
       end
      end
     end


     # DELETE /external_databases/1
     # DELETE /external_databases/1.json
     def destroy
      @external_database = ExternalDatabase.find(params[:id])
      @external_database.destroy

      respond_to do |format| 
       format.html { redirect_to external_databases_rul }
       format.json { head :ok }
      end
     end

    end

更新：添加routes.rb和Views代码

我的routes.rb文件：

App::Application.routes.draw do

      resources :type_as do 
         resources :type_bs
         end

      resources :type_bs do 
        resources :type_as
        resources :type_cs
        end

      resources :type_cs do
       resources :type_bs
       end

      resources :external_databases

      root :to => "home#index"

    end

浏览次数：

external_databases_form

<%= form_for(@external_database) do |f| %>

     <div class="field">
      <%= f.label :name %><br/>
      <%= f.text_field :name %><br/>
     </div>
     <div class="field">
      <%= f.label :description %><br/>
      <%= f.text_field :description %><br/>
     </div>
     <div class="field">
      <%= f.label :url %><br/>
      <%= f.text_field :url %><br/>
     </div>
     <div class="actions">
       <%= f.submit %>
     </div>
    <% end %>

index.html.erb

<p id="notice"><%= notice %></p>
    <h1>External Databases</h1>

    <table border="1">
     <tr>
      <th>Database Name</th>
     </tr>
     <% @external_databases.each do |exdb| %>
      <tr>
       <td><%= exdb.name %></td>
       <td><%= truncate(exdb.description) %></td>
       <td><%= link_to 'Show',exdb %></td>
       <!-- link_to.... :target => "_blank" will open the url in a new window -->
       <td><%= link_to 'Visit',exdb.url,:target => "_blank" %></td>  
       <td><%= link_to 'Edit',edit_external_database_path(exdb)%></td>
       <td><%= link_to 'Destroy',exdb,:confirm => 'Are you sure?',:method => :delete %></td>
      </tr>
     <% end %>
    </table>

    <br/>
    <%= link_to 'New External Database Profile',{ :action => "new",:controller => "external_databases" }%> | 
    <%= link_to 'Home',root_path %>

new.html.erb

<h1>Creating a new External Database Profile</h1>

    <%= render 'form' %>

    <%= link_to 'Back',external_database_path %>

show.html.erb

<p id="notice"><%= notice %></p>

    <table cellspacing="3" cellpadding="5" border="1">
     <tr> 
      <th><b>External Database Name</b></th>
      <th><b>Database ID</b></th>
     </tr>
     <tr>
      <td><%= @external_database.name %></td>
      <td><%= @external_database.id %></td>
     </tr>
     <tr colspan="2">
      <th><b>URL</b></th>
     </tr>
     <tr colspan="2">
      <td><%= @external_database.url %></td>
      <td><%= link_to 'Visit External Database',@external_database.url %></td>
     </tr>
    </table>



    <p>
     <h3>Description</h3>
     <!% @external_database.description.split.scan(/.{,60}/).each do |line| %>
      <!%= line %><br/>
     <!% end %>
    </p>

    <br /><br /><br />
    <%= link_to 'Back to External Database Index',external_databases_path %> |
    <%= link_to 'Edit',edit_external_database_path(@external_database) %> | 
    <%= link_to 'Destroy',:method => :delete %>