Rails：无法找到ID为的控制器 [英] Rails: Couldn`t find #controller with ID of

问题描述

当提交答案时，我收到此错误：

  ActiveRecord :: RecordNotFound ）：
 app / controllers / questions_controller.rb：6：in`show'
  

我理解我或者通过传递一个参数从窗体或
didn`t在我的控制器中正确定义错误。

感谢一些帮助找到

  class QuestionsController < ApplicationController 
 def index 
 end 
 
 def show 
 @question = Question.find（params [：id]）
 @choices = @ question.choices 
 end 
 
 def answer 
 @choice = Choice.find（：first，：conditions => {：id => params [：id]}）
 @answer = Answer.create（：question_id => @ choice.question_id，：choice_id => @ choice.id）
 
如果Question.last == @ choice.question 
 render：action => thank_you
 else 
 question = Question.find（：first，：conditions => {：position =>（@ choice.question.position + 1）}）
 redirect_to question_path （：id => question.id）
 end 
 end 
 end 
  

$ b b

views / questions / show.html.erb：

 < div data-role =content> 
< div align =center> 
< h3><％= @ question.question％>< / h3> 
< / div> 
< br>< br> 
< ul data-role =listview> 
<％@ choices.each_with_index do | c，i | ％> 
<％i = i + 1％> 
< li data-theme =c> 
<％= link_to＃{i}。＃{c.choice}，answer_questions_path（：id => c.id）％> 
< / li> 
<％end％> 
< / ul> 
< / div> 
  

:: EDIT ::

发生当我尝试选择一个选择&

 在Thu 12月01日开始为127.0.0.1 GET/ questions / 1 ：38：36 -0500 2011 
由QuestionsController处理＃show as 
参数：{id=>1} 
 SQL（0.6ms）SELECT name 
 FROM sqlite_master 
 WHERE type ='table'AND NOT name ='sqlite_sequence'
问题载入（0.3ms）SELECTquestions。* FROMquestionsWHEREquestions。id= 1 LIMIT 1 
选择加载（10.8ms）SELECTchoices。* FROMchoicesWHERE（choices.question_id = 1）
在布局/应用程序
完成200 OK在424ms（视图：118.0ms | ActiveRecord：11.6ms）
 
 
在Thu的127.0.0.1开始GET/ questions / answer？id = 1 Dec 01 01:38:38 -0500 2011 
处理QuestionController＃show as 
参数：{id=>answer} 
问题负载。* FROMquestionsWHEREquestions。id= 0 LIMIT 1 
在10ms内完成
 
 ActiveRecord :: RecordNotFound（无法找到ID = answer的问题）： 
 app / controllers / questions_controller.rb：6：in`show'
  

。

解决方案

我最好的猜测是，你没有正确设置路线。假设您使用的是Rails 3，而您正在使用资源，则需要添加以下内容：

  resources：questions do 
 member do 
 put'answer'
 end 
 end 
  

$ b b

这将创建一个路径，例如 / questions /＃{id} / answer 。

答案不是HTTP动词，因此在路线中使用资源不会创建到 answer 动作。

根据评论进行编辑：

，如果您要更新或创建数据，则应使用 put 或 post 。用 get 修改服务器上的数据是一个坏主意。其次，我假设你将对每个问题做一个答案。如果是这样，您应该对成员执行操作，而不是集合。此外，在您的回答操作中，您还有 params [：id] 。如果您尝试对集合而不是成员执行操作，则不会获得 params [：id] 。

When submitting an answer I get this error:

ActiveRecord::RecordNotFound (Couldn't find Question with ID=answer):
  app/controllers/questions_controller.rb:6:in `show'

From what I understand I either made a error with passing an argument from the form or didn`t define it correctly in my controller.

Would appreciate some help finding this bug, thanks in advance!

Questions_Controller:

class QuestionsController < ApplicationController
  def index
  end

  def show
      @question = Question.find(params[:id])
      @choices = @question.choices
  end

  def answer
      @choice = Choice.find(:first, :conditions => { :id => params[:id] })
      @answer = Answer.create(:question_id => @choice.question_id, :choice_id => @choice.id)

      if Question.last == @choice.question
        render :action => "thank_you"
      else
        question = Question.find(:first, :conditions => { :position => (@choice.question.position + 1) })
        redirect_to question_path(:id => question.id)
      end
   end
end

views/questions/show.html.erb :

<div data-role="content">
  <div align="center">
    <h3><%= @question.question %></h3>
  </div>
  <br><br>
  <ul data-role="listview">
    <% @choices.each_with_index do |c, i| %>
      <% i = i + 1 %>
      <li data-theme="c">
        <%= link_to "#{i}. #{c.choice}", answer_questions_path(:id => c.id) %>
      </li>
    <% end %>
  </ul>
</div>

::EDIT::

This happens when I try to select a choice & submit an answer while on the first question.

Started GET "/questions/1" for 127.0.0.1 at Thu Dec 01 01:38:36 -0500 2011
  Processing by QuestionsController#show as 
  Parameters: {"id"=>"1"}
  SQL (0.6ms)   SELECT name
 FROM sqlite_master
 WHERE type = 'table' AND NOT name = 'sqlite_sequence'
  Question Load (0.3ms)  SELECT "questions".* FROM "questions" WHERE "questions"."id" = 1 LIMIT 1
  Choice Load (10.8ms)  SELECT "choices".* FROM "choices" WHERE ("choices".question_id = 1)
Rendered questions/show.html.erb within layouts/application (28.8ms)
Completed 200 OK in 424ms (Views: 118.0ms | ActiveRecord: 11.6ms)


Started GET "/questions/answer?id=1" for 127.0.0.1 at Thu Dec 01 01:38:38 -0500 2011
  Processing by QuestionsController#show as 
  Parameters: {"id"=>"answer"}
  Question Load (0.1ms)  SELECT "questions".* FROM "questions" WHERE "questions"."id" = 0 LIMIT 1
Completed   in 10ms

ActiveRecord::RecordNotFound (Couldn't find Question with ID=answer):
  app/controllers/questions_controller.rb:6:in `show'

Hope this helps.

解决方案

My best guess is that you don't have a route correctly setup. Assuming that you're using Rails 3 and you're using resources, you need to do add the following:

resources :questions do 
  member do
     put 'answer'
  end
end

This will create a route like /questions/#{id}/answer.

Answer is not an HTTP verb, so using resources in your routes will not create a route to your answer action.

Edit based on comment:

First, if you're updating or creating data, you should use put or post. It's a bad idea to modify data on the server with a get. Secondly, I assume that you would be doing an answer per question. If that is the case, you should do the action on a member, not a collection. Also, in your answer action, you have params[:id]. You won't get params[:id] if you try to do an action on a collection rather than a member.

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