NoMethodError在ArticlesController＃編輯

我知道了上述標題相同的問題，但它也可能沒有解決我的問題。我使用Rails練習：Getting Started Guide，當我在本教程試圖更新文章我得到了以下（NoMethodError in ArticlesController#edit）錯誤：NoMethodError在ArticlesController＃編輯

Errors

這裏是控制器文件：

class ArticlesController < ApplicationController 
    def new 
    @article = Article.new 
    end 

    def show 
    @article = Article.find(params[:id]) 
    end 

    def index 
    @articles = Article.all 
    end 

    def create 
    @article = Article.new(article_params) 

    if @article.save 
     redirect_to @article 
    else 
     render 'new' 
    end 
    end 

    def edit 
   @article = Article.find(params[:id]) 
    end 

    def update 
    @article = Article.find(params[:id]) 

    if @article.update(article_params) 
     redirect_to @article 
    else 
     render 'edit' 
    end 
    end 

    private 
    def article_params 
     params.require(:article).permit(:title, :contents) 
    end 
end

這裏是編輯視圖

<h1>Editing article</h1> 
  
<%= form_for :article, url: article_path(@article), method: :patch do |f| %> 
  <% if @article.errors.any? %> 
  <div id="error_explanation"> 
    <h2><%= pluralize(@article.errors.count, "error") %> prohibited 
      this article from being saved:</h2> 
    <ul> 
    <% @article.errors.full_messages.each do |msg| %> 
      <li><%= msg %></li> 
    <% end %> 
    </ul> 
  </div> 
  <% end %> 
  <p> 
    <%= f.label :title %><br> 
    <%= f.text_field :title %> 
  </p> 
  
  <p> 
    <%= f.label :contents %><br> 
    <%= f.text_area :contents %> 
  </p> 
  
  <p> 
    <%= f.submit %> 
  </p> 
<% end %> 
  
<%= link_to 'Back', articles_path %>

編輯這裏是全部跟蹤：

app/controllers/articles_controller.rb:25:in `edit' 
actionpack (4.1.1) lib/action_controller/metal/implicit_render.rb:4:in `send_action' 
actionpack (4.1.1) lib/abstract_controller/base.rb:189:in `process_action' 
actionpack (4.1.1) lib/action_controller/metal/rendering.rb:10:in `process_action' 
actionpack (4.1.1) lib/abstract_controller/callbacks.rb:20:in `block in process_action' 
activesupport (4.1.1) lib/active_support/callbacks.rb:113:in `call' 
activesupport (4.1.1) lib/active_support/callbacks.rb:113:in `call' 
activesupport (4.1.1) lib/active_support/callbacks.rb:229:in `block in halting' 
activesupport (4.1.1) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.1) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.1) lib/active_support/callbacks.rb:166:in `call' 
activesupport (4.1.1) lib/active_support/callbacks.rb:166:in `block in halting' 
activesupport (4.1.1) lib/active_support/callbacks.rb:86:in `call' 
activesupport (4.1.1) lib/active_support/callbacks.rb:86:in `run_callbacks' 
actionpack (4.1.1) lib/abstract_controller/callbacks.rb:19:in `process_action' 
actionpack (4.1.1) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (4.1.1) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' 
activesupport (4.1.1) lib/active_support/notifications.rb:159:in `block in instrument' 
activesupport (4.1.1) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (4.1.1) lib/active_support/notifications.rb:159:in `instrument' 
actionpack (4.1.1) lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
actionpack (4.1.1) lib/action_controller/metal/params_wrapper.rb:250:in `process_action' 
activerecord (4.1.1) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (4.1.1) lib/abstract_controller/base.rb:136:in `process' 
actionview (4.1.1) lib/action_view/rendering.rb:30:in `process' 
actionpack (4.1.1) lib/action_controller/metal.rb:195:in `dispatch' 
actionpack (4.1.1) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' 
actionpack (4.1.1) lib/action_controller/metal.rb:231:in `block in action' 
actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:80:in `call' 
actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:80:in `dispatch' 
actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:48:in `call' 
actionpack (4.1.1) lib/action_dispatch/journey/router.rb:71:in `block in call' 
actionpack (4.1.1) lib/action_dispatch/journey/router.rb:59:in `each' 
actionpack (4.1.1) lib/action_dispatch/journey/router.rb:59:in `call' 
actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:676:in `call' 
rack (1.5.2) lib/rack/etag.rb:23:in `call' 
rack (1.5.2) lib/rack/conditionalget.rb:25:in `call' 
rack (1.5.2) lib/rack/head.rb:11:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/params_parser.rb:27:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/flash.rb:254:in `call' 
rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context' 
rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/cookies.rb:560:in `call' 
activerecord (4.1.1) lib/active_record/query_cache.rb:36:in `call' 
activerecord (4.1.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call' 
activerecord (4.1.1) lib/active_record/migration.rb:380:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
activesupport (4.1.1) lib/active_support/callbacks.rb:82:in `run_callbacks' 
actionpack (4.1.1) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/reloader.rb:73:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/remote_ip.rb:76:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
railties (4.1.1) lib/rails/rack/logger.rb:38:in `call_app' 
railties (4.1.1) lib/rails/rack/logger.rb:20:in `block in call' 
activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in `block in tagged' 
activesupport (4.1.1) lib/active_support/tagged_logging.rb:26:in `tagged' 
activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in `tagged' 
railties (4.1.1) lib/rails/rack/logger.rb:20:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/request_id.rb:21:in `call' 
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call' 
rack (1.5.2) lib/rack/runtime.rb:17:in `call' 
activesupport (4.1.1) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
actionpack (4.1.1) lib/action_dispatch/middleware/static.rb:64:in `call' 
rack (1.5.2) lib/rack/sendfile.rb:112:in `call' 
railties (4.1.1) lib/rails/engine.rb:514:in `call' 
railties (4.1.1) lib/rails/application.rb:144:in `call' 
rack (1.5.2) lib/rack/lock.rb:17:in `call' 
rack (1.5.2) lib/rack/content_length.rb:14:in `call' 
rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service' 
/Users/apple/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service' 
/Users/apple/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run' 
/Users/apple/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'

來源

2014-05-20 lee

顯然你錯過了'文章'模型。你創造了嗎？你有沒有遷移你的數據庫？ –

是的，我有** ** article.rb文件到文件夾模式 – lee

下面是文章模型的內容：**類文章<的ActiveRecord :: Base的 \t驗證：標題，存在：真，長度：{最低： 5} end ** – lee

Lee，這樣做：

def edit 
    @article = Article.find params[:id] 
end

我的系統使用ASCII，所以上面的文字應該是沒有錯誤的（如每@Arup的評論）

考慮到你有article.rb設置爲Class Article < ActiveRecord::Base，我不明白爲什麼這不起作用？

來源

2014-05-20 11:43:35

Rich我100％確定。插入了一個垃圾字符。您可以在錯誤消息中看到。它來了 - > **'** < - 。 –

對我也是 - 它不會發布 –

奧雅納Rakshit你的權利。我複製粘貼命令** def編輯 @article = Article.find params [：id] 結束** – lee

NoMethodError在ArticlesController＃編輯

回答

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