无法为CommentsController - Ruby Tutorial找到动作'show'

Question

我试图按照以下指南启动Ruby on Rails.一切顺利,直到我试图销毁(删除评论).

我收到以下错误:找不到CommentsController的动作'show'

我将在下面发布我的代码.

http://guides.rubyonrails.org/getting_started.html

comments_controller.rb

class CommentsController < ApplicationController

  http_basic_authenticate_with name: "dhh", password: "secret", only: :destroy

    def create
        @article = Article.find(params[:article_id])
        @comment = @article.comments.create(comment_params)
        redirect_to article_path(@article)
    end

    def destroy
        @article = Article.find(params[:article_id])
        @comment = @article.comments.find(params[:id])
        @comment.destroy
        redirect_to article_path(@article)
    end

    private
        def comment_params
          params.require(:comment).permit(:commenter, :body)
        end

end

articles_controller

class ArticlesController < ApplicationController

 http_basic_authenticate_with name: "dhh", password: "secret", except: [:index, :show]

    def index
       @articles = Article.all
    end

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

    def new
        @article = Article.new 
    end

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

    def create
      @article = Article.new(article_params)

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

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

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

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

      redirect_to articles_path
    end

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

的routes.rb

Rails.application.routes.draw do

  resources :articles do
    resources :comments
  end

  root 'welcome#index'
end

article.rb

class Article < ActiveRecord::Base

    has_many :comments, dependent: :destroy

    validates :title, presence: true,
                      length: { minimum: 5}
end

comment.rb

class Comment < ActiveRecord::Base
  belongs_to :article
end

文章/ index.html.erb

<h1>Listing Articles</h1>

<%= link_to 'New article', new_article_path %>

<table>
  <tr>
    <th>Title</th>
    <th>Text</th>
    <th colspan="3"></th>
  </tr>

  <% @articles.each do |article| %>
    <tr>
      <td><%= article.title %></td>
      <td><%= article.text %></td>
      <td><%= link_to 'Show', article_path(article) %></td>
      <td><%= link_to 'Edit', edit_article_path(article) %></td>
      <td><%= link_to 'Destroy', article_path(article),
              method: :delete,
              data: { confirm: 'Are you sure?' } %></td>
    </tr>
  <% end %>
</table>

只是不确定它是什么.请指教.如果需要,我会提供更多代码.

Answer 1

答案将在您的routes.rb和您尝试调用的URL中.

URL可能是/comment/123,并且routes.rb可能具有类似get 'comment/:id' => 'comment#show'的内容(或resource注释语句).

因此rails尝试显示页面以进行注释,但您没有实现该功能.错误消息正在说明它需要说什么(你的确没有.show方法CommentsController).

如果我的猜测不正确,请发布您的routes.rb和您要求的网址.