Ruby on Rails教程在表演中销毁动作结果

Question

I'm following the tutorial and having an annoying problem when trying to delete/destroy a record in my model. 我正在阅读本教程，并尝试删除/销毁模型中的记录时遇到烦人的问题。 The destroy action seems to result in a show action. 破坏动作似乎导致表演动作。 A lot of the information online suggests it's a javascript problem but application.js already contains //= require jquery_ujs and //= require jquery. 在线大量信息表明这是一个JavaScript问题，但是application.js已经包含// = require jquery_ujs和// = require jquery。
( http://guides.rubyonrails.org/getting_started.html ) （ http://guides.rubyonrails.org/getting_started.html ）

index.html.erb index.html.erb

         <h1>Hello, Rails!</h1>
    <%= link_to 'My Blog', controller: 'articles' %>

    <h1>Listing articles</h1>
     <%= link_to 'New article', new_article_path %>
    <table>
      <tr>
        <th>Title</th>
        <th>Text</th>
        <th>Genre</th>
        <th>Ratings</th>
        <th colspan="3"></th>
      </tr>

      <% @articles.each do |article| %>
        <tr>
          <td><%= article.title %></td>
          <td><%= article.text %></td>
          <td><%= article.genre %></td>
          <td><%= article.ratings %></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>

    <%= link_to 'Back', articles_path %>

articles_controller.rb articles_controller.rb

class ArticlesController < ApplicationController
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

end

    private 

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

application.html.erb application.html.erb

<!DOCTYPE html>
<html>
<head>
  <title>Blog</title>
  <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
  <%= javascript_include_tag :default, 'data-turbolinks-track' => true %>

  <%= csrf_meta_tags %>
</head>
<body>

<%= yield %>

</body>
</html>

Answer 1

Had this problem before... 之前有这个问题...

-- -

It's basically because you've not included JQuery UJS in your application / layout. 基本上是因为您没有在应用程序/布局中包含JQuery UJS。

Rails makes the delete method work by assigning some JS to change the request from GET to DELETE whenever you click it. 每当您单击它时，Rails都会分配一些JS将请求从GET更改为DELETE从而使delete方法起作用。

The main reason why destroy links don't work (yours is routing to show , which basically means it's using GET rather than DELETE ) is because Rails is not translating your method properly: destroy链接不起作用的主要原因（您正在路由到show ，这基本上意味着它正在使用GET而不是DELETE ）是因为Rails没有正确转换您的method ：

#app/assets/javascripts/application.js
//= require jquery
//= require jquery_ujs

#app/views/layouts/application.html.erb
<%= javascript_include_tag "application" %>

Some tips: 一些技巧：

#app/views/articles/index.html.erb
<%= content_tag :h1, "Hello, Rails!" %>
<%= link_to 'My Blog', articles_path %>

<%= content_tag :h1, "Listing articles" %>
<%= link_to 'New article', new_article_path %>

<%  attrs = %i(title text genre ratings) %>
<%= content_tag :table do %>
   <%= content_tag :tr do %>
       <% attrs.each do |attr| %>
          <%= content_tag :th, attr.to_s.titleize %>
       <% end %>
       <%= content_tag :th, "&nbsp;", colspan: 3 %>
   <% end %>
<% end %>

 <% @articles.each do |article| %>
    <%= content_tag :tr do %>
       <% attrs.each do |attr| %>
          <%= content_tag :td, article.send(attr) %>
       <% end %>
    <% end %>
    <%= content_tag :td, link_to('Show', article) %>
    <%= content_tag :td, link_to('Edit', edit_article_path(article)) %>
    <%= content_tag :td, link_to('Destroy', article, method: :delete, data: { confirm: 'Are you sure?' } %>
  <% end %>
<% end %>

<%= link_to 'Back', articles_path %>

You don't have to use content_tag at all, I just find it better to use it than vanilla HTML (makes sure any future code is supported). 您根本不需要使用content_tag ，我发现使用它比使用原始HTML更好（确保将来支持任何代码）。

Also, try your best to use loops wherever you can. 另外，请尽可能使用loops 。 So many people repeat code needlessly: 如此多的人不必要地重复代码：

<td><%= @article.title %></td>
<td><%= @article.text %></td>
<td><%= @article.date %></td>
<td><%= @article.news %></td>

... ...

<% attrs = %i(title text date news) %>
<% attrs.each do |a| %>
   <td><%= @article.send a %></td>
<% end %>

Ruby on Rails教程在表演中销毁动作结果

问题描述

1 个解决方案

解决方案1
3 已采纳 2015-10-25 11:25:15

Ruby on Rails教程在表演中销毁动作结果

问题描述

1 个解决方案

解决方案1 3 已采纳 2015-10-25 11:25:15

解决方案1
3 已采纳 2015-10-25 11:25:15