Ruby on Rails tutorial destroy action results in show

Question

I'm following the tutorial and having an annoying problem when trying to delete/destroy a record in my model. The destroy action seems to result in a show action. A lot of the information online suggests it's a javascript problem but application.js already contains //= require jquery_ujs and //= require jquery.
( http://guides.rubyonrails.org/getting_started.html )

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

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

<!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...

--

It's basically because you've not included JQuery UJS in your application / layout.

Rails makes the delete method work by assigning some JS to change the request from GET to DELETE whenever you click it.

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:

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

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

Some tips:

#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).

Also, try your best to use loops wherever you can. So many people repeat code needlessly:

<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 tutorial destroy action results in show

Question

1 answers

solution1
3 ACCPTED 2015-10-25 11:25:15

Ruby on Rails tutorial destroy action results in show

Question

1 answers

solution1 3 ACCPTED 2015-10-25 11:25:15

solution1
3 ACCPTED 2015-10-25 11:25:15