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POLocation of jquery.js and jquery-ujs.js and why destroy links do not work
 

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    <p>I'm a bit confused. In a lot of questions on stackoverflow I read you need <a href="https://github.com/rails/jquery-ujs" rel="nofollow">jquery-ujs</a> to manage your javascript code, especially if you want these destroy links do work. If I go on this page to follow all the installation instructions I must say I have nothing to do.</p> <p>Because I'm using <strong>Rails 3.1</strong> I have to follow this:</p> <p><em>For automated installation in Rails, use the "jquery-rails" gem. Place this in your Gemfile:</em><br> <code>gem 'jquery-rails', '&gt;= 1.0.12'</code><br> <em>And run:</em> <code>$ bundle install</code><br> <em>This next step depends on your version of Rails.</em></p> <p><em>a. For <strong>Rails 3.1</strong>, add these lines to the top of your app/assets/javascripts/application.js file:</em></p> <pre><code>//= require jquery //= require jquery_ujs </code></pre> <p>But for <strong>Rails 3.1</strong> this is already done after creating a new rails app. </p> <p>If I run <code>$ rails generate jquery:install</code> I get the following output:</p> <pre><code>deprecated You are using Rails 3.1 with the asset pipeline enabled, so this generator is not needed. The necessary files are already in your asset pipeline. Just add `//= require jquery` and `//= require jquery_ujs` to your app/assets/javascripts/application.js If you upgraded your app from Rails 3.0 and still have jquery.js, rails.js, or jquery_ujs.js in your javascripts, be sure to remove them. If you do not want the asset pipeline enabled, you may turn it off in application.rb and re-run this generator. </code></pre> <p>Okay, nothing new. But why my destroy links still doesn't work. So I ask myself the question where are these jquery files located? When I read the jquery installation instruction for another rails version, there they always tell me to copy these files (jquery.js, jquery-ujs.js) to a specific location. Only as a Ruby 3.1 user you don't have to do this. But why? I can't find these files. Are they a part of the jquery-rails gem? If yes, why my destroy links still doesn't work? Is this really an issue of jquery? I mean if I change the helper from <code>link_to</code> to <code>button_to</code> it's working. So how it can be happen as long as it should be an issue of jquery? It might not matter to me, but I don't want to use a form button. Furthermore I can't believe that an application like Rails contains such a big issue in its common generated templates.</p> <p>So how to fix this without changing the <code>link_to</code> helper and without going away from javascript (<a href="http://railscasts.com/episodes/77-destroy-without-javascript" rel="nofollow">Railscast</a>)?</p> <p><strong>Update 1</strong> </p> <ul> <li>layout file has <code>&lt;%= javascript_include_tag "application" %&gt;</code> </li> <li><code>config.assets.enabled = true</code> is set</li> </ul> <p><strong>Update 2</strong> </p> <p>Here the source for the mentioned destroy links: </p> <pre><code>&lt;%= link_to 'Destroy', @post, confirm: 'Are you sure?', method: :delete %&gt; </code></pre> <p>Usually it should delete a post, but instead the browser is pointed to the location of that post, e.g. <code>http://domain/posts/2</code>.<br> If you run this with <code>button_to</code> instead of <code>link_to</code> it will work, but then its a form button.</p> <p><strong>Update 3</strong></p> <p>Okay, the destroy links work in Firefox, but I'm a Google Chrome user and I want it to work there as well. Is there a solution for this?</p> <p><strong>Update 4</strong></p> <p>Chrome Inspector throw a DOMException on line 5122: <code>var ret = matches.call( node, expr );</code></p> <p><code>message: "SYNTAX_ERR: DOM Exception 12"</code></p> <p>But this error occurs on every hyperlink whether it's a destroy link or not.<br> The destroy link throws an <strong>TypeError</strong>.<strike>, but I can't figure out if it comes from jquery.js or from a built in chrome extension.</strike> jquery-ujs.js throws the error and the message was "<em>Are you sure?</em>". That's the text defined by rails for a confirm message. So I removed the confirm option and after that the deletion worked.</p> <p>How to make the confirmation option work in Chrome?</p>
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    1. COdo you have `<%= javscript_include_tag "application"%>` in your layout?
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      1. USJesse Wolgamott
    2. COYes. In source there are also these two `<script ...` lines with _jquery.js_ and _jquery-ujs.js_ in there.
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    3. COin your config/application.rb, do you have `config.assets.enabled = true` ?
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