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POAjax submissions with jquery in rails not working
 

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    <p>I've been trying to implement a commenting system for my Rails app. Every event in my app has it's own page, and on the page is a comments thread. I want users to be able to submit comments using ajax. I have tried to follow RailsCast 136, which is basically what I want to have work in my app. However, whenever I post a comment, the ajax request is not going through, and I'm receiving the error:</p> <blockquote> <p>Started POST "/events/undefined" for 127.0.0.1 at 2011-07-17 00:39:16 -0400</p> <p>ActionController::RoutingError (No route matches "/events/undefined"):</p> </blockquote> <p>Here's the code for my show action in my events_controller. </p> <blockquote> <p>def show</p> <pre><code>@event = Event.find(params[:id]) @comment = Comment.new session[:event_id] = @event.id @comments = @event.comments.reverse end </code></pre> </blockquote> <p>Here's the code for my comment form in my event show view. </p> <blockquote> <p> &lt;%= form_for(@comment, :remote => true) do |f| %> &lt;% if signed_in? %> <p>&lt;%= f.label :author %><br /> &lt;%= f.text_field :author, :value => current_user.name %></p> &lt;% else %> <p>&lt;%= f.label :author %><br /> &lt;%= f.text_field :author %></p><br> &lt;% end %></p> <pre><code> &lt;p&gt;&lt;%= f.label :content %&gt;&lt;br /&gt; &lt;%= f.text_field :content %&gt;&lt;/p&gt; &lt;p&gt;&lt;%= f.submit %&gt;&lt;/p&gt; &lt;% end %&gt; &lt;/div&gt; </code></pre> </blockquote> <p>Here's the code for my create action in my comments_controller. </p> <blockquote> <pre><code>def create @comment = Comment.create!(params[:comment]) @comment.event_id = session[:event_id] session[:event_id] = nil flash[:success] = "Comment sent!" respond_to do |format| format.html { redirect_to @comment.event } format.js end end </code></pre> </blockquote> <p>Here's the jQuery code for posting with ajax. It is pretty much the same as the code outlined by RailsCast 136</p> <blockquote> <p>jQuery.ajaxSetup({ 'beforeSend': function(xhr) {xhr.setRequestHeader("Accept", "text/javascript")} })</p> <p>$(document).ready(function(){ $("#commentform").submit(function(){ $.post($(this).attr("action"), $(this).serialize(), null, "script"); return false; }) })</p> </blockquote> <p>Anybody have any idea what could be going wrong? I'm very new to Rails and web development in general and appreciate any help fixing this.</p> <p>EDIT: I managed to fiddle around and fix the problem. I essentially followed the solution that vinceh laid out in addition to nesting my routes and got it to work. Thanks guys.</p> <p>Thanks so much, Sid</p>
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