ruby on rails jquery not calling the right controller action

Question

I read all the answers that popped up when I started posting this question but they don't seem to solve my issue.

I added a new action called get_results to my controller (in addition to the ones that were created via scaffolding), but every time I change the choice in the select menu, it directs me to "edit" action, not "get_results",

This is the js

<script type="text/JavaScript">
$(function(){
  $('.menu_class').bind('change', function(){
      $.ajax('#{:controller => "my_tests", :action => "get_results"}?param_one=' + $(this).val());
  });
});
</script>

EDIT : this is the js code that worked for me, THANKS to Robin's answer below:

<script type="text/JavaScript">
$(function(){
  $('.menu_class').bind('change', function(){
    $.ajax({
      url: "<%= get_results_my_tests_url %>",
      data: {
        param_one: $(this).val()
      }
    });
  });
});
</script>

This is the action I added (snippets)

def get_results

  # some stuff goes here

  respond_to do |format|
    if @my_test.update_attributes(params[:my_test])
      format.html
      format.js
    else
      format.html { render :action => "update" }
      format.json { render :json => @my_test.errors, :status => :unprocessable_entity }
    end
  end
end

I added a specific route for it into my routes.rb

MyTests::Application.routes.draw do

  resources :my_tests
  get "home/index"
  match '/my_tests/get_results' => 'my_tests#get_results', :as => :get_results
  match ':controller(/:action(/:id(.:format)))'
  root :to => 'home#index'
end

EDIT : this is the routes config that worked for me, THANKS to Robin's answer below:

resources :my_tests do
  collection do
    get :get_results
  end
end

rake routes gives me this

my_tests     GET    /my_tests(.:format)                    {:action=>"index", :controller=>"my_tests"}
             POST   /my_tests(.:format)                    {:action=>"create", :controller=>"my_tests"}
new_my_test  GET    /my_tests/new(.:format)                {:action=>"new", :controller=>"my_tests"}
edit_my_test GET    /my_tests/:id/edit(.:format)           {:action=>"edit", :controller=>"my_tests"}
my_test      GET    /my_tests/:id(.:format)                {:action=>"show", :controller=>"my_tests"}
             PUT    /my_tests/:id(.:format)                {:action=>"update", :controller=>"my_tests"}
             DELETE /my_tests/:id(.:format)                {:action=>"destroy", :controller=>"my_tests"}
home_index   GET    /home/index(.:format)                  {:action=>"index", :controller=>"home"}
get_results         /my_tests/get_results(.:format)        {:action=>"get_results", :controller=>"my_tests"}
                    /:controller(/:action(/:id(.:format)))
      root          /                                      {:action=>"index", :controller=>"home"}

So why is it always directing me to "edit" action and not "get_results"?

Answer 1

Try this:

Your javascript should be

<script type="text/JavaScript">
    $(function(){
         $('.menu_class').bind('change', function(){
             $.ajax({
               url: "<%= get_results_my_tests_url %>",
               data: {
                   param_one: $(this).val()
               }
             });
         });
     });
</script>

Your routes:

resources :my_tests do
    # if "/my_tests/get_results" is really what you want
    collection do
        get :get_results
    end
    #if "/my_tests/1/get_results" is what you actually want
    #it would make more sense, especially because you have @my_test in the controller
    member do
        get :get_results
    end
end

Answer 2

$.ajax('#{:controller => "my_tests", :action => "get_results"}?param_one=' + $(this).val());

Since there is no ERB in that snippet, the above will just be a normal string in JS. It will construct a url like:

http://example.com/the_current_page#{:controller => "my_tests", :action => ....

and the part of the URL after the # won't get sent to the server. Take a look at it in the network panel and it should be clear what's happening.