Question

I’m trying to send data to my Ruby on Rails application via an AJAX POST request.
This works fine on the index page where it just accepts the POST request and takes the parameter for usage like params[:MyParam], however when trying to do the exact same thing in my show action, I get the error:

No route matches [POST]

I’m sending the POST request like so:

 <% if !params[:recData] %>
var PostDone = false;
 <% end %>
 $(document).ready(function() {
   $.post(document.URL, { recData: "POST REQUEST!" }, function(response) { 
  if(PostDone == false) {
    document.write(response);
    PostDone = true;
  }
  });
 });

I’m kind of new to AJAX and Rails, so a helping hand would be much appreciated.

Answer 1

Ok first of all if you read this you know that resources :products adds following route

Verb    Path    action  used for
POST  /products create  create a new product

also routes are matched from the top so since you have

resources :products # matches '/products' via POST
match '/products' => 'products#index', :via => :post

each time you have POST request to the '/products' first route defined with resources :products is matched

show action works because it is also defined with resources :products but only for GET method

now workarounds

change order to

match '/products' => 'products#index', :via => :post
resources :products # never matched '/products' via POST

or use :except

resources :products, :except => :create # does not match '/products' via POST
match '/products' => 'products#index', :via => :post

in both cases your create action will newer be matched