Question

I want the next thing:
when the button is clicked, I want to print the params[:id] of the welcome controller.

this is my java script code:

$(".btn_skip").click(function() {
    $.ajax({
        url: '/welcome',
        type: 'PUT',
        data: {show_msg: $("#mycheckbox").is(":checked")}
    });
});

and this is my welcome_controller.rb:

class WelcomeController < ApplicationController
def update
    @user = User.find(params[:id])
    puts params[:id]
    end
end

when I ran: rails s and pressed the button (btn_skip), I got:

Started PUT "/welcome" for 127.0.0.1 at 2013-02-05 12:18:26 +0200

ActionController::RoutingError (No route matches [PUT] "/welcome"):

routes.rb:

resources :welcome

rake routes:

welcome_index GET    /welcome(.:format)          welcome#index
              POST   /welcome(.:format)          welcome#create
new_welcome   GET    /welcome/new(.:format)      welcome#new
edit_welcome  GET    /welcome/:id/edit(.:format) welcome#edit
welcome       GET    /welcome/:id(.:format)      welcome#show
              PUT    /welcome/:id(.:format)      welcome#update
              DELETE /welcome/:id(.:format)      welcome#destroy

maybe, should I pass the id in url: '/welcome'?

if so, how can I get the id? maybe by: url: ‘/welcome/#{:id}’?

any help appreciated!

Answer 1

I would recommend you to use rails form helper instead of plain html. Anyways Its your choice, with the current implementation you can add a hidden field to the form. I am assuming you want to pass the current_user’s id to update action.

<input type="hidden" id="current_user" value="<%= current_user.id %>" />

Now in your javascript code:

$("#submit").click(function() {
  user_id = $('#current_user').val();
  $.ajax({
    ## the url is the controller
    url: '/welcome' + user_id,
    type: 'PUT',
    data: {show_msg: $("#mycheckbox").is(":checked")}
  });
});

Thats it! It will fetch the user id and will pass to update action auto-magically. 🙂