从JavaScript调用Rails Controller操作不显示

Question

I am trying to call a controller-action from javascript.

The chrome debugger shows the javascript being stepped into ok (so the js click event is triggered ok).

The controller action works if I use a HTML button to call it ie the /home/benefits/ page renders ok (so the controller action code in itself is functional).

It does not seem to work when I try call it via javascript - the development.log seems to show it has rendered the page, but my website page does not change to the /home/benefits/ page

I've read as many tutorials and related issues on OS but I'm stumped. Any help would be appreciated from this awesome SO community! ;-)

CONTROLLER CODE:

  def set_analysis_input
     redirect_to home_benefits_path
  end    

ROUTES.RB:

  get "trades/set_analysis_input"

HTML.ERB: (1st line using html button is ok, 2nd line via JS does not work)

<%= link_to "Button to Call Action", trades_set_analysis_input_path, class: "btn btn-small btn-success" %>
<button id="button_to_call_controller_action">hello</button>

JS AT END OF HTML.ERB FILE:

console.log("Entered JS");

  $(document).on('click', '#button_to_call_controller_action', function() {
    url_string = "/trades/set_analysis_input";
    $.ajax({
       url:   url_string,
       type:  'get'
    });  
  }); 

END OF DEVELOPMENT.LOG FILE:

Started GET "/trades/set_analysis_input" for 127.0.0.1 at 2014-11-15 12:47:44 +0000
Processing by TradesController#set_analysis_input as */*
  User Load (0.0ms)  SELECT "users".* FROM "users" WHERE "users"."id" = 38 ORDER BY "users"."id" ASC LIMIT 1
Redirected to http://localhost:3000/home/benefits
Completed 302 Found in 3ms (ActiveRecord: 0.0ms)


Started GET "/home/benefits" for 127.0.0.1 at 2014-11-15 12:47:44 +0000
Processing by HomeController#benefits as */*
  Rendered home/benefits.html.erb within layouts/application (0.0ms)
  User Load (0.0ms)  SELECT "users".* FROM "users" WHERE "users"."id" = 38 ORDER BY "users"."id" ASC LIMIT 1
  Rendered layouts/_header.html.erb (0.0ms)
Completed 200 OK in 79ms (Views: 79.4ms | ActiveRecord: 0.0ms)

Answer 1

Welcome to StackOverflow. The issue is that you are calling a controller action with a redirect_to in it, which is where the

Completed 302 Found in 3ms (ActiveRecord: 0.0ms)

is coming from. If the ajax call gets a 302, you will have that issue.