How can I call javascript functions from controller action using ROR

Question

Can anybody help me to resolve a small issue ?Actually I want to call some javascript functions from controller action method.I have written some code but it is not working.As I am totally new to ROR may be i have done mistake somewhere.Please check my below code snippets and modify these to run those successfully.

My code snippets are as follows.

views/users/index.html.erb:

<center>
    <h1>....Testing...</h1>
    <p>
        <a href="/users/browser"><button type="button">Check Browser</button></a>
    </p>
    <p>
        <a href="/users/time"><button type="button">Check Time</button></a>
    </p>
</center>

controller/users_controller.rb:

class UsersController < ApplicationController
    def index

    end
    def browser
        respond_to do |format|
            format.js{render :js => "my_browser();"}
        end
    end
    def time
        respond_to do |format|
            format.js{render :js => "my_time();"}
        end
    end
end

application.js:

function my_browser(){
    console.log('my browser function');
    var objOffsetVersion;
    if (objOffsetVersion=navigator.userAgent("chrome") != -1) {
        objOffsetVersion="chrome"
    };
    alert(objOffsetVersion) ;
}
function my_time(){
    var d = new Date();
    var currtime = d.getHours() * 100 + d.getMinutes();
    alert(currtime);
}

routes.rb

Jscript::Application.routes.draw do
  root :to => "users#index"
  get "users/browser" => "users#browser"
  get "users/time" => "users#time"
end

Please help me..Thanks in advance.

check this stackoverflow.com/questions/5017114/…

Gagan Gami
– Gagan Gami

2015-02-09 09:37:50 +00:00
Commented Feb 9, 2015 at 9:37 — Gagan Gami
– Gagan Gami, Commented Feb 9, 2015 at 9:37

Milan Köpke · Accepted Answer · 2015-02-09 09:17:04Z

0

Try changing your links to use js format, as you are specifically telling your controller to handle js via format.js blocks:

<center>
  <h1>....Testing...</h1>
  <p>
      <a href="/users/browser.js"><button type="button">Check Browser</button></a>
  </p>
  <p>
    <a href="/users/time.js"><button type="button">Check Time</button></a>
  </p>
</center>

As an alternative you could tell rails to always render js in the controller for all formats:

class UsersController < ApplicationController
  def index
  end

  def browser
    render :js => "my_browser();"
  end

  def time
    render :js => "my_time();"
  end
end

Hope this provides some help.

answered Feb 9, 2015 at 9:17

Milan Köpke

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1 Comment

user4502366 Over a year ago

As per your instruction after editing your code i am getting only string(i.e-my_browser) as result.But my objective is call the my_browser function and execute the alert prompt within it.Any more suggestion..?

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