How to pass a Javascript variable to Rails Controller?

Question

Inside my index.html.erb

<script type= "text/javascript">
  var msg = "Hello World" ;
</script>

i need pass this var msg to my controller say get_variable() method in my Post controller.

Edit : get javascript variable msg in same index.html.erb as ruby variable Thanks in Advance

yes i do know it , can you please let me know to solve this issue , if you know it ? — Big Bang Theory
– Big Bang Theory, Commented Apr 7, 2010 at 11:56
Have you tried sending the variable via AJAX to /posts/get_variable…? — deceze
– deceze ♦, Commented Apr 7, 2010 at 11:57
deceze i would like to render the variable in same page . Is it possible ? — Big Bang Theory
– Big Bang Theory, Commented Apr 7, 2010 at 12:41
Maybe you should clarify what it is you want first. Also, what's your knowledge of Javascript and AJAX? Are you starting from scratch, or are you just stuck on some specific detail? — deceze
– deceze ♦, Commented Apr 7, 2010 at 12:54

Salil · Accepted Answer · 2010-04-07 12:35:58Z

3

Try this

<%= link_to_remote, 'Message', :url=>{:controller=>'controller_name', :action=>'method_name'}, :with=> "'msg='+msg" %>

controller_name.rb

def method_name
  @message= params[:msg]
  puts @message # >> should be print "Hello World"

end

EDITED

<%= link_to_remote, 'Message', :url=>{:controller=>'controller_name', :action=>'method_name'}, :with=> "'msg='+msg" %>
<div id ='show_message'></div>

controller_name.rb

def method_name
  @message= params[:msg]
  render :update do|page|
    page.replace_html 'show_message', @message
  end
end

edited Apr 7, 2010 at 12:35

answered Apr 7, 2010 at 12:02

Salil

47.7k22 gold badges127 silver badges161 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Big Bang Theory Over a year ago

Salil , it did work but is there way in which i could display the variable in the same page ,Instead of link_to_remote

Big Bang Theory Over a year ago

I need without an link_to_remote not a evented action to display the content.

Salil Over a year ago

<%= periodically_call_remote ,:url=>{:controller=>'controller_name', :action=>'method_name'}, :with=> "'msg='+msg" , :frequency => '20' %> but this is not proper way as after every 20 sec an ajax request is sent to the server

Collectives™ on Stack Overflow

How to pass a Javascript variable to Rails Controller?

1 Answer 1

3 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Linked

Related