Question

I need to seed a javascript variable to the controller. For example, if my code in the view is the following –

    ...  <script type="text/javascript">
           variable_test = 'hello'
         </script> 
    ...

I need the controller to get variable_test , like –

 def hello
 @variable_test = #Some code
 # @variable_test => 'hello'
 end

The view is hello of course, and ‘Some code’ is what I don’t know how to do.

Answer 1

You can’t send client side code to the controller unless you do a get, or post, of some sort. Try using jQuery’s post or get methods. If you aren’t using jQuery then you can do something like this:

var variable_test = 'hello';
var el = document.createElement('script');
el.setAttribute('src', 'path_to_controller' + '?variable_test=' + variable_test);
document.body.appendChild(el);

then in your controller you would do:

@varliable_test = params[:varliable_test]

The syntax may be a bit off, but you get the general idea.