CODEWITHSUNDEEP
javascriptruby-on-railsruby
user2928354
user2928354

Reputation: 9

rails ruby method invocation by Javascript

I'm working on rails app and have stumbled upon stupid yet simple problem. I need to invoke ruby method by triggering javascript button. I have a controller called Book and I'm placing method inside BooksHelper. What I want to do is simply trigger the execution of this method by button click which would output the result on the same page, I don't want that method opening another page. I've checked couple possible solutions but can't make them work. None of those methods in example.html.erb actually work. I would like to get help on how to fix the problem. It only works if I wrap up in alert method, but that's not what I want. I want the output to be printed out in the actual page. So, how can I do it? I've read the http://guides.rubyonrails.org/working_with_javascript_in_rails.html but it doesnt answer my question, since I'm not looking for creating new pages with controller and routes, but rather executing a ruby method in order to see result on the same page. Thank you!

<%= button_to_function "Output", "alert('#{outputString}')" %>
----------------------------------------------------------------------------

#app/helpers/book_helper.rb
   module BooksHelper
     def outputString
        "output"
 end
   end

-----------------------------------------------------

#app/controllers/books_controller.rb
   class PagesController < ApplicationController
      def outputString

       end
   end
  ------------------------------------------------------

  #app/views/books/example.html.erb

   <%= button_to_function "Print", "outputString" %>

   <%= button_to "Print", :action => "outputString" %>

   <input class="ok" onclick="outputString()" type="button" value="Print" />

Upvotes: 0

Views: 193

Answers (1)

cpjolicoeur
cpjolicoeur

Reputation: 13106

The controller/helper method outputString isn't available client-side once your templates are rendered.

button_to_function is for calling javascript functions via button click. You cannot call server-side functions directly from a javascript button without making an AJAX request back to the server.

Upvotes: 1

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