Question

In my index view I am looking to add a button that will execute a function called myFunction(myArg). This function is located in behaviours/myRubyFile.rb. How can I create a button that executes that function with a particular argument.

EDIT:
Now I am getting a new error

The action 'my_func' could not be found for FunctionsController

However there is a function my_func defined in FunctionsController.

Answer 1

Generally, you’d want to send a request to the server from that button, so the server runs myFunction. To achieve this follow these steps:

1 – make sure behaviours/myRubyFile.rb defines a module:

module MyRubyModule
  def myFunction(arg)
    #Your logic here
  end
end

2 – define a route in routes.rb:

match '/my_func' => "functions#my_func"

3 – define FunctionsController:

class FunctionsController < ApplicationController
  include MyRubyModule

  def my_func
    arg = params[:arg]
    myFunction(arg)
  end
end

4 – create a button in the view to send the request to the server:

<%= button_to "Button", {:action => "my_func", :controller => "functions", :arg => "YOUR ARG HERE"} %>

I haven’t tested this code, but it should do the trick.

EDIT: added :arg => "YOUR ARG HERE" to the route (Thnx nzifnab)