Rails Helpers in View - undefined local variable or method in rails

Question

I have this Helper in my ApplicationHelper

module ApplicationHelper
  def sort_url
    controller_name = params[:controller] 
    url = controller_name + '/sort' 
  end
end

And in application.js.erb

url: "<%= sort_url %>",

Error:

undefined local variable or method `sort_url'

Is it in helpers/application_helper.rb ? Can you use sort_url from a .html.erb file? — Anthony Alberto
– Anthony Alberto, Commented Aug 17, 2012 at 2:28
This is a poor way to solve the problem you're having in stackoverflow.com/questions/11998518/url-in-ruby-rails/11999325 — deefour
– deefour, Commented Aug 17, 2012 at 3:21

Community · Accepted Answer · 2017-05-23 12:20:08Z

1

That is because the ApplicationHelper is only included in views by default.

The javascript file is not a view.

If you really want to use helpers in the view, you can use

<% environment.context_class.instance_eval { include MyHelper } %>

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answered Aug 17, 2012 at 4:48

ronalchn

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