Trying to extend ActionView::Helpers::FormBuilder

Question

I am trying to DRY up some code by moving some logic into the FormBuilder. After reading the documentation about how to select and alternative form builder the logical solution for me seemed to be something like this.

In the view

<% form_for @event, :builder => TestFormBuilder do |f| %>
    <%= f.test  %>
    <%= f.submit 'Update' %>
<% end %>

and then in app/helpers/application_helper.rb

module ApplicationHelper
    class TestFormBuilder < ActionView::Helpers::FormBuilder
        def test
            puts 'apa'
        end
    end
end

This, however, gives me an error at the "form_for"

  uninitialized constant ActionView::Base::CompiledTemplates::TestFormBuilder

Where am I doing it wrong?

Answer 1

try with :

form_for @event, :builder => ApplicationHelper::TestFormBuilder do |f|