# I want to be able to use error_message_on() in my form builder.
# I've tried requiring 'form_helper' in different places.
# I tried using different combos of name spaces from ActionView::Base::Helpers::ActiveRecordHelper
# I am also not sure where I should get the object to pass to the error_message_on.
# Any ideas would be appreciated.

## /app/helpers/form_builder_helper.rb

module FormBuilderHelper

  class MyFormBuilder < ActionView::Helpers::FormBuilder

    selectors = field_helpers - %w(hidden_field)
    selectors.each do |selector|
      src = <<-END_SRC
        def #{selector}(field, options = {})
          @template.content_tag("p", super + error_message_on(@object, field))
        end
      END_SRC
      class_eval src, __FILE__, __LINE__
    end

  end

end