Question

I have a custom error proc that gets initialised in application.rb:

config.action_view.field_error_proc = Proc.new do |html_tag, object|
  error_msg = object.error_message.join(", ")
  "<span class='field_with_errors' data-error='#{error_msg}'>#{html_tag}</span>".html_safe
end

I would like to escape javascript, so I modify it:

config.action_view.field_error_proc = Proc.new do |html_tag, object|
  error_msg = object.error_message.join(", ")
  "<span class='field_with_errors' data-error='#{escape_javascript(error_msg)}'>#{html_tag}</span>".html_safe
end

However I get the following error:

undefined method `escape_javascript' for #<MyApp::Application:0x00000006edd2e8>

I’m using rails 3.0

Any tips would be greatly appreciated.

Answer 1

You have to include the helper in order for it to be available. This should work:

include ActionView::Helpers::JavaScriptHelper

config.action_view.field_error_proc = Proc.new do |html_tag, object|
  error_msg = object.error_message.join(", ")
  "<span class='field_with_errors' data-error='#{escape_javascript(error_msg)}'>#{html_tag}</span>".html_safe
end