Rails - Escaping JavaScript in error proc

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.

Chris Salzberg · Accepted Answer · 2012-10-11 02:40:11Z

3

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

answered Oct 11, 2012 at 2:40

Chris Salzberg

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