It needs a little tweak to make this work on rails 3, since it now
protects all strings against XSS attacks(i.e. html escapes them).
The following works:
ActionView::Base.field_error_proc = Proc.new do |html_tag, instance|
'<span class="field_with_errors">'.html_safe << html_tag <<
Obs.: dunno if there isn't a better way of doing this on rails 3.
Marcel Molina Jr. wrote: