class SimpleForm::FormBuilder

def full_error(attribute_name, options={})


f.full_error :token #=> Token is invalid

== Examples

when errors for a hidden field need to be shown.
Return the error but also considering its name. This is used 
def full_error(attribute_name, options={})
  options = options.dup
  options[:error_prefix] ||= if object.class.respond_to?(:human_attribute_name)
    object.class.human_attribute_name(attribute_name.to_s)
  else
    attribute_name.to_s.humanize
  end
  error(attribute_name, options)
end