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module ActionView module Helpers module FormHelper FIELD_ERROR_OPTIONS = {:tag_name => 'dd', :class => 'FormError'} def field_error(object,field,*args) options = args.last.is_a?(Hash) ? args.pop : {} options = FIELD_ERROR_OPTIONS.merge(options) if (errors = object.errors.on(field)) error_message = case when errors.is_a?(String) errors when errors.is_a?(Array) tag(:ul, nil, true) + (errors.collect { |e| content_tag(:li, e) }).to_s + "</ul>" end error_message = %{#{options[:prefix]} #{error_message}} if options[:prefix] content_tag(options[:tag_name], error_message, :class => options[:class]) end end end class FormBuilder def field_error(method, options={}) @template.field_error(@object, method, options) end end end end