# Chuck this in config/initializers for view-first validations
ActionView::Base.default_form_builder.class_eval do
  def error(field)
    errors(field).first
  end
  def errors(field)
    object.errors.for(field)
  end
end

ActiveRecord::Errors.class_eval do
  def generate_message(attribute, message = :invalid, options = {})
    message
  end

  def for(attribute)
    case err = self.on(attribute)
    when String, Symbol: [err]
    when Array: err
    when NilClass: []
    end
  end
end