ruby-on-rails-3 - 使 before_validation 等在 ActiveModel 中工作的正确方法是什么

Question

我应该扩展还是包含 ActiveModel:Validations:Callbacks:ClassMethods或 ActiveModel:Validations:Callbacks ?

Answer 1

我让它像这样工作:

class Foo
  extend ActiveModel::Callbacks
  include ActiveModel::Validations
  include ActiveModel::Validations::Callbacks

  before_validation :bar

  def bar
    # callback logic here
  end
end

重要的是，您必须按照该顺序拥有所有内容。