使 before_validation 等在 ActiveModel 中工作的正确方法是什么 [英] What's the correct way to make before_validation, etc. work in an ActiveModel

问题描述

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

Should I extend or include ActiveModel:Validations:Callbacks:ClassMethods or ActiveModel:Validations:Callbacks?

推荐答案

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

让所有东西都按顺序排列很重要.

It's important that you have everything in that order.

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