ruby-on-rails - Rails 将验证放在模块混合中？

Question

一些验证在我的模型中是重复的:

validates :name, :length => { :minimum => 2 }, :presence => true, :uniqueness => true
validates :name_seo, :length => { :minimum => 2 }, :presence => true, :uniqueness => true

我如何将其放入混音中？如果我只是将它们放入 mixin 中，我会收到此错误

app/models/validations.rb:5: undefined method `validates' for Validations:Module (NoMethodError)

Answer 1

module Validations
  extend ActiveSupport::Concern

  included do
    validates :name, :length => { :minimum => 2 }, :presence => true, :uniqueness => true
    validates :name_seo, :length => { :minimum => 2 }, :presence => true, :uniqueness => true
  end
end

validates 宏必须在包含程序的上下文中进行评估，而不是在模块的上下文中进行评估(就像您可能正在做的那样)。