Rails ActiveRecord 重构答案

【问题标题】：Rails ActiveRecord RefactorRails ActiveRecord 重构
【发布时间】：2014-06-28 14:42:24
【问题描述】：

我在OpenAir 中为每种类型的模型创建了ActiveRecord 类，并且同步代码已重构为下面的self.run_etl。我想再进一步转化

class OACategory < ActiveRecord::Base
  belongs_to :oa_cost_center, foreign_key: :cost_centerid

  def to_s
    name
  end

  def self.run_etl(logger=nil)
    open_air_type = 'Category'
    OAETL.etl(logger, OACategory.table_name, open_air_type) do |xml_node|
      OATransform.transform_attributes(OACategory, xml_node)
    end
  end
end

进入

class OACategory < ActiveRecord::Base
  belongs_to :oa_cost_center, foreign_key: :cost_centerid
  syncs_with_openair 'Category'

  def to_s
    name
  end
end

请指教。谢谢:)

【问题讨论】：

标签： ruby-on-rails ruby activerecord mixins

【解决方案1】：

我能够使用 ActiveSuppurt::Concerns

module OASync
  extend ActiveSupport::Concern

  included do
    cattr_accessor :oa_syncs_with
  end

  module ClassMethods

    def syncs_with_openair(syncs_with)
      self.oa_syncs_with = syncs_with
    end

    def run_etl(logger=nil)
      open_air_type = self.oa_syncs_with
      OAETL.etl(logger, self.table_name, open_air_type) do |xml_node|
        OATransform.transform_attributes(self, xml_node)
      end
    end
  end

end

然后在我的课堂上

class OACategory < ActiveRecord::Base
  include OASync
  syncs_with_openair 'Category'

  belongs_to :oa_cost_center, foreign_key: :cost_centerid

  def to_s
    name
  end

end

【讨论】：