如何将“rails 2 + mongo_mapper”代码转换为“rails 3 + mongoid”代码？特别是“set_collection_name”函数？

Question

这里列出了代码：

它是在“rails 2 + mongo_mapper”环境中编码的，现在我想将它转换为“rails 3 + mongoid”。没有报告“set_collection_name”的方法名称。

def klass
  @klass ||= user_klass
end

def user_klass
  klass ||= Class.new
  klass.send(:include, Mongoid::Document)
  // is it correct for mongoid
  klass.set_collection_name(self._id.to_s)
  klass.field "created_at", DateTime
  klass.class_eval <<-METHOD
    def id
      self._id.to_s
    end

    def persisted?
      !new_record?
    end
  METHOD

  klass.instance_eval <<-NAME
    def name
      'Row'
    end
  NAME

  self.questions.each do |question|
    klass.field "q#{question.id}", String
    klass.validates_presence_of "q#{question.id}".to_sym, :message => I18n.t('activemodel.errors.messages.blank') if question.required
    klass.validates_uniqueness_of "q#{question.id}".to_sym, :message => I18n.t('activemodel.errors.messages.taken') if question.unique

      if question.input == 'check' || question.input == 'radio'
        klass.class_eval <<-METHOD
        alias_method :old_q#{question.id}=, :q#{question.id}=
        def q#{question.id}=(choices)
          if !choices.is_a?(Array)
            self.old_q#{question.id}= choices
            return
          end

          if choices.include?('_other')
            choices.delete('_other')
            other_options = choices.detect {|c| c.is_a?(Hash)}
            choices << other_options['other']
          end

          choices.reject! {|c| c.is_a?(Hash) || c.blank?}
          self.old_q#{question.id}= choices.join("\n")
        end
      METHOD
    end
  end
  klass
end

函数“send”和“set_collection_name”是否适用于 rails 3 和 mongoid 环境。内部类。

Answer 1

我相信你正在寻找store_in :posts 或类似的东西。

http://mongoid.org/docs/documents.html

  # Macro for setting the collection name to store in.
  #
  # @example Store in a separate collection than the default.
  #   Model.store_in :population
  #
  # @example Store in a capped collection.
  #   Model.store_in :population, :capped => true, :max => 10000
  #
  # @param [ Symbol ] name The name of the collection.
  # @param [ Hash ] options The collection options.
  #
  # @option options [ true, false ] :capped If the collection is capped.
  # @option options [ Integer ] :size The capped collection size.
  # @option options [ Integer ] :max The maximum number of docs in the
  #   capped collection.
  def store_in(name, options = {})
    self.collection_name = name.to_s
    set_collection(options)
  end