How Im trying to do.rb

def factories(*models)
  models.each do |model|
    (class << self; self; end).class_eval <<-METHOD
      def factory_#{model}
        @#{model} ||= Factory(:#{model})
      end
    METHOD

    self.class_eval <<-METHOD
      def factory_#{model}
        proc { factory_#{model} }
      end
    METHOD
  end
end

What I manually coded.rb

  # asset factory
  def self.factory_asset
    proc { factory_asset }
  end
  
  def factory_asset
    @asset ||= Factory(:asset)
  end

  # project factory
  def self.factory_project
    proc { factory_project }
  end
  
  def factory_project
    @project ||= Factory(:project)
  end

What I want.rb

factories :asset, :project