Good idea?

editor.rb

class Editor < ActiveRecord::Base
  belongs_to :user

  def do_editor_stuff;end
end

imperative_controller.rb

writer = User.find(123)
writer.do_writer_stuff() if writer.is_writer?

editor = User.find(456)
editor.do_editor_stuff() if editor.is_editor?

user.rb

class User < ActiveRecord::Base
  has_one :writer
  has_one :editor
  delegate :do_writer_stuff, :writer
  delegate :do_editor_stuff, :editor

  def is_writer?
    self.writer.present?
  end

  def is_editor?
    self.editor.present?
  end
end

writer.rb

class Writer < ActiveRecord::Base
  belongs_to :user

  def do_writer_stuff;end
end