ruby on rails - Model association that spans across parent app and engine -

i'm making rails engine makes reference current_user in controller so:

require_dependency "lesson_notes/application_controller"  module lessonnotes   class notescontroller < applicationcontroller      def index       if current_user         @notes = note.where(student: current_user) if current_user.user_type.name == "student"         @notes = note.where(teacher: current_user) if current_user.user_type.name == "teacher"       end     end    end end 

this quite verbose , seem instead:

require_dependency "lesson_notes/application_controller"  module lessonnotes   class notescontroller < applicationcontroller      def index       @notes = current_user.notes if current_user     end    end end 

however, the user model exists in parent app, not engine.

in note model have define belongs_to association:

module lessonnotes   class note < activerecord::base     belongs_to :student, class_name: "::user"     belongs_to :teacher, class_name: "::user"   end end 

how define other side of association - has_many - in user model?

this how ended doing it...

in parent app:

class user < activerecord::base    has_many   :notes, class_name: lessonnotes::engine::note, foreign_key: "teacher_id"  end