gistfile1.coffee

  by_course: (token, cb) ->

    to_return = []
    Course
      .where('owner', token.username)
      .run (err, courses) ->
        processed = 0
        courses.forEach (course) ->
          Assignment
            .where('course_id', course._id)
            .run (err, assignments) ->
              to_return.push(course)
              processed += 1
              if processed is courses.length
                cb (to_return)