+ last = None, None
+ object_list = []
+ for l in Lesson.curriculum_courses.through.objects.all().order_by(
+ 'lesson__level', 'curriculumcourse'):
+ level, course = l.lesson.level, l.curriculumcourse
+ if (level, course) == last:
+ continue
+ if level != last[0]:
+ object_list.append((level, []))
+ object_list[-1][1].append(course)
+ last = (level, course)