def delete(self, request):
     courses = request.DATA.get('courses', '')
     course_ids = courses.split(',')
     user = request.user
     try:
         for course_id in course_ids:
             if course_id:
                 Follow.unfollow(user, 'course_meta.models.Course', course_id)
     except:
         transaction.rollback()
         raise error.Error(error.COURSES_FOLLOW_FAILED, u"课程取消关注失败")
     else:
         transaction.commit()
     return Response(status=status.HTTP_204_NO_CONTENT)
 def delete(self, request, course_id):
     user = request.user
     Follow.unfollow(user, 'course_meta.models.Course', course_id)
     return Response(status=status.HTTP_204_NO_CONTENT)