def delete(self,student_id):
     validator = Validator(student_id,'delete',StudentHandler.valid_model)
     student = Student.get_by_id(int(student_id))
     if student:
         student.key.delete()
         self.response.write(json.dumps(validator.success_message()))
     else:
         self.response.write(json.dumps(validator.error_message()))
 def delete(self,course_id):
     validator = Validator(course_id,'delete',CourseHandler.valid_model)
     course = Course.get_by_id(int(course_id))
     if course:
         course.key.delete()
         self.response.write(json.dumps(validator.success_message()))
     else:
         self.response.write(json.dumps(validator.error_message()))
 def delete(self, grade_id):
     validator = Validator(grade_id, "delete", GradeHandler.valid_model)
     grade = Grade.get_by_id(int(grade_id))
     if grade:
         grade.key.delete()
         self.response.write(json.dumps(validator.success_message()))
     else:
         self.response.write(json.dumps(validator.error_message()))