将模型对象转换为json字典：model_to_dict

例子

from rest_framework.views import APIView

class StudentAPIView(APIView):
  def get(self, request):
    pk = request.query_params.get(pk)
    student_obj = Student.objects.get(pk)
    return Response(model_to_dict(student_obj))

# model_to_dict中的参数
model_to_dict(模型对象, fields(指定返回的字段), exclude(排除返回的字段))