在前后端分离开发中，对于RESTfulAPI设置，一般需要将查询/更新数据以JSON方式进行返回。

序列化

Model.py

from django.db import models
class User(models.Model):
    username = models.CharField(verbose_name='用户名',max_length=10)
    age = models.IntegerField(verbose_name='年龄')
    email = models.CharField(verbose_name='邮箱',max_length=20)

View.py

from api.models import User
from  api.models import userSerializer
class userView(APIView):
    def get(self,request):
        queryset = User.objects.all()
        # 序列化
        res = userSerializer(instance=queryset, many=True)
        return Response({'code':200,'msg':'ok','data':res.data})

Url.py

from . import views
from django.urls import path

urlpatterns = [
    path("user/",views.userView.as_view())
]

1.序列化器类(Serializer)

from rest_framework import serializers
class userSerializer(serializers.Serializer):
     username = serializers.CharField()
     age = serializers.CharField()
     email = serializers.CharField()

2.序列化器类(ModelSerializer)

from rest_framework import serializers
class userSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = '__all__'

postman测试get方法

反序列化

DRF序列化器可以将来自客户端的请求数据（通常是JSON数据）转换为Python对象，以便在视图中进行处理。

from api.models import User
from  api.models import userSerializer
class userView(APIView):

    def post(self,request):
        # 反序列化
        serializer = userSerializer(data=request.query_params)
        # 如果验证成功
        if serializer.is_valid():
            serializer.save()
            return Response({'code': 200, 'msg': 'ok'})
        else:
            return Response({'code': 201, 'msg': 'error'})

postman测试post方法