DRF使用Serializer来进行序列化和反序列化操作

1. serializer.py中的代码

   from rest_framework import serializers
   from .models import *
   
   class UserSerializers(serializers.Serializer):
       
       username = serializers.CharField(max_length=64)
       
       age = serializers.IntegerField(allow_null=True)
       
       home = serializers.CharField(max_length=64)
       
       def create(self, validated_data):
           
           return User.object.create(**validated_data)
       
       def update(self, instance, validated_data):
           # instance 数据库里的模型
           # validated_data 传进来要修改的数据
           
           instance.username = validated_data.get('username', instance.username)
           
           instance.age = validated_data.get('age', instance.age)
           
           instance.home = validated_data.get('home', instance.home)
           
           instance.save()
           return instance
   

2. views.py中的代码

   # 用户接口
   class UserView(APIView):
       
       # 查看
       def get(self, request):
       
           users = User.objects.all()
   
           ser = UserSerializer(users, many=True)
   
           data = ser.data
   
           return Response(data)
   	# 添加
       def post(self, request):
           
           data = request.data
           
           ser = UserSerializer(data=data)
           
           if ser.is_valid():
               
               ser.save()
               
               return Response({'msg': '添加成功', 'code': 200})
           else:
               print(ser.errors)
   	# 修改
       def put(self, request):
           
           data = request.data
           
           user = User.objects.get(id=1)
           
           ser = UserSerializer(user, data=data)
           
           if ser.is_valid():
               
               ser.save()
               
               return Response({'msg': '修改成功', 'code': 200})
           else:
               print(ser.errors)
               
   	# 删除
       def delete(self, request):
           
           uid = request.data.get('id')
           
           user = User.objects.filter(pk=uid).first()
           
           if user:
               user.delete()
               return Response({'msg': '删除成功', 'code': 200})
           else:
               print(user.errors)