def -- 反序列化字段校验通过的新增数据和修改数据

一.新增数据的create方法

1.serializers.py代码示例

from rest_framework import serializers
from student import models
class StudentSerializer(serializers.Serializer):
    name = serializers.CharField(max_length=8,required=True)
    age = serializers.IntegerField(max_value=120,required=True)
    sex = serializers.IntegerField(default=1)

    def validate_name(self,attr):
        if attr == "老王":
            raise serializers.ValidationError('隔壁老王不能进')
        return attr

    def validate(self, attrs):
        if attrs.get('name') == "张三" and attrs.get('age') == 26:
            raise serializers.ValidationError('26岁的张三不能进')
        return attrs

    def create(self, validated_data):
        stu_data = models.Student.objects.create(**validated_data)
        return stu_data

2.views.py代码示例：

from django.views import View
from django.http import HttpResponse
from unsers.serializers import StudentSerializer
from student import models
import json
# Create your views here.
class StudentView(View):

    def post(self,request):
        data = json.loads(request.body)
        #将序列化的数据传入定义的反序列化类中，用data参数接收
        serializers = StudentSerializer(data=data)
        serializers.is_valid(raise_exception=True) #raise_exception=True该参数可以在校验失败时，直接报错
        serializers.save() #在校验通过时，会直接执行StudentSerializer类中的create方法
        return HttpResponse('ok')

2.修改数据的update方法：

serializers.py代码示例：

from rest_framework import serializers
from student import models
class StudentSerializer(serializers.Serializer):
    name = serializers.CharField(max_length=8,required=True)
    age = serializers.IntegerField(max_value=120,required=True)
    sex = serializers.IntegerField(default=1)

    def validate_name(self,attr):
        if attr == "老王":
            raise serializers.ValidationError('隔壁老王不能进')
        return attr

    def validate(self, attrs):
        if attrs.get('name') == "张三" and attrs.get('age') == 26:
            raise serializers.ValidationError('26岁的张三不能进')
        return attrs

    def create(self, validated_data):
        stu_data = models.Student.objects.create(**validated_data)
        return stu_data

    def update(self, instance, validated_data):
        #利用反射，将获取的数据，进行更新
        for key, value in validated_data.items():
            setattr(instance, key, value)
        #或者每个字段单独的更新
        # instance.name = validated_data.get('name')
        # instance.age = validated_data.get('age')
        # instance.sex = validated_data.get('sex')
        instance.save()
        #保存后，将对象返回
        return instance

views.py代码示例：

from django.views import View
from django.http import HttpResponse
from unsers.serializers import StudentSerializer
from student import models
import json
# Create your views here.
class StudentView(View):

    def post(self,request):
        data = json.loads(request.body)
        #将序列化的数据传入定义的反序列化类中，用data参数接收
        serializers = StudentSerializer(data=data)
        serializers.is_valid(raise_exception=True) #raise_exception=True该参数可以在校验失败时，直接报错
        serializers.save() #在校验通过时，会直接执行StudentSerializer类中的create方法
        return HttpResponse('ok')

    def put(self,request):
        data = json.loads(request.body)
        id = data.get('id')
        stu_obj = models.Student.objects.get(id=id)
        serializers=StudentSerializer(instance=stu_obj,data=data)
        serializers.is_valid(raise_exception=True)
        serializers.save() #在校验通过时，会直接执行StudentSerializer类中的update方法
        return HttpResponse('ok')

标签：serializers,--,StudentSerializer,return,import,序列化,data,def
来源： https://www.cnblogs.com/zhiqianggege/p/16218877.html