serializer中的验证器

Posted 2023-04-18

参考技术A class ExpertCreateSerializer(serializers.ModelSerializer):
createTime = serializers.HiddenField(default=datetime.now)
createUser = serializers.HiddenField(default=serializers.CurrentUserDefault())

DRF数据验证+数据存储

1.验证数据的自定义类

class BooksDRFt(serializers.ModelSerializer):
    class Meta:
        model = Book
        fields = ‘__all__‘
    #要验证的字段
    author = serializers.CharField(required=False)
    #要验证的字段
    name = serializers.CharField(min_length=2, error_messages{‘required‘: ‘不能为空‘, ‘min_length‘: ‘最短长度是二‘})
    
    #局部钩子
    def validate_name(self,value):
        response = {‘status‘:100,‘msg‘:‘成功‘}
        res = models.Book.objects.filter(name=value)
        if res:
            raise exceptions.ValidationError(‘书名重复!‘)

        else:
            return value
    #全局钩子
    def validate(self, attrs):
        name = attrs.get(‘name‘)
        price = attrs.get(‘price‘)
        if str(name) == str(int(price)):
            raise exceptions.ValidationError(‘重复!‘)
        else:
            return attrs

? 注意:1 必须继承ModelSerializer

? 2.在视图函数中的使用

? 1 验证+存储数据

class Books(APIView):
    def post(self,request):
        book_res = common.BooksDRFt(data=request.data)
        if book_res.is_valid():
            book_res.save()
            return JsonResponse(book_res.data,safe=False)
        else:
            return JsonResponse(book_res.errors)

? 2 验证+修改数据

class BooksUpdateCreate(APIView):
    def put(self,request,id):
        book = models.Book.objects.filter(id=id).first()
        book_res = common.BooksDRFt(data=request.data,instance=book)
        if book_res.is_valid():
            book_res.save()
            return JsonResponse(book_res.data,safe=False)
        else:
            return JsonResponse(book_res.errors)