1.验证数据的自定义类
class BooksDRFt(serializers.ModelSerializer):class Meta:model = Bookfields = '__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)
