django rest_framework 错误信息 AssertionError: When a serializer is passed a `data` keyword
今天在学习django 的rest_framework规范时,遇到了 AssertionError: When a serializer is passed a `data` keyword argument you must call `.is_valid()` before attempting to access the serialized `.data` representation. 错误信息。记录一下解决方法。
错误代码:
class BookModelSerializer(serializers.ModelSerializer):
class Meta:
model = Books
fields = "__all__"
class BooksView(APIView):
def get(self, request):
book_list = Books.objects.all()
ret = BookModelSerializer(book_list, many=True)
return Response(ret.data)
def post(self, request):
print(request.data)
bs = BookModelSerializer(data=request.data)
print(bs.data)
if bs.is_valid():
return Response(bs.data)
else:
return Response(bs.errors)
错误原因:
首先在将序列化的数据反序列化成对象时,要在序列化类的参数中指明data=序列化的数据
在调用对象.data时,要先执行.is_valid()方法后,才能调用
所以修改成下面这样就不报错了
class BookModelSerializer(serializers.ModelSerializer):
class Meta:
model = Books
fields = "__all__"
class BooksView(APIView):
def get(self, request):
book_list = Books.objects.all()
ret = BookModelSerializer(book_list, many=True)
return Response(ret.data)
def post(self, request):
print(request.data)
bs = BookModelSerializer(data=request.data)
if bs.is_valid():
print(bs.data)
return Response(bs.data)
else:
return Response(bs.errors)