python – Django REST框架：“此字段是必需的.”with required = False和unique_together

概述我想用Django REST Framework保存一个简单的模型.唯一的要求是在perform_create()方法中自动设置UserVote.created_by.这个例外失败了： { "created_by": [ "This field is required." ]} 我想这是因为unique_together索引. models.py： class U 我想用Django REST Framework保存一个简单的模型.唯一的要求是在perform_create()方法中自动设置UserVote.created_by.这个例外失败了：

{    "created_by": [        "This fIEld is required."    ]}

我想这是因为unique_together索引.

models.py：

class UserVote(models.Model):    created_by = models.ForeignKey(User,related_name='userVotes')    rating = models.ForeignKey(rating)    class Meta:        unique_together = ('created_by','rating')

serializers.py

class UserVoteSerializer(serializers.ModelSerializer):    ID = serializers.IntegerFIEld(read_only=True)    created_by = UserSerializer(read_only=True)    class Meta:        model = UserVote        fIElds = ('ID','rating','created_by')

vIEws.py

class UserVoteVIEwSet(vIEwsets.ModelVIEwSet):    queryset = UserVote.objects.all()    serializer_class = UserVoteSerializer    permission_classes = (IsCreatedByOrReadonly,)    def perform_create(self,serializer):        serializer.save(created_by=self.request.user)

如何在不让用户提供created_by的情况下将模型保存在DRF中,而是在代码中自动设置此字段？

提前致谢！

解决方法 我有类似的问题,我通过显式创建并将新实例传递给序列化程序来解决它.在UserVoteVIEwSet中,您必须将perform_create替换为create：

def create(self,request,*args,**kwargs):    uv = UserVote(created_by=self.request.user)    serializer = self.serializer_class(uv,data=request.data)    if serializer.is_valID():        serializer.save()        return Response(serializer.data,status=status.http_201_CREATED)    else:        return Response(serializer.errors,status=status.http_400_BAD_REQUEST)

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