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)