Create or Update (with PUT) in Django Rest Framewo

问题:

I have a model which has has an primary key id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False).

When a PUT request is sent to the resource's endpoint /api/v1/resource/<id>.json I would like to create a new resource with the supplied id if the resource does not already exist.

Note: I'm using a ModelViewSet with a ModelSerializer

What is the most elegant way of doing this?

回答1:

I ended up overriding the get_object() method in my ModelViewSet:

class ResourceViewSet(viewsets.ModelViewSet):
    """
    This endpoint provides `create`, `retrieve`, `update` and `destroy` actions.
    """
    queryset = Resource.objects.all()
    serializer_class = ResourceSerializer

    def get_object(self):
        if self.request.method == 'PUT':
            resource = Resource.objects.filter(id=self.kwargs.get('pk')).first()
            if resource:
                return resource
            else:
                return Resource(id=self.kwargs.get('pk'))
        else:
            return super(ResourceViewSet, self).get_object()

Perhaps there's a more elegant way of doing this?