So I have some code below that returns posts that are newer than a post with post_uuid given. This is ensured because I force an ordered uuid scheme where each Post is given a uuid in order of creation, this is done with ulid. I want to enforce that that the returned serializer.data is ordered by Post creation data, with the newest best first or index=0 and oldest being last. How do I ensure this?
view.py
def query_to_full_post_data_serializer(request, post_query_set: QuerySet):
query_set_annotated = post_query_set.annotate(
creator_username=F('creator__username'),
creator_avatar_url=F('creator__avatar')
)
return FullPostDataSerializer(query_set_annotated, many=True)
@api_view(['GET'])
def get_newer_posts(request, post_uuid, count):
query = generate_followee_or_join_goal_follow_query(request)
query = query & Q(uuid__gt=post_uuid)
serializer = query_to_full_post_data_serializer(request=request, post_query_set=Post.objects.filter(query).order_by('uuid')[:count])
return Response(serializer.data, status=status.HTTP_200_OK)
serializer.py
class FullPostDataSerializer(serializers.ModelSerializer):
creator_username = serializers.SlugField()
creator_avatar_url = serializers.SlugField()
class Meta:
model = Post
fields = (
'body', 'created', 'creator_username', 'uuid', 'creator', 'creator_avatar_url')
Tried Solutions
-
serializer.data.reverse()
doesn't reverse the list for some reason.
order_by on the slice, but this isn't allowed by DjangoThe serializer.data is a property, so calling .reverse() on it, will not work, since you reverse the result of the property, but the next call to serializer.data will again trigger to property that will construct a new list.
You thus fetch the data, and then reverse that data and pass it as result:
items = serializer.data
items.reverse()
return Response(items, status=status.HTTP_200_OK)