Collection revision: implement iteration.

This commit is contained in:
Tom Hacohen 2020-06-23 18:25:23 +03:00
parent 786948c456
commit 7183b97541

View File

@ -271,15 +271,30 @@ class CollectionItemViewSet(BaseViewSet):
@action_decorator(detail=True, methods=['GET'])
def revision(self, request, collection_uid=None, uid=None):
# FIXME: need pagination support
col = get_object_or_404(self.get_collection_queryset(Collection.objects), main_item__uid=collection_uid)
col_it = get_object_or_404(col.items, uid=uid)
item = get_object_or_404(col.items, uid=uid)
limit = int(request.GET.get('limit', 50))
iterator = request.GET.get('iterator', None)
queryset = item.revisions.exclude(current=True).order_by('-id')
if iterator is not None:
iterator = get_object_or_404(queryset, uid=iterator)
queryset = queryset.filter(id__lt=iterator.id)
queryset = queryset[:limit]
serializer = CollectionItemRevisionSerializer(queryset, many=True)
# This is not the most efficient way of implementing this, but it's good enough
done = len(queryset) < limit
last_item = len(queryset) > 0 and serializer.data[-1]
revisions = col_it.revisions.exclude(current=True).order_by('-id')
serializer = CollectionItemRevisionSerializer(revisions, many=True)
ret = {
'data': serializer.data,
'done': True, # we always return all the items, so it's always done
'iterator': last_item and last_item['uid'],
'done': done,
}
return Response(ret)