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from django.db.models import Count
from main.models import Todolist
def get_annotated_todolists(incomplete_only=False):
qs = Todolist.objects.all()
lists = qs.select_related('creator').defer(
'creator__email', 'creator__password', 'creator__is_staff',
'creator__is_active', 'creator__is_superuser',
'creator__last_login', 'creator__date_joined').annotate(
pkg_count=Count('todolistpkg')).order_by('-date_added')
incomplete = qs.filter(todolistpkg__complete=False).annotate(
Count('todolistpkg')).values_list('id', 'todolistpkg__count')
lookup = dict(incomplete)
if incomplete_only:
lists = lists.filter(id__in=lookup.keys())
# tag each list with an incomplete package count
for todolist in lists:
todolist.incomplete_count = lookup.get(todolist.id, 0)
return lists
# vim: set ts=4 sw=4 et:
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