[bug 716645] Recalculate num_votes_past_week.

apps/questions/cron.py

@@ -6,7 +6,7 @@
 
 import cronjobs
 
-from questions.models import QuestionVote
+from questions.models import Question, QuestionVote
 from questions.tasks import update_question_vote_chunk
 from sumo.utils import chunked
 
@@ -15,13 +15,23 @@
 def update_weekly_votes():
     """Keep the num_votes_past_week value accurate."""
 
-    recent = datetime.now() - timedelta(days=14)
-
+    # Get all questions (id) with a vote in the last week.
+    recent = datetime.now() - timedelta(days=7)
     q = QuestionVote.objects.filter(created__gte=recent)
     q = q.values_list('question_id', flat=True).order_by('question')
     q = q.distinct()
+    q_with_recent_votes = list(q)
+
+    # Get all questions with num_votes_past_week > 0
+    q = Question.objects.filter(num_votes_past_week__gt=0)
+    q = q.values_list('id', flat=True)
+    q_with_nonzero_votes = list(q)
+
+    # Union.
+    qs_to_update = list(set(q_with_recent_votes + q_with_nonzero_votes))
 
-    for chunk in chunked(q, 50):
+    # Chunk them for tasks.
+    for chunk in chunked(qs_to_update, 50):
         update_question_vote_chunk.apply_async(args=[chunk])