On déplace l'annotation

kfet/views.py

@@ -2473,18 +2473,16 @@ class SalesStatList(BaseListView):
             super()
             .get_queryset()
             .filter(type=Operation.PURCHASE, canceled_at=None, article__isnull=False)
+            .values_list("article__name")
+            .annotate(Sum("article_nb"))
         )
 
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
         scale = MonthScale(n_steps=self.kwargs.get("n_months", 12), last=True)
-        qs = self.get_queryset()
         articles = list(Article.objects.order_by("name"))
         indexes = {a.name: index for index, a in enumerate(articles)}
-        ventes = scale.chunkify_qs(
-            qs.values_list("article__name").annotate(Sum("article_nb")),
-            field="group__at",
-        )
+        ventes = scale.chunkify_qs(self.get_queryset(), field="group__at")
 
         ctx["header"] = ["Mois"] + [a.name for a in articles]
         ctx["ventes"] = []