Inventory deletion view

kfet/views.py

@@ -13,7 +13,7 @@ from django.contrib.auth.models import Permission, User
 from django.contrib.messages.views import SuccessMessageMixin
 from django.core.exceptions import SuspiciousOperation
 from django.db import transaction
-from django.db.models import Count, F, Prefetch, Q, Sum
+from django.db.models import Count, F, Max, OuterRef, Prefetch, Q, Subquery, Sum
 from django.forms import formset_factory
 from django.http import Http404, HttpResponseBadRequest, JsonResponse
 from django.shortcuts import get_object_or_404, redirect, render
@@ -1909,6 +1909,32 @@ class InventoryRead(DetailView):
         return context
 
 
+class InventoryDelete(PermissionRequiredMixin, DeleteView):
+    model = Inventory
+    success_url = reverse_lazy("kfet.inventory")
+    success_message = "Inventaire annulé avec succès !"
+    permission_required = "kfet.delete_inventory"
+
+    def get(self, request, *args, **kwargs):
+        return redirect("kfet.inventory.read", self.kwargs.get(self.pk_url_kwarg))
+
+    def delete(self, request, *args, **kwargs):
+        inv = self.get_object()
+        # On met à jour les articles dont c'est le dernier inventaire
+        # .get() ne marche pas avec OuterRef, donc on utilise .filter() avec [:1]
+        update_subquery = InventoryArticle.objects.filter(
+            inventory=inv, article=OuterRef("pk")
+        ).values("stock_old")[:1]
+
+        Article.objects.annotate(last_env=Max("inventories__at")).filter(
+            last_env=inv.at
+        ).update(stock=Subquery(update_subquery))
+
+        # On a tout mis à jour, on peut delete (avec un message)
+        messages.success(request, self.success_message)
+        return super().delete(request, *args, **kwargs)
+
+
 # -----
 # Order views
 # -----