Armadilha para descobrir deleção de registros

sigi/apps/espacos/apps.py

@@ -7,3 +7,8 @@ class EspacosConfig(AppConfig):
     name = "espacos"
     name = "sigi.apps.espacos"
     verbose_name = _("Agenda de espaços")
+
+    def ready(self):
+        from . import signals
+
+        return super().ready()

sigi/apps/espacos/signals.py

@@ -0,0 +1,22 @@
+import traceback
+from django.conf import settings
+from django.core.mail import send_mail
+from django.db.models.signals import pre_delete
+from django.dispatch import receiver
+from django.utils import timezone
+from sigi.apps.espacos.models import Reserva
+
+
+@receiver(pre_delete, sender=Reserva)
+def reserva_pre_delete(sender, **kwargs):
+    origin = kwargs.get("origin", None)
+    if origin and origin.count() == Reserva.objects.count():
+        stack_array = [f"At {timezone.localtime()} all records deleted:"]
+        stack_array.extend(traceback.format_stack())
+        send_mail(
+            subject="Armadilha deleção de reservas",
+            message="\n".join(stack_array),
+            from_email=settings.DEFAULT_FROM_EMAIL,
+            recipient_list=[email for name, email in settings.ADMINS],
+            fail_silently=True,
+        )