feat: убираем денормализацию (антипреждевременная оптимизация)

src/usecase/subscription/handle_unsubscription.py

@@ -34,19 +34,13 @@ async def handle_unsubscription(self: 'Usecase', user_telegram_id: int, channel_
         return
 
     for subscription in subscriptions:
-        async with self.database.transaction():
-            subscription.status = domain.SubscriptionStatus.UNSUBSCRIBED
-            subscription.unsubscribed_at = timezone.now()
-            await self.database.update_subscription(subscription)
+        subscription.status = domain.SubscriptionStatus.UNSUBSCRIBED
+        subscription.unsubscribed_at = timezone.now()
+        await self.database.update_subscription(subscription)
 
-            placement = subscription.placement
-            if placement.subscriptions_count > 0:
-                placement.subscriptions_count -= 1
-                await self.database.update_placement(placement)
-
-    log.info(
-        'Subscription marked as unsubscribed: subscriber %s (telegram_id: %s) unsubscribed from placement %s',
-        subscriber.id,
-        user_telegram_id,
-        placement.id,
-    )
+        log.info(
+            'Subscription marked as unsubscribed: subscriber %s (telegram_id: %s) unsubscribed from placement %s',
+            subscriber.id,
+            user_telegram_id,
+            subscription.placement_id,
+        )