fix

aggregator/models.py

@@ -48,6 +48,8 @@ class Chat(models.Model):
                         obj.photo.save(os.path.basename(path), f, save=True)
                 obj.photo_id = chat.photo.small_file_id
                 obj.save()
+        if created:
+            transaction.on_commit(lambda: collect_new_messages.delay(obj.pk))
         return obj
 
     def __str__(self):

aggregator/signals.py

@@ -2,7 +2,6 @@ from pyrogram import Error
 
 from .client import get_client
 from .models import Chat, AggregationSource
-from .tasks import collect_new_messages
 
 
 def aggregation_source_deleted(sender, instance: AggregationSource, **kwargs):
@@ -10,11 +9,6 @@ def aggregation_source_deleted(sender, instance: AggregationSource, **kwargs):
         Chat.objects.filter(chat_id=instance.chat_id).delete()
 
 
-def chat_created(sender, instance: Chat, created, **kwargs):
-    if created:
-        collect_new_messages.delay(instance.pk)
-
-
 def chat_deleted(sender, instance: Chat, **kwargs):
     with get_client() as client:
         try: