don't import model before apps ready

timer/consumers.py

@@ -8,8 +8,6 @@ from timeit import default_timer
 from asgiref.sync import sync_to_async
 from channels.generic.websocket import AsyncWebsocketConsumer
 
-from .models import OngoingTimer
-
 running_timer_threads = []
 
 
@@ -71,6 +69,8 @@ def tick_timer(timer, iteration: int, total_seconds: int) -> None:
 
 class TimerConsumer(AsyncWebsocketConsumer):
     async def connect(self) -> None:
+        from .models import OngoingTimer
+
         timer_id = self.scope["url_route"]["kwargs"]["id"]
         timer = await sync_to_async(OngoingTimer.objects.filter(id=timer_id).first)()