port to new django, AI automated

eventplanner/snippets.py

@@ -1,50 +1,58 @@
 from datetime import datetime
-from .models import Event, EventParticipation, NoNextEventException
+
 from musicians.models import Musician
 
+from .models import Event, EventParticipation, NoNextEventException
+
 
 def addEventCountdownForNextEventToContext(context, username, eventType=""):
-    """Returns an object that has to be added to the render context on the page where the countdown 
-       should be displayed . The username is required to also supply participation information."""
+    """Returns an object that has to be added to the render context on the page where the countdown
+    should be displayed. The username is required to also supply participation information."""
 
     try:
         nextEvent = Event.getNextEvent(eventType, False)
     except NoNextEventException:
         return
 
-    countdown = dict()
+    countdown = {}
 
     if EventParticipation.isMember(username):
         part = EventParticipation.objects.filter(user=username).filter(event=nextEvent)
-        countdown['participation'] = part[0].status
+        if part.exists():
+            countdown["participation"] = part[0].status
 
     eventTime = nextEvent.displaydatetime
-    countdown['event'] = nextEvent
-    countdown['epoch'] = int((eventTime - datetime.now()).total_seconds() * 1000)
+    countdown["event"] = nextEvent
+    countdown["epoch"] = int((eventTime - datetime.now()).total_seconds() * 1000)
 
     context["countdown"] = countdown
 
 
 def addEventRouteForNextEventToContext(context, username, eventType=""):
-    """Returns an object that has to be added to the render context on the page where the route 
-       should be displayed . The starting address of the route will be the home of the specified user"""
+    """Returns an object that has to be added to the render context on the page where the route
+    should be displayed. The starting address of the route will be the home of the specified user"""
 
     try:
         nextEvent = Event.getNextEvent(eventType, True)
     except NoNextEventException:
         return
 
-    routeInfo = dict()
+    routeInfo = {}
 
-    routeInfo['event'] = nextEvent
+    routeInfo["event"] = nextEvent
 
-    musician = Musician.objects.get(user=username);
-    routeInfo['origin'] = musician.street + ", " + str(musician.zip_code) + " " + musician.city
+    try:
+        musician = Musician.objects.get(user=username)
+        routeInfo["origin"] = (
+            musician.street + ", " + str(musician.zip_code) + " " + musician.city
+        )
+    except Musician.DoesNotExist:
+        routeInfo["origin"] = ""
 
     if nextEvent.map_location:
-        # map_location has format "lat,longitute,zoomlevel"
-        routeInfo['destination'] = ",".join(nextEvent.map_location.split(",")[:2])
+        # map_location has format "lat,longitude,zoomlevel"
+        routeInfo["destination"] = ",".join(nextEvent.map_location.split(",")[:2])
     else:
-        routeInfo['destination'] = nextEvent.location
+        routeInfo["destination"] = nextEvent.location
 
     context["route"] = routeInfo