Fixing average latlon function

django_lostplaces/lostplaces/models/place.py

@@ -1,6 +1,6 @@
 import os
 import datetime
-from math import round, ceil
+from math import ceil
 
 from django.db import models
 from django.urls import reverse
@@ -78,20 +78,20 @@ class Place(Submittable, Taggable, Mapable):
     # Get center position of LP-geocoordinates.
     def average_latlon(cls, place_list):
         amount = len(place_list)
-        # Init fill values to prevent None
-        # China Corner in Münster
-        # Where I almost always eat lunch
-        # (Does'nt help losing wheight, tho)
-        longitude = 7.6295628132604385
-        latitude = 51.961922091398904
 
         if amount > 0:
+            latitude = 0
+            longitude = 0
+
             for place in place_list:
                 longitude += place.longitude
                 latitude += place.latitude
-            return {'latitude':latitude / amount, 'longitude': longitude / amount}
-
-        return {'latitude': latitude, 'longitude': longitude}
+            return {'latitude': latitude / amount, 'longitude': longitude / amount}
+        else:
+            # Location of China Corner in Münster
+            # Where I almost always eat lunch
+            # (Does'nt help losing wheight, tho)
+            return {'latitude': 51.961922091398904, 'longitude': 7.6295628132604385}
 
     def calculate_place_level(self):
         if self.placevotings.count() == 0:
@@ -112,11 +112,14 @@ class Place(Submittable, Taggable, Mapable):
         accuaries = [];
 
         for vote in self.placevotings.all():
-            vote_age = timezone.now() - vote.created_when;
+            vote_age = timezone.now() - vote.submitted_when;
             accuracy = 100 - (100 / (place_age / vote_age))
             accuaries.append(accuracy)
         
-        return ceil(sum(accuaries) / len(accuaries))
+        if len(accuaries) > 0:
+            return ceil(sum(accuaries) / len(accuaries))
+        else:
+            return 0
 
     def __str__(self):
         return self.name
@@ -216,7 +219,7 @@ def auto_delete_file_on_change(sender, instance, **kwargs):
         old_file.delete(save=False)
 
 
-class PlaceVoting(PlaceAsset, Expireable):
+class PlaceVoting(PlaceAsset):
     vote = models.IntegerField(choices=PLACE_LEVELS)
     
     def get_human_readable_level(self):