nearest event recommendation fix

functions/model_mixin.py

@@ -127,12 +127,12 @@ class EventMixin(object):
         events_m = []
         events = []
         for params in [{'tag__in': tags}, {'theme__in': themes}]:
-            qs = _qs.filter(**params).order_by('data_begin')
-            events_m2.extend(qs.filter(data_begin__gte=month2).exclude(pk__in=exclude_pks)[:3])
+            qs = _qs.filter(**params).order_by('data_begin').distinct()
+            events_m2.extend(list(qs.filter(data_begin__gte=month2).exclude(pk__in=exclude_pks)[:3]))
             exclude_pks.update([x.pk for x in events_m2])
-            events_m.extend(qs.filter(data_begin__gte=month).exclude(pk__in=exclude_pks)[:3])
+            events_m.extend(list(qs.filter(data_begin__gte=month).exclude(pk__in=exclude_pks)[:3]))
             exclude_pks.update([x.pk for x in events_m])
-            events.extend(qs.filter(data_begin__gte=now).exclude(pk__in=exclude_pks)[:3])
+            events.extend(list(qs.filter(data_begin__gte=now).exclude(pk__in=exclude_pks)[:3]))
             exclude_pks.update([x.pk for x in events])
         return (list(
             sorted(list(chain(*zip(*[x for x in [events_m2, events_m, events] if x])))[:3], key=lambda x: x.data_begin)),
@@ -142,8 +142,8 @@ class EventMixin(object):
         if getattr(self, '_nearest_events', None) is None:
             model = self.__class__
             result = []
-            tags = self.tag.all().values_list('pk', flat=True)
-            themes = self.theme.all().values_list('pk', flat=True)
+            tags = list(self.tag.all().values_list('pk', flat=True))
+            themes = list(self.theme.all().values_list('pk', flat=True))
             qs = model.objects.language().filter(country_id=self.country_id)
             result, exclude = self.get_nearest_events_incl(qs, tags, themes)
             if len(result) > 3: