Fix country/pk/databank N+1 query issue

Author: szabozoltan69

databank/models.py

@@ -351,7 +351,7 @@ def __str__(self):
 
     @property
     def appeals(self):
-        return Appeal.objects.filter(country=self.country).all()
+        return Appeal.objects.filter(country=self.country).select_related("dtype", "event")
 
     @property
     def past_crises_events_count(self):

databank/serializers.py

@@ -156,4 +156,4 @@ class Meta:
         fields = "__all__"
 
     def get_founded_date(self, object):
-        return Country.objects.filter(countryoverview=object).values_list("founded_date", flat=True).first()
+        return getattr(object.country, "founded_date", None)