Added DoesNotExist handling.

Author: dmytrotsko

src/signals/filters.py

@@ -1,4 +1,5 @@
 from typing import Any
+import logging
 
 import django_filters
 from django.db.models import Q
@@ -20,6 +21,9 @@
 )
 
 
+logger = logging.getLogger(__name__)
+
+
 class NumberInFilter(BaseInFilter, NumberFilter):
     pass
 
@@ -50,7 +54,10 @@ class SignalFilter(django_filters.FilterSet):
 
     def __init__(self, data, *args, **kwargs):
         data = data.copy()
-        data.setdefault('geographic_scope', GeographicScope.objects.get(name='USA').id)
+        try:
+            data.setdefault('geographic_scope', GeographicScope.objects.get(name='USA').id)
+        except GeographicScope.DoesNotExist:
+            logger.warning("Default Geographic Scope was not found in the database. Using an empty list.")
         super().__init__(data, *args, **kwargs)
 
     class Meta:

src/signals/views.py

@@ -1,4 +1,5 @@
 from typing import Any, Dict
+import logging
 
 from django.conf import settings
 from django.views.generic import DetailView, ListView
@@ -12,6 +13,9 @@
 from signals.serializers import SignalSerializer
 
 
+logger = logging.getLogger(__name__)
+
+
 class SignalsListView(ListView):
     """
     ListView for displaying a list of Signal objects.
@@ -76,7 +80,12 @@ def get_context_data(self, **kwargs) -> Dict[str, Any]:
         context: Dict[str, Any] = super().get_context_data(**kwargs)
         url_params_dict, url_params_str = self.get_url_params()
         if not url_params_dict.get("geographic_scope"):
-            url_params_dict["geographic_scope"] = [GeographicScope.objects.get(name="USA").id]
+            default_geographic_scope = []
+            try:
+                default_geographic_scope = [GeographicScope.objects.get(name="USA").id]
+            except GeographicScope.DoesNotExist:
+                logger.warning("Default Geographic Scope was not found in the database. Using an empty list.")
+            url_params_dict["geographic_scope"] = default_geographic_scope
         context["url_params_dict"] = url_params_dict
         context["form"] = SignalFilterForm(initial=url_params_dict)
         context["url_params_str"] = url_params_str