added an endpoint that return an array of country calling codes /api/back/location/countries/calling-codes/

apps/establishment/serializers/back.py

@@ -133,7 +133,7 @@ class EstablishmentListCreateSerializer(model_serializers.EstablishmentBaseSeria
             emails_list = validated_data.pop('contact_emails')
 
         index_name = validated_data.get('index_name')
-        if 'slug' in validated_data and index_name:
+        if 'slug' not in validated_data and index_name:
             slug = slugify(
                 index_name,
                 word_boundary=True
@@ -143,6 +143,7 @@ class EstablishmentListCreateSerializer(model_serializers.EstablishmentBaseSeria
                     f'{index_name} {string_random()}',
                     word_boundary=True
                 )
+            validated_data['slug'] = slug
 
         instance = super().create(validated_data)
         phones_handler(phones_list, instance)

apps/location/models.py

@@ -23,6 +23,22 @@ class CountryQuerySet(models.QuerySet):
         """Filter only active users."""
         return self.filter(is_active=switcher)
 
+    def by_country_code(self, code: str):
+        """Filter QuerySet by country code."""
+        return self.filter(code__iexact=code)
+
+    def aggregate_country_codes(self):
+        """Aggregate country codes."""
+        calling_codes = list(
+            self.model.objects.exclude(calling_code__isnull=True)
+                              .exclude(code__iexact='aa')
+                              .distinct()
+                              .values_list('calling_code', flat=True)
+        )
+        # extend country calling code hardcoded codes
+        calling_codes.extend(settings.CALLING_CODES_ANTILLES_GUYANE_WEST_INDIES)
+        return [self.model.CALLING_NUMBER_MASK % i for i in calling_codes]
+
 
 class Country(TranslatedFieldsMixin,
               SVGImageMixin, ProjectBaseMixin):

apps/location/urls/back.py

@@ -14,6 +14,8 @@ urlpatterns = [
     path('cities/<int:pk>/', views.CityRUDView.as_view(), name='city-retrieve'),
 
     path('countries/', views.CountryListCreateView.as_view(), name='country-list-create'),
+    path('countries/calling-codes/', views.CountryCallingCodeListView.as_view(),
+         name='country-calling-code-list'),
     path('countries/<int:pk>/', views.CountryRUDView.as_view(), name='country-retrieve'),
 
     path('regions/', views.RegionListCreateView.as_view(), name='region-list-create'),

apps/location/views/back.py

@@ -1,6 +1,7 @@
 """Location app views."""
 from django.contrib.postgres.fields.jsonb import KeyTextTransform
-from rest_framework import generics
+from rest_framework import generics, status
+from rest_framework.response import Response
 
 from location import filters
 from location import models, serializers
@@ -107,26 +108,64 @@ class RegionRUDView(common.RegionViewMixin, generics.RetrieveUpdateDestroyAPIVie
 
 
 # Country
-class CountryListCreateView(generics.ListCreateAPIView):
+class CountryBaseViewMixin:
+    """Mixin for Country views."""
+    queryset = models.Country.objects.all()
+    permission_classes = get_permission_classes(
+        IsEstablishmentManager,
+        IsEstablishmentAdministrator,
+        IsGuest,
+    )
+
+
+class CountryListCreateView(CountryBaseViewMixin, generics.ListCreateAPIView):
     """List/Create view for model Country."""
-    queryset = models.Country.objects.all()\
-        .annotate(locale_name=KeyTextTransform(get_current_locale(), 'name'))\
-        .order_by('locale_name')
+    queryset = (models.Country.objects.annotate(
+        locale_name=KeyTextTransform(get_current_locale(), 'name')).order_by('locale_name'))
     serializer_class = serializers.CountryBackSerializer
     pagination_class = None
+
+
+class CountryRUDView(CountryBaseViewMixin, generics.RetrieveUpdateDestroyAPIView):
+    """RUD view for model Country."""
+    serializer_class = serializers.CountryBackSerializer
+
+
+class CountryCallingCodeListView(generics.ListAPIView):
+    """
+    ## Country codes view.
+    ### Response
+    ```
+    [
+      "+7",
+      "+386",
+      "+352"
+    ]
+    ```
+    ### Description
+    Return an array of unique country code for all countries in a database.
+    """
+    pagination_class = None
     permission_classes = get_permission_classes(
         IsEstablishmentManager,
         IsEstablishmentAdministrator,
         IsGuest,
     )
 
-
-class CountryRUDView(generics.RetrieveUpdateDestroyAPIView):
-    """RUD view for model Country."""
-    serializer_class = serializers.CountryBackSerializer
-    queryset = models.Country.objects.all()
-    permission_classes = get_permission_classes(
-        IsEstablishmentManager,
-        IsEstablishmentAdministrator,
-        IsGuest,
-    )
+    def get(self, request, *args, **kwargs):
+        """
+        ## Country codes view.
+        ### Response
+        ```
+        [
+          "+7",
+          "+386",
+          "+352"
+        ]
+        ```
+        ### Description
+        Return an array of unique country code for all countries in a database.
+        """
+        return Response(models.Country.objects.only('calling_code')
+                                      .aggregate_country_codes(),
+                        status=status.HTTP_200_OK)