feat(#49): return FK details in department and municipality serializers

- DepartmentSerializer adds country_detail (nested country object)
- MunicipalitySerializer adds department_detail and country_detail
- Writable FK id fields kept for create/update
- Move geography brief serializers to serializers/geography.py

tienda_ilusion/don_confiao/serializers/geography.py

@@ -9,13 +9,38 @@ class CountrySerializer(serializers.ModelSerializer):
         fields = ["id", "name", "code"]
 
 
-class DepartmentSerializer(serializers.ModelSerializer):
+class CountryBriefSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Country
+        fields = ["id", "name", "code"]
+
+
+class DepartmentBriefSerializer(serializers.ModelSerializer):
     class Meta:
         model = Department
-        fields = ["id", "name", "country"]
+        fields = ["id", "name"]
+
+
+class MunicipalityBriefSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Municipality
+        fields = ["id", "name"]
+
+
+class DepartmentSerializer(serializers.ModelSerializer):
+    country_detail = CountryBriefSerializer(source="country", read_only=True)
+
+    class Meta:
+        model = Department
+        fields = ["id", "name", "country", "country_detail"]
 
 
 class MunicipalitySerializer(serializers.ModelSerializer):
+    department_detail = DepartmentBriefSerializer(
+        source="department", read_only=True
+    )
+    country_detail = CountryBriefSerializer(source="country", read_only=True)
+
     class Meta:
         model = Municipality
-        fields = ["id", "name", "department", "country"]
+        fields = ["id", "name", "department", "department_detail", "country", "country_detail"]

tienda_ilusion/don_confiao/serializers/provenance.py

@@ -1,25 +1,11 @@
 from rest_framework import serializers
 
-from ..models.geography import Country, Department, Municipality
 from ..models.provenance import Organization, Supplier
-
-
-class CountryBriefSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = Country
-        fields = ["id", "name", "code"]
-
-
-class DepartmentBriefSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = Department
-        fields = ["id", "name"]
-
-
-class MunicipalityBriefSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = Municipality
-        fields = ["id", "name"]
+from .geography import (
+    CountryBriefSerializer,
+    DepartmentBriefSerializer,
+    MunicipalityBriefSerializer,
+)
 
 
 class OrganizationSerializer(serializers.ModelSerializer):