Add initial implementations for forms and organization apps with serializers, factories, and admin configurations

tests/apps/organization/test_models.py

@@ -1,5 +1,8 @@
 """Tests for Organization model."""
 
+from datetime import date
+
+from apps.registers.models import Register, RegisterUpload, RegistryMembershipPeriod
 from django.test import TestCase
 
 from .factories import OrganizationFactory
@@ -50,3 +53,40 @@ class OrganizationModelTest(TestCase):
     def test_ogrn_index_exists(self):
         """Test OGRN has db_index."""
         self.assertTrue(self.org._meta.get_field("ogrn").db_index)
+
+    def test_active_registry_names_include_only_current_memberships(self):
+        """Test only active registry memberships are shown on organization."""
+        active_register = Register.objects.create(name="Активный реестр")
+        inactive_register = Register.objects.create(name="Неактуальный реестр")
+        active_upload = RegisterUpload.objects.create(
+            registry=active_register,
+            actual_date=date(2026, 3, 1),
+            file_name="active.xlsx",
+            file_hash="active-hash",
+            rows_count=1,
+        )
+        inactive_upload = RegisterUpload.objects.create(
+            registry=inactive_register,
+            actual_date=date(2026, 2, 1),
+            file_name="inactive.xlsx",
+            file_hash="inactive-hash",
+            rows_count=1,
+        )
+
+        RegistryMembershipPeriod.objects.create(
+            registry=active_register,
+            organization=self.org,
+            started_at=date(2026, 3, 1),
+            started_by_upload=active_upload,
+        )
+        RegistryMembershipPeriod.objects.create(
+            registry=inactive_register,
+            organization=self.org,
+            started_at=date(2026, 2, 1),
+            ended_at=date(2026, 3, 1),
+            started_by_upload=inactive_upload,
+            ended_by_upload=inactive_upload,
+        )
+
+        self.assertEqual(self.org.get_active_registry_names(), ["Активный реестр"])
+        self.assertEqual(self.org.active_registry_names_display(), "Активный реестр")