Change owner obfuscation of half-hitas owners to use completion date instead of purchase date

backend/hitas/services/owner.py

@@ -1,14 +1,14 @@
 from auditlog.context import disable_auditlog
 from dateutil.relativedelta import relativedelta
 from django.db import models
-from django.db.models import Count, Max, OuterRef, Q, QuerySet, Subquery
+from django.db.models import Count, OuterRef, Q, QuerySet, Subquery
 from django.db.models.functions import Coalesce
 from django.utils import timezone
 
 from hitas.models.housing_company import HitasType, RegulationStatus
 from hitas.models.owner import Owner, OwnerT
 from hitas.models.ownership import Ownership, OwnershipWithApartmentCount
-from hitas.utils import SQSum, subquery_count
+from hitas.utils import SQSum, max_date_if_all_not_null, subquery_count
 
 
 def exclude_obfuscated_owners(owners: QuerySet[Owner]) -> QuerySet[Owner]:
@@ -47,7 +47,7 @@ def obfuscate_owners_without_regulated_apartments() -> list[OwnerT]:
             ),
             0,
         ),
-        _latest_half_hitas_sale_purchase_date=Subquery(
+        _latest_half_hitas_completion_date=Subquery(
             queryset=(
                 Ownership.objects.select_related(
                     "owner",
@@ -57,18 +57,22 @@ def obfuscate_owners_without_regulated_apartments() -> list[OwnerT]:
                     owner__id=OuterRef("id"),
                     sale__apartment__building__real_estate__housing_company__hitas_type=HitasType.HALF_HITAS,
                 )
-                .annotate(_latest_purchase_date=Max("sale__purchase_date"))
-                .order_by("-_latest_purchase_date")
-                .values_list("_latest_purchase_date", flat=True)[:1]
+                .annotate(
+                    _completion_date=max_date_if_all_not_null(
+                        "sale__apartment__building__real_estate__housing_company__real_estates__buildings__apartments__completion_date"
+                    )
+                )
+                .order_by("-_completion_date")
+                .values_list("_completion_date", flat=True)[:1]
             ),
             output_field=models.DateField(null=True),
         ),
     ).filter(
         (
-            # If owner owns any half-hitas apartments, they must have been purchased
+            # If owner owns any half-hitas apartments, their housing companies must have been completed
             # at least 2 years ago so that the owner is allowed to be obfuscated
-            Q(_latest_half_hitas_sale_purchase_date__isnull=True)
-            | Q(_latest_half_hitas_sale_purchase_date__lte=timezone.now().date() - relativedelta(years=2))
+            Q(_latest_half_hitas_completion_date__isnull=True)
+            | Q(_latest_half_hitas_completion_date__lte=timezone.now().date() - relativedelta(years=2))
         ),
         _owned_regulated_apartments=0,
     )

backend/hitas/tests/services/test_services_owner.py

@@ -167,6 +167,7 @@ def test_obfuscate_owners_without_regulated_apartments__half_hitas_sales_after_r
         sales=[],
         building__real_estate__housing_company__regulation_status=RegulationStatus.RELEASED_BY_HITAS,
         building__real_estate__housing_company__hitas_type=HitasType.HALF_HITAS,
+        completion_date="2020-01-01",
     )
 
     unsold_apartments_count = get_number_of_unsold_apartments(apartment.housing_company)