feat: consolidate past payments data

Move all past payments to current service customer.

pyproject.toml

@@ -127,5 +127,6 @@ max-complexity = 16
 [tool.ruff.lint.per-file-ignores]
 "scripts/*" = ["T201"]
 "weblate_web/migrations/0031_fill_in_customer.py" = ["T201"]
+"weblate_web/migrations/0038_migrate_payments.py" = ["T201"]
 "weblate_web/payments/backends.py" = ["T201"]
 "weblate_web/payments/migrations/0040_fill_in_users.py" = ["T201"]

weblate_web/migrations/0038_migrate_payments.py

@@ -0,0 +1,31 @@
+# Generated by Django 5.1.3 on 2024-12-18 11:45
+
+from django.db import migrations
+
+
+def migrate_payments(payments, customer):
+    print(f"Moving {len(payments)} payments to {customer.name}")
+    payments.update(customer=customer)
+
+
+def update_payments(apps, schema_editor):
+    Subscription = apps.get_model("weblate_web", "Subscription")
+    Payment = apps.get_model("payments", "Payment")
+
+    for subscription in Subscription.objects.prefetch_related("pastpayments_set"):
+        payment_ids = {subscription.payment}
+        payment_ids.update(past.payment for past in subscription.pastpayments_set.all())
+        migrate_payments(
+            Payment.objects.filter(pk__in=payment_ids), subscription.service.customer
+        )
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("weblate_web", "0037_package_hidden"),
+        ("payments", "0037_alter_customer_vat"),
+    ]
+
+    operations = [
+        migrations.RunPython(update_payments, migrations.RunPython.noop, elidable=True),
+    ]