From 5080ab98e8b65a166c50990967d25800d77f65e8 Mon Sep 17 00:00:00 2001
From: Jonathan Weth <git@jonathanweth.de>
Date: Tue, 6 Aug 2024 17:57:01 +0200
Subject: [PATCH] Create migration checking for old data requiring Lesrooster
to be installed
---
.../migrations/0018_check_new_models.py | 30 +++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 aleksis/apps/chronos/migrations/0018_check_new_models.py
diff --git a/aleksis/apps/chronos/migrations/0018_check_new_models.py b/aleksis/apps/chronos/migrations/0018_check_new_models.py
new file mode 100644
index 00000000..144a1af5
--- /dev/null
+++ b/aleksis/apps/chronos/migrations/0018_check_new_models.py
@@ -0,0 +1,30 @@
+from django.db import migrations, models
+
+from django.apps import apps as global_apps
+
+def check_for_migration(apps, schema_editor):
+ if global_apps.is_installed('aleksis.apps.lesrooster'):
+ return
+
+ ValidityRange = apps.get_model('chronos', 'ValidityRange')
+ Subject = apps.get_model('chronos', 'Subject')
+ AbsenceReason = apps.get_model('chronos', 'AbsenceReason')
+ Absence = apps.get_model('chronos', 'Absence')
+ Holiday = apps.get_model('chronos', 'Holiday')
+ SupervisionArea = apps.get_model('chronos', 'SupervisionArea')
+
+ model_types = [ValidityRange, Subject, AbsenceReason, Absence, Holiday, SupervisionArea]
+
+ for model in model_types:
+ if model.objects.exists():
+ raise RuntimeError("You have legacy data. Please install AlekSIS-App-Lesrooster to migrate them.")
+
+class Migration(migrations.Migration):
+
+ dependencies = [
+ ('chronos', '0017_optional_slot_number'),
+ ]
+
+ operations = [
+ migrations.RunPython(check_for_migration),
+ ]
--
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