Separate personalization from admission (#2990)

Co-authored-by: Richard Schreiber <schreiber@rami.io>

src/pretix/base/migrations/0227_item_personalized.py

@@ -0,0 +1,27 @@
+# Generated by Django 3.2.16 on 2022-12-21 08:59
+
+from django.db import migrations, models
+
+
+def item_set_personalized(apps, schema_editor):
+    # We cannot really know if a position was bundled or an add-on, but we can at least guess
+    Item = apps.get_model("pretixbase", "Item")
+    Item.objects.filter(admission=True).update(personalized=True)
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0226_itemvariationmetavalue'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='personalized',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.RunPython(
+            item_set_personalized,
+            migrations.RunPython.noop,
+        ),
+    ]