Remove deprecated auto_checkin_sales_channels (#4587)

* Remove deprecated auto_checkin_sales_channels

* Fix Query count

src/pretix/base/migrations/0273_remove_checkinlist_auto_checkin_sales_channels.py

@@ -0,0 +1,48 @@
+# Generated by Django 4.2.16 on 2024-10-29 15:03
+
+from django.db import migrations
+
+
+def migrate_autocheckin(apps, schema_editor):
+    CheckinList = apps.get_model("pretixbase", "CheckinList")
+    AutoCheckinRule = apps.get_model("autocheckin", "AutoCheckinRule")
+
+    for cl in CheckinList.objects.filter(auto_checkin_sales_channels__isnull=False).select_related("event", "event__organizer"):
+        sales_channels = cl.auto_checkin_sales_channels.all()
+        all_sales_channels = cl.event.organizer.sales_channels.all()
+
+        if "pretix.plugins.autocheckin" not in cl.event.plugins:
+            cl.event.plugins = cl.event.plugins + ",pretix.plugins.autocheckin"
+            cl.event.save()
+
+        r = AutoCheckinRule.objects.get_or_create(
+            list=cl,
+            event=cl.event,
+            all_products=True,
+            all_payment_methods=True,
+            defaults=dict(
+                mode="placed",
+                all_sales_channels=len(sales_channels) == len(all_sales_channels),
+            )
+        )[0]
+        if len(sales_channels) != len(all_sales_channels):
+            r.limit_sales_channels.set(sales_channels)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0272_printlog"),
+        ("autocheckin", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            migrate_autocheckin,
+            migrations.RunPython.noop,
+        ),
+        migrations.RemoveField(
+            model_name="checkinlist",
+            name="auto_checkin_sales_channels",
+        ),
+    ]