LogEntry: Add a direct relationship to organizer (#3732)

* LogEntry: Add a direct relationship to organizer

* Update src/pretix/base/models/log.py

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

* Fix condition

* Fix query count

* REbase migration

* Fix tests

---------

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

src/pretix/base/migrations/0252_logentry_organizer.py

@@ -0,0 +1,56 @@
+# Generated by Django 4.2.4 on 2023-11-20 12:38
+
+import django.db.models.deletion
+from django.db import migrations, models
+from django.db.models import F, OuterRef, Subquery
+
+
+def backfill_organizer(apps, schema_editor):
+    LogEntry = apps.get_model("pretixbase", "LogEntry")
+    Event = apps.get_model("pretixbase", "Event")
+    ContentType = apps.get_model("contenttypes", "ContentType")
+
+    LogEntry.objects.filter(
+        organizer_link__isnull=True, event__isnull=False
+    ).update(organizer_link_id=Subquery(
+            Event.objects.filter(pk=OuterRef('event_id')).values('organizer_id'),
+        )
+    )
+    for ct in ContentType.objects.all():
+        try:
+            model = apps.get_model(ct.app_label, ct.model)
+        except LookupError:
+            continue
+        if "organizer" in model._meta.fields:
+            LogEntry.objects.filter(
+                organizer_link__isnull=True, event__isnull=True, content_type=ct,
+            ).update(
+                organizer_link_id=Subquery(model.objects.filter(pk=OuterRef('object_id')).values('organizer_id'))
+            )
+        elif "event" in model._meta.fields:
+            LogEntry.objects.filter(
+                organizer_link__isnull=True, event__isnull=True, content_type=ct,
+            ).update(
+                organizer_link_id=Subquery(model.objects.filter(pk=OuterRef('object_id')).values('event__organizer_id'))
+            )
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("pretixbase", "0251_order_invoice_dirty"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="logentry",
+            name="organizer_link",
+            field=models.ForeignKey(
+                null=True,
+                on_delete=django.db.models.deletion.PROTECT,
+                to="pretixbase.organizer",
+            ),
+        ),
+        migrations.RunPython(
+            backfill_organizer,
+        )
+    ]

src/pretix/base/models/base.py

@@ -84,13 +84,21 @@ class LoggingMixin:
         from .devices import Device
         from .event import Event
         from .log import LogEntry
-        from .organizer import TeamAPIToken
+        from .organizer import Organizer, TeamAPIToken
 
         event = None
-        if isinstance(self, Event):
+        organizer_id = None
+        if isinstance(self, Organizer):
+            organizer_id = self.pk
+        elif isinstance(self, Event):
             event = self
+            organizer_id = self.organizer_id
         elif hasattr(self, 'event'):
             event = self.event
+            organizer_id = self.event.organizer_id
+        elif hasattr(self, 'organizer_id'):
+            organizer_id = self.organizer_id
+
         if user and not user.is_authenticated:
             user = None
 
@@ -106,7 +114,8 @@ class LoggingMixin:
         elif isinstance(api_token, TeamAPIToken):
             kwargs['api_token'] = api_token
 
-        logentry = LogEntry(content_object=self, user=user, action_type=action, event=event, **kwargs)
+        logentry = LogEntry(content_object=self, user=user, action_type=action, event=event,
+                            organizer_link_id=organizer_id, **kwargs)
         if isinstance(data, dict):
             sensitivekeys = ['password', 'secret', 'api_key']
 

src/pretix/base/models/log.py

@@ -78,6 +78,7 @@ class LogEntry(models.Model):
     device = models.ForeignKey('Device', null=True, blank=True, on_delete=models.PROTECT)
     oauth_application = models.ForeignKey('pretixapi.OAuthApplication', null=True, blank=True, on_delete=models.PROTECT)
     event = models.ForeignKey('Event', null=True, blank=True, on_delete=models.SET_NULL)
+    organizer_link = models.ForeignKey('Organizer', null=True, blank=True, on_delete=models.PROTECT)
     action_type = models.CharField(max_length=255)
     data = models.TextField(default='{}')
     visible = models.BooleanField(default=True)
@@ -126,7 +127,9 @@ class LogEntry(models.Model):
     def organizer(self):
         from .organizer import Organizer
 
-        if self.event:
+        if self.organizer_link:
+            return self.organizer_link
+        elif self.event:
             return self.event.organizer
         elif hasattr(self.content_object, 'event'):
             return self.content_object.event.organizer