Fixes user delete when they have a bookmark (#14867)

* fixes user delete when they have a bookmark #14851

* Include migration for user field

---------

Co-authored-by: Jeremy Stretch <jstretch@netboxlabs.com>

netbox/extras/migrations/0106_bookmark_user_cascade_deletion.py

@@ -0,0 +1,21 @@
+# Generated by Django 4.2.9 on 2024-01-19 19:46
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('extras', '0105_customfield_min_max_values'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bookmark',
+            name='user',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+        ),
+    ]

netbox/extras/models/models.py

@@ -771,7 +771,7 @@ class Bookmark(models.Model):
     )
     user = models.ForeignKey(
         to=settings.AUTH_USER_MODEL,
-        on_delete=models.PROTECT
+        on_delete=models.CASCADE
     )
 
     objects = RestrictedQuerySet.as_manager()