Resolved purge vs export conflict

When there was a completed export in the task list, task purge
would fail as the task could not be deleted because of a dependency
to a linked object. This issue has been resolved.

fixes: pulp#3741

CHANGES/3741.bugfix

@@ -0,0 +1 @@
+Fixed issue with deleting export tasks via purge.

pulpcore/app/migrations/0103_alter_export_task.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.18 on 2023-04-04 16:30
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0102_add_domain_relations'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='export',
+            name='task',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='core.task'),
+        ),
+    ]

pulpcore/app/models/exporter.py

@@ -27,7 +27,7 @@ class Export(BaseModel):
     """
 
     params = models.JSONField(null=True)
-    task = models.ForeignKey("Task", on_delete=models.PROTECT, null=True)
+    task = models.ForeignKey("Task", on_delete=models.SET_NULL, null=True)
     exporter = models.ForeignKey("Exporter", on_delete=models.CASCADE)