From 50966e7a4f229ae7920603910eb1c23e77401fc6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Barrag=C3=A1n=20Merino?=
 <david.barragan@kaleidos.net>
Date: Thu, 9 Oct 2014 18:58:51 +0200
Subject: [PATCH] US #675: Define on delete action

---
 .../migrations/0005_auto_20141009_1656.py     | 20 +++++++++++++++++++
 taiga/projects/userstories/models.py          |  1 +
 2 files changed, 21 insertions(+)
 create mode 100644 taiga/projects/userstories/migrations/0005_auto_20141009_1656.py

diff --git a/taiga/projects/userstories/migrations/0005_auto_20141009_1656.py b/taiga/projects/userstories/migrations/0005_auto_20141009_1656.py
new file mode 100644
index 00000000..f8a2efda
--- /dev/null
+++ b/taiga/projects/userstories/migrations/0005_auto_20141009_1656.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('userstories', '0004_auto_20141001_1817'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='userstory',
+            name='generated_from_issue',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.SET_NULL, blank=True, to='issues.Issue', verbose_name='generated from issue', related_name='generated_user_stories', null=True),
+        ),
+    ]
diff --git a/taiga/projects/userstories/models.py b/taiga/projects/userstories/models.py
index a520b3df..7f824c84 100644
--- a/taiga/projects/userstories/models.py
+++ b/taiga/projects/userstories/models.py
@@ -94,6 +94,7 @@ class UserStory(OCCModelMixin, WatchedModelMixin, BlockedMixin, TaggedMixin, mod
                                            verbose_name=_("is team requirement"))
     attachments = generic.GenericRelation("attachments.Attachment")
     generated_from_issue = models.ForeignKey("issues.Issue", null=True, blank=True,
+                                             on_delete=models.SET_NULL,
                                              related_name="generated_user_stories",
                                              verbose_name=_("generated from issue"))
     _importing = None