Merge pull request #381 from taigaio/issue/2967/dont-delete-tasks-on-milestone-delete

Issue#2967: Don't delete tasks on milestone delete

taiga/projects/tasks/migrations/0007_auto_20150629_1556.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tasks', '0006_auto_20150623_1923'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='task',
+            name='milestone',
+            field=models.ForeignKey(to='milestones.Milestone', related_name='tasks', default=None, verbose_name='milestone', on_delete=django.db.models.deletion.SET_NULL, null=True, blank=True),
+            preserve_default=True,
+        ),
+    ]

taiga/projects/tasks/models.py

@@ -39,7 +39,7 @@ class Task(OCCModelMixin, WatchedModelMixin, BlockedMixin, TaggedMixin, models.M
                                related_name="tasks", verbose_name=_("status"))
     project = models.ForeignKey("projects.Project", null=False, blank=False,
                                 related_name="tasks", verbose_name=_("project"))
-    milestone = models.ForeignKey("milestones.Milestone", null=True, blank=True,
+    milestone = models.ForeignKey("milestones.Milestone", null=True, blank=True, on_delete=models.SET_NULL,
                                   default=None, related_name="tasks",
                                   verbose_name=_("milestone"))
     created_date = models.DateTimeField(null=False, blank=False,