Merged in [16771] from rjsparks@nostrum.com:

Add migration intended for r16770. Related to #2782.
 - Legacy-Id: 16842
Note: SVN reference [16771] has been migrated to Git commit f3fb0f8c20941710d675ca4bb2873635c2fa8624

ietf/review/migrations/0015_populate_completed_on_for_rejected.py

@@ -0,0 +1,29 @@
+# Copyright The IETF Trust 2019, All Rights Reserved
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.24 on 2019-09-30 08:17
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+def forward(apps, schema_editor):
+    ReviewAssignmentDocEvent = apps.get_model('doc','ReviewAssignmentDocEvent')
+    for event in ReviewAssignmentDocEvent.objects.filter(type="closed_review_assignment",state_id='rejected',review_assignment__completed_on__isnull=True):
+        event.review_assignment.completed_on = event.time
+        event.review_assignment.save()
+
+
+def reverse(apps, schema_editor):
+    # There's no harm in leaving the newly set completed_on values even if this is rolled back
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('review', '0014_document_primary_key_cleanup'),
+        ('doc', '0026_add_draft_rfceditor_state'),
+    ]
+
+    operations = [
+        migrations.RunPython(forward, reverse)
+    ]