add migration to remove old start_args

awx/main/migrations/0011_blank_start_args.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Python
+from __future__ import unicode_literals
+
+# Django
+from django.db import migrations, models
+
+# AWX
+from awx.main.migrations import _migration_utils as migration_utils
+from awx.main.migrations._reencrypt import blank_old_start_args
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0010_saved_launchtime_configs'),
+    ]
+
+    operations = [
+        migrations.RunPython(migration_utils.set_current_apps_for_migrations, migrations.RunPython.noop),
+        migrations.RunPython(blank_old_start_args, migrations.RunPython.noop),
+    ]

awx/main/migrations/_reencrypt.py

@@ -74,3 +74,20 @@ def _unified_jobs(apps):
                 uj.start_args = decrypt_field(uj, 'start_args')
                 uj.start_args = encrypt_field(uj, 'start_args')
                 uj.save()
+
+
+def blank_old_start_args(apps, schema_editor):
+    UnifiedJob = apps.get_model('main', 'UnifiedJob')
+    for uj in UnifiedJob.objects.defer('result_stdout_text').exclude(start_args='').iterator():
+        if uj.status in ['running', 'pending', 'new', 'waiting']:
+            continue
+        try:
+            args_dict = decrypt_field(uj, 'start_args')
+        except ValueError:
+            args_dict = None
+        if args_dict == {}:
+            continue
+        if uj.start_args:
+            logger.debug('Blanking job args for %s', uj.pk)
+            uj.start_args = ''
+            uj.save()