add version field in password profile model

api/migrations/0005_password_version.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.3 on 2016-11-21 13:30
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0004_remove_entries_password_info_models'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='password',
+            name='version',
+            field=models.IntegerField(default=1),
+        ),
+    ]

api/models.py

@@ -83,5 +83,8 @@ class Password(DateMixin):
     length = models.IntegerField(default=12)
     counter = models.IntegerField(default=1)
 
+    version = models.IntegerField(default=1)
+
     def __str__(self):
         return str(self.id)
+