Set default value for validation_slug

membership/migrations/0007_auto_20180213_0128.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2018-02-13 01:28
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import membership.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('membership', '0006_auto_20160526_0445'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='customuser',
+            name='validation_slug',
+            field=models.CharField(db_index=True, default=membership.models.get_validation_slug, max_length=50, unique=True),
+        ),
+    ]

membership/models.py

@@ -59,6 +59,10 @@ class MyUserManager(BaseUserManager):
         return user
 
 
+def get_validation_slug():
+    return make_password(None)
+
+
 class CustomUser(AbstractBaseUser, PermissionsMixin):
     VALIDATED_CHOICES = ((0, 'Not validated'), (1, 'Validated'))
     site = models.ForeignKey(Site, default=1)
@@ -66,8 +70,12 @@ class CustomUser(AbstractBaseUser, PermissionsMixin):
     email = models.EmailField(unique=True)
 
     validated = models.IntegerField(choices=VALIDATED_CHOICES, default=0)
-    validation_slug = models.CharField(db_index=True, unique=True,
+    # By default, we initialize the validation_slug with appropriate value
-                                       max_length=50)
+    # This is required for User(page) admin
+    validation_slug = models.CharField(
+        db_index=True, unique=True, max_length=50,
+        default=get_validation_slug
+    )
     is_admin = models.BooleanField(
         _('staff status'),
         default=False,