Set expiration_mail_sent in partners default to False

website/partners/migrations/0011_auto_20170912_2036.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.4 on 2017-09-12 18:36
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('partners', '0010_vacancy_expiration_mail_sent'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='vacancy',
+            name='expiration_mail_sent',
+            field=models.BooleanField(default=False),
+        ),
+    ]

website/partners/models.py

@@ -116,7 +116,7 @@ class Vacancy(models.Model):
     categories = models.ManyToManyField(VacancyCategory, blank=True)
 
     expiration_date = models.DateField(null=True, blank=True)
-    expiration_mail_sent = models.BooleanField()
+    expiration_mail_sent = models.BooleanField(default=False)
 
     remarks = HTMLField(blank=True, help_text=_('not shown on the page'))