Make optional Item.buy_date for hardware provisioning

hardware_provisioning/migrations/0014_auto_20170422_1847.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('hardware_provisioning', '0013_auto_20161110_2246'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='item',
+            name='buy_date',
+            field=models.DateField(null=True, verbose_name='date d\u2019achat', blank=True),
+        ),
+    ]

hardware_provisioning/models.py

@@ -47,7 +47,7 @@ class Item(models.Model):
         verbose_name='N° de série',
         max_length=250, blank=True, null=True, unique=True,
         help_text='ou toute autre référence unique)')
-    buy_date = models.DateField(verbose_name='date d’achat')
+    buy_date = models.DateField(verbose_name='date d’achat' , blank=True , null=True)
     owner = models.ForeignKey(
         settings.AUTH_USER_MODEL,
         verbose_name='Propriétaire',