Payload on Data should be null

SatNOGS/base/migrations/0007_auto_20141027_0000.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('base', '0006_auto_20141025_2010'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='data',
+            name='payload',
+            field=models.FileField(null=True, upload_to=b'data_payloads'),
+        ),
+    ]

SatNOGS/base/models.py

@@ -110,4 +110,4 @@ class Data(models.Model):
     end = models.DateTimeField()
     observation = models.ForeignKey(Observation)
     ground_station = models.ForeignKey(Station)
-    payload = models.FileField(upload_to='data_payloads')
+    payload = models.FileField(upload_to='data_payloads', null=True)