Fix form with files

counter/migrations/0006_auto_20160831_1304.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('counter', '0005_auto_20160826_2330'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='product',
+            name='buying_groups',
+            field=models.ManyToManyField(related_name='products', verbose_name='buying groups', blank=True, to='core.Group'),
+        ),
+    ]