allow service controller to be null
diff --git a/xos/core/models/service.py b/xos/core/models/service.py
index 4014f5d..a0791f7 100644
--- a/xos/core/models/service.py
+++ b/xos/core/models/service.py
@@ -132,7 +132,8 @@
service_specific_attribute = models.TextField(blank=True, null=True)
controller = models.ForeignKey(ServiceController, related_name='services',
- help_text="The Service Controller this Service uses")
+ help_text="The Service Controller this Service uses",
+ null=True, blank=True)
def __init__(self, *args, **kwargs):
# for subclasses, set the default kind appropriately