From c9bf10421b31aab595ad862e8c06e021b273d488 Mon Sep 17 00:00:00 2001
From: Jeremy Stretch <jstretch@digitalocean.com>
Date: Thu, 30 Jun 2016 17:13:55 -0400
Subject: [PATCH] Fixes #136: Trigger error on prefix w/host bits set instead
 of silently converting it

---
 netbox/ipam/fields.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/netbox/ipam/fields.py b/netbox/ipam/fields.py
index d8478e980..098f753c9 100644
--- a/netbox/ipam/fields.py
+++ b/netbox/ipam/fields.py
@@ -10,7 +10,13 @@ from .lookups import (
 )
 
 
+def prefix_validator(prefix):
+    if prefix.ip != prefix.cidr.ip:
+        raise ValidationError("{} is not a valid prefix. Did you mean {}?".format(prefix, prefix.cidr))
+
+
 class BaseIPField(models.Field):
+    default_validators = [prefix_validator]
 
     def python_type(self):
         return IPNetwork