From 3acd88e8c4715ed4e9e98fa5f916177838472b17 Mon Sep 17 00:00:00 2001
From: Brandon Taylor <alsoicode@gmail.com>
Date: Fri, 24 Oct 2014 20:28:36 -0400
Subject: [PATCH] Added utility function to check if a model defined as a
 sortable foreign key inherits from Sortable and if there are more than one
 objects for that model.

---
 adminsortable/utils.py | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/adminsortable/utils.py b/adminsortable/utils.py
index e2948cf..c858f88 100644
--- a/adminsortable/utils.py
+++ b/adminsortable/utils.py
@@ -1,5 +1,17 @@
+from .models import Sortable
+
+
 def get_is_sortable(objects):
     if objects:
-        if objects.count() > 1:
-            return True
+        if issubclass(type(objects[0]), Sortable):
+            if objects.count() > 1:
+                return True
+    return False
+
+
+def check_model_is_sortable(cls):
+    if cls:
+        if issubclass(type(cls), Sortable):
+            if cls.objects.count() > 1:
+                return True
     return False