throw exception when key longer than 64 characters

gargoyle/manager.py

@@ -41,6 +41,11 @@ def is_active(self, key, *instances, **kwargs):
 
         >>> gargoyle.is_active('my_feature', request)
         """
+
+        # check for varchar(64)
+        if len(key) > 64:
+            raise ValueError('Gargoyle key can be max 64 chars, was: %s' % len(key))
+
         default = kwargs.pop('default', False)
 
         # Check all parents for a disabled state

gargoyle/testutils.py

@@ -59,6 +59,11 @@ def is_active(gargoyle):
             is_active_func = gargoyle.is_active
 
             def wrapped(key, *args, **kwargs):
+
+                # check for varchar(64)
+                if len(key) > 64:
+                    raise ValueError('Gargoyle key can be max 64 chars, was: %s' % len(key))
+
                 if key in self.keys:
                     return self.keys[key]
                 return is_active_func(key, *args, **kwargs)