Sort items on the order they're added.

django_enumfield/enumeration.py

@@ -27,7 +27,7 @@ def __new__(mcs, name, bases, attrs):
 
                 items.append((n, item))
 
-        items.sort(key=lambda i: i[1].display)
+        items.sort(key=lambda i: i[1].creation_counter)
         item_objects = [i[1] for i in items]
 
         by_val = dict((i.value, i) for i in item_objects)

django_enumfield/item.py

@@ -1,4 +1,11 @@
+class ItemMeta(type):
+    def __new__(mcs, name, bases, attrs):
+        mcs.creation_counter = 0
+        return super(ItemMeta, mcs).__new__(mcs, name, bases, attrs)
+
 class Item(object):
+    __metaclass__ = ItemMeta
+
     def __init__(self, value, slug, display=None):
         if not isinstance(value, int):
             raise TypeError("item value should be an integer, not %r" \
@@ -22,6 +29,9 @@ def __init__(self, value, slug, display=None):
         else:
             self.display = display
 
+        self.creation_counter = Item.creation_counter
+        Item.creation_counter += 1
+
     def __str__(self):
         return self.__unicode__()