From 16a6c7c3c0716dfc7941221469c121cc73a51178 2015-02-27 18:49:50
From: Lance Edgar <ledgar@sacfoodcoop.com>
Date: 2015-02-27 18:49:50
Subject: [PATCH] Add `GPC.pretty()` method.

---

diff --git a/rattail/db/model/products.py b/rattail/db/model/products.py
index 324fb99218fbb41d4827ca0051090fafae0e46c7..d0b7eabf84e3380917190b5c10840aae4edab0bc 100644
--- a/rattail/db/model/products.py
+++ b/rattail/db/model/products.py
@@ -219,7 +219,7 @@ associates, if any.
         """
         if self.upc is None:
             return None
-        return "{0}-{1}".format(unicode(self.upc)[:-1], unicode(self.upc)[-1])
+        return self.upc.pretty()
 
     def cost_for_vendor(self, vendor):
         """
diff --git a/rattail/gpc.py b/rattail/gpc.py
index 12ebedae74324c1b9a624e03f9a2dc980dde0d28..b6da852e352b58f7fe19f475e3fa1a6184ee1c05 100644
--- a/rattail/gpc.py
+++ b/rattail/gpc.py
@@ -99,3 +99,11 @@ class GPC(object):
 
     def __unicode__(self):
         return u'%014d' % self.value
+
+    def pretty(self):
+        """
+        Returns the UPC as a somewhat more human-readable string.  Basically
+        that just means the check digit is distinguished by a hyphen.
+        """
+        upc = unicode(self)
+        return "{0}-{1}".format(upc[:-1], upc[-1])