make sure that iter returns uniq objects..

ui/fixtures/cmd.basic.json

@@ -178,6 +178,9 @@
 	"exit": 1,
 	"stderr": "ERROR: tag needs to start with a \"+\" (add) or a \"-\" (remove).\n"
 },
+{
+	"special": "iter is unique"
+},
 {
 	"skip": 1,
 	"title": "dump is correct",

ui/medashare/cli.py

@@ -476,7 +476,13 @@ class ObjectStore(object):
 		return len(self._uuids)
 
 	def __iter__(self):
-		return iter(self._uuids.values())
+		seen = set()
+		for i in self._uuids.values():
+			if i['uuid'] in seen:
+				continue
+
+			yield i
+			seen.add(i['uuid'])
 
 	def store(self, fname):
 		'''Write out the objects in the store to the file named
@@ -1331,6 +1337,10 @@ class _TestCases(unittest.TestCase):
 					hostidpatch = mock.patch(__name__ + '.hostuuid')
 					hostidpatch.start().return_value = uuid.uuid4()
 					patches.append(hostidpatch)
+				elif special == 'iter is unique':
+					objst = ObjectStore.load(storefname)
+					uniqobjs = len(set((x['uuid'] for x in objst)))
+					self.assertEqual(len(list(objst)), uniqobjs)
 				else: # pragma: no cover
 					raise ValueError('unhandled special: %s' % repr(special))