Fixed unicode username user creation error

The code tries to construct a byte string object to test the
length of the string field (The explicit construction of the
string object is neccessary as sometime v can be other types,
for example int). This will cause error if the string field
(v) is a unicode object.

Fixes bug #1166701

Change-Id: I73cee4da5c9f91ce135e7f81d88c979871f61767

keystone/common/sql/core.py

@@ -73,8 +73,10 @@ def initialize(self, *args, **kwargs):
                 if isinstance(attr, InstrumentedAttribute):
                     column = attr.property.columns[0]
                     if isinstance(column.type, String):
+                        if not isinstance(v, unicode):
+                            v = str(v)
                         if column.type.length and \
-                                column.type.length < len(str(v)):
+                                column.type.length < len(v):
                             #if signing.token_format == 'PKI', the id will
                             #store it's public key which is very long.
                             if config.CONF.signing.token_format == 'PKI' and \

tests/test_backend.py

@@ -136,6 +136,15 @@ def test_password_hashed(self):
         user_ref = self.identity_api._get_user(self.user_foo['id'])
         self.assertNotEqual(user_ref['password'], self.user_foo['password'])
 
+    def test_create_unicode_user_name(self):
+        unicode_name = u'name \u540d\u5b57'
+        user = {'id': uuid.uuid4().hex,
+                'name': unicode_name,
+                'domain_id': DEFAULT_DOMAIN_ID,
+                'password': uuid.uuid4().hex}
+        ref = self.identity_api.create_user(user['id'], user)
+        self.assertEqual(unicode_name, ref['name'])
+
     def test_get_project(self):
         tenant_ref = self.identity_api.get_project(
             tenant_id=self.tenant_bar['id'])