Merge pull request #1154 from niphlod/fix/1044

fixes #1044

gluon/tests/test_validators.py

@@ -618,6 +618,9 @@ class TestValidators(unittest.TestCase):
         self.assertEqual(rtn, (u'hell', None))
         rtn = IS_MATCH('hell', is_unicode=True)(u'hell')
         self.assertEqual(rtn, (u'hell', None))
+        # regr test for #1044
+        rtn = IS_MATCH('hello')(u'\xff')
+        self.assertEqual(rtn, (u'\xff', 'Invalid expression'))
 
 
     def test_IS_EQUAL_TO(self):

gluon/validators.py

@@ -201,12 +201,15 @@ class IS_MATCH(Validator):
 
     def __call__(self, value):
         if self.is_unicode:
-            if isinstance(value,unicode):
+            if not isinstance(value, unicode):
-                match = self.regex.search(value)
-            else:
                 match = self.regex.search(str(value).decode('utf8'))
+            else:
+                match = self.regex.search(value)
         else:
-            match = self.regex.search(str(value))
+            if not isinstance(value, unicode):
+                match = self.regex.search(str(value))
+            else:
+                match = self.regex.search(value.encode('utf8'))
         if match is not None:
             return (self.extract and match.group() or value, None)
         return (value, translate(self.error_message))