Don't explode on invalid dates

src/documents/models.py

@@ -394,7 +394,10 @@ class FileInfo(object):
 
     @classmethod
     def _get_created(cls, created):
-        return dateutil.parser.parse("{:0<14}Z".format(created[:-1]))
+        try:
+            return dateutil.parser.parse("{:0<14}Z".format(created[:-1]))
+        except ValueError:
+            return None
 
     @classmethod
     def _get_correspondent(cls, name):

src/documents/tests/test_consumer.py

@@ -359,3 +359,8 @@ class TestFieldPermutations(TestCase):
                         }
                         self._test_guessed_attributes(
                             template.format(**spec), **spec)
+
+    def test_invalid_date_format(self):
+        info = FileInfo.from_path("/path/to/06112017Z - title.pdf")
+        self.assertEqual(info.title, "title")
+        self.assertIsNone(info.created)