Closes #7.

Return back raising UnknownIdException in Youtube backend to fix form validation.

docs/.gitignore

@@ -1 +1,2 @@
 _*
+!__init__.py

embed_video/backends.py

@@ -20,6 +20,7 @@ if EMBED_VIDEO_CACHE:
 class VideoDoesntExistException(Exception):
     pass
 
+
 class UnknownBackendException(Exception):
     pass
 
@@ -160,7 +161,7 @@ class YoutubeBackend(VideoBackend):
             (\S*[^\w\-\s])?
             (?P<code>[\w\-]{11})[a-z0-9;:@?&%=+/\$_.-]*  # match and extract
         ''',
-        re.I|re.X
+        re.I | re.X
     )
 
     pattern_url = 'http://www.youtube.com/embed/%s?wmode=opaque'
@@ -171,7 +172,11 @@ class YoutubeBackend(VideoBackend):
 
         if not code:
             parse_data = urlparse.urlparse(self._url)
-            code = urlparse.parse_qs(parse_data.query)['v'][0]
+
+            try:
+                code = urlparse.parse_qs(parse_data.query)['v'][0]
+            except KeyError:
+                raise UnknownIdException
 
         return code
 

embed_video/tests/tests_backend.py

@@ -1,7 +1,8 @@
 from unittest import TestCase
 
 from ..backends import detect_backend, YoutubeBackend, VimeoBackend, \
-        SoundCloudBackend, UnknownBackendException, VideoDoesntExistException
+        SoundCloudBackend, UnknownBackendException, \
+        VideoDoesntExistException, UnknownIdException
 
 
 class BackendsTestCase(TestCase):
@@ -91,3 +92,9 @@ class BackendsTestCase(TestCase):
     def test_vimeo_get_info_exception(self):
         self.assertRaises(VideoDoesntExistException, VimeoBackend,
                            'http://vimeo.com/123')
+
+    def test_youtube_keyerror(self):
+        """ Test for issue #7 """
+        self.assertRaises(UnknownIdException, YoutubeBackend,
+                          'http://youtube.com/watch?id=5')
+