models: Add Album.num_discs (#286)

docs/changes.rst

@@ -83,6 +83,8 @@ Current limitations:
 
 - Add :attr:`mopidy.models.Track.disc_no` field. (Partly fixes: :issue:`286`)
 
+- Add :attr:`mopidy.models.Album.num_discs` field. (Partly fixes: :issue:`286`)
+
 
 v0.11.1 (2012-12-24)
 ====================

mopidy/models.py

@@ -163,6 +163,8 @@ class Album(ImmutableObject):
     :type artists: list of :class:`Artist`
     :param num_tracks: number of tracks in album
     :type num_tracks: integer
+    :param num_discs: number of discs in album
+    :type num_discs: integer or :class:`None` if unknown
     :param date: album release date (YYYY or YYYY-MM-DD)
     :type date: string
     :param musicbrainz_id: MusicBrainz ID
@@ -183,6 +185,9 @@ class Album(ImmutableObject):
     #: The number of tracks in the album. Read-only.
     num_tracks = 0
 
+    #: The number of discs in the album. Read-only.
+    num_discs = None
+
     #: The album release date. Read-only.
     date = None
 

tests/models_test.py

@@ -199,10 +199,16 @@ class AlbumTest(unittest.TestCase):
 
     def test_num_tracks(self):
         num_tracks = 11
-        album = Album(num_tracks=11)
+        album = Album(num_tracks=num_tracks)
         self.assertEqual(album.num_tracks, num_tracks)
         self.assertRaises(AttributeError, setattr, album, 'num_tracks', None)
 
+    def test_num_discs(self):
+        num_discs = 2
+        album = Album(num_discs=num_discs)
+        self.assertEqual(album.num_discs, num_discs)
+        self.assertRaises(AttributeError, setattr, album, 'num_discs', None)
+
     def test_date(self):
         date = '1977-01-01'
         album = Album(date=date)