Add Media Field for Album and Test case to test it

beets/config_default.yaml

@@ -7,7 +7,6 @@ statefile: state.pickle
 # --------------- Plugins ---------------
 
 plugins: [musicbrainz]
-
 pluginpath: []
 
 # --------------- Import ---------------

beets/library/models.py

@@ -265,6 +265,7 @@ class Album(LibModel):
         "language": types.STRING,
         "country": types.STRING,
         "albumstatus": types.STRING,
+        "media": types.STRING,
         "albumdisambig": types.STRING,
         "releasegroupdisambig": types.STRING,
         "rg_album_gain": types.NULL_FLOAT,
@@ -320,6 +321,7 @@ def _types(cls) -> dict[str, types.Type]:
         "language",
         "country",
         "albumstatus",
+        "media",
         "albumdisambig",
         "releasegroupdisambig",
         "release_group_title",

docs/changelog.rst

@@ -21,6 +21,7 @@
 - :doc:`plugins/mbpseudo`: Add a new `mbpseudo` plugin to proactively receive
       MusicBrainz pseudo-releases as recommendations during import.
 - Added support for Python 3.13.
+-- Added album-level `$media` field derived from items’ media metadata.
 
 Bug fixes:
 

test/test_media_field.py

@@ -0,0 +1,11 @@
+from beets.library import Item
+from beets import library
+
+def test_album_media_field(tmp_path):
+    lib = library.Library(path=str(tmp_path / "library.db"),
+                          directory=str(tmp_path / "music"))
+
+    item = Item(title="Test Song", album="Test Album", media="Vinyl")
+    album = lib.add_album([item])   
+
+    assert album.media == "Vinyl"