Only handle multiple genres in discogs

beetsplug/discogs/__init__.py

@@ -352,12 +352,11 @@ class DiscogsPlugin(MetadataSourcePlugin):
         mediums = [t["medium"] for t in tracks]
         country = result.data.get("country")
         data_url = result.data.get("uri")
-        style = self.format(result.data.get("styles"))
-        base_genre = self.format(result.data.get("genres"))
+        styles: list[str] = result.data.get("styles") or []
+        genres: list[str] = result.data.get("genres") or []
 
-        genre = base_genre
-        if self.config["append_style_genre"] and genre is not None and style:
-            genre += f"{self.config['separator'].as_str()}{style}"
+        if self.config["append_style_genre"]:
+            genres.extend(styles)
 
         discogs_albumid = self._extract_id(result.data.get("uri"))
 
@@ -411,8 +410,8 @@ class DiscogsPlugin(MetadataSourcePlugin):
             releasegroup_id=master_id,
             catalognum=catalogno,
             country=country,
-            style=style,
-            genre=genre,
+            style=self.config["separator"].as_str().join(styles) or None,
+            genres=genres,
             media=media,
             original_year=original_year,
             data_source=self.data_source,
@@ -433,14 +432,6 @@ class DiscogsPlugin(MetadataSourcePlugin):
 
         return None
 
-    def format(self, classification: Iterable[str]) -> str | None:
-        if classification:
-            return (
-                self.config["separator"].as_str().join(sorted(classification))
-            )
-        else:
-            return None
-
     def get_tracks(
         self,
         tracklist: list[Track],

docs/plugins/discogs.rst

@@ -116,17 +116,21 @@ Default
 .. conf:: append_style_genre
     :default: no
 
-    Appends the Discogs style (if found) to the genre tag. This can be useful if
-    you want more granular genres to categorize your music. For example,
-    a release in Discogs might have a genre of "Electronic" and a style of
-    "Techno": enabling this setting would set the genre to be "Electronic,
-    Techno" (assuming default separator of ``", "``) instead of just
-    "Electronic".
+    Appends the Discogs style (if found) to the ``genres`` tag. This can be
+    useful if you want more granular genres to categorize your music. For
+    example, a release in Discogs might have a genre of "Electronic" and a style
+    of "Techno": enabling this setting would append "Techno" to the ``genres``
+    list.
 
 .. conf:: separator
     :default: ", "
 
-    How to join multiple genre and style values from Discogs into a string.
+    How to join multiple style values from Discogs into a string.
+
+    .. versionchanged:: 2.7.0
+
+       This option now only applies to the ``style`` field as beets now only
+       handles lists of ``genres``.
 
 .. conf:: strip_disambiguation
     :default: yes