Playlists: resolve synthetic mirrored batch refs (youtube_mirrored_<pk>/auto_mirror_<pk>) to PK

core/playlists/source_refs.py

@@ -19,6 +19,31 @@ from urllib.parse import parse_qs, urlparse
 
 _SPOTIFY_ID_RE = re.compile(r"^[A-Za-z0-9]{16,32}$")
 
+# Synthetic batch playlist_id prefixes that wrap a mirrored_playlists PK.
+# Download/discovery flows build a batch playlist_id as f"{prefix}{pk}" — e.g.
+# auto_mirror_<pk> (core/automation/handlers/sync_playlist.py), youtube_mirrored_<pk>
+# (YouTube discovery), and mirrored_<pk> (web_server url hashes). The trailing
+# digits are the mirrored_playlists primary key, NOT an upstream source id, so a
+# (source, source_playlist_id) lookup will never match them.
+_MIRRORED_PK_PREFIXES = ("youtube_mirrored_", "auto_mirror_", "mirrored_")
+
+
+def extract_mirrored_pk(playlist_ref: object) -> Optional[int]:
+    """Return the mirrored_playlists PK from a synthetic batch ref, else None.
+
+    Handles the synthetic forms above plus a bare numeric ref. Anything else
+    (a real upstream source id) returns None so the caller falls back to a
+    (source, source_playlist_id) lookup.
+    """
+    ref = str(playlist_ref or "").strip()
+    if not ref:
+        return None
+    for prefix in _MIRRORED_PK_PREFIXES:
+        if ref.startswith(prefix):
+            tail = ref[len(prefix):]
+            return int(tail) if tail.isdigit() else None
+    return int(ref) if ref.isdigit() else None
+
 
 @dataclass(frozen=True)
 class MirroredSourceRef:

database/music_database.py

@@ -13704,8 +13704,12 @@ class MusicDatabase:
             row = self.get_mirrored_playlist_by_source(default_source, ref, profile_id)
             if row:
                 return row
-        if ref.isdigit():
-            return self.get_mirrored_playlist(int(ref))
+        # Fallback: bare numeric ref or a synthetic batch id (auto_mirror_<pk>,
+        # youtube_mirrored_<pk>, mirrored_<pk>) whose trailing digits are the PK.
+        from core.playlists.source_refs import extract_mirrored_pk
+        pk = extract_mirrored_pk(ref)
+        if pk is not None:
+            return self.get_mirrored_playlist(pk)
         return None
 
     def set_mirrored_playlist_organize_by_playlist(

tests/test_resolve_mirrored_playlist.py

@@ -55,3 +55,30 @@ def test_empty_refs_return_none(tmp_path):
     assert db.resolve_mirrored_playlist(None) is None
     assert db.resolve_mirrored_playlist('') is None
     assert db.resolve_mirrored_playlist('   ') is None
+
+
+def test_synthetic_mirrored_batch_ref_resolves_by_pk(tmp_path):
+    """A discovery/mirror batch carries a synthetic playlist_id like
+    youtube_mirrored_<pk> with batch source 'mirrored'. (source, source_playlist_id)
+    can't match it — it must resolve via the embedded PK. Regression for the
+    organize-by-playlist 'all found but no folder built' report."""
+    db = MusicDatabase(str(tmp_path / "m.db"))
+    pk = db.mirror_playlist(source='youtube', source_playlist_id='abc123XYZ',
+                            name='My Mirror', tracks=[], profile_id=1)
+    assert pk
+    for ref in (f'youtube_mirrored_{pk}', f'auto_mirror_{pk}', f'mirrored_{pk}'):
+        row = db.resolve_mirrored_playlist(ref, profile_id=1, default_source='mirrored')
+        assert row is not None and row['id'] == pk, ref
+
+
+def test_extract_mirrored_pk_pure():
+    from core.playlists.source_refs import extract_mirrored_pk
+    assert extract_mirrored_pk('youtube_mirrored_63') == 63
+    assert extract_mirrored_pk('auto_mirror_7') == 7
+    assert extract_mirrored_pk('mirrored_12') == 12
+    assert extract_mirrored_pk('42') == 42          # bare PK
+    assert extract_mirrored_pk('908622995') == 908622995  # numeric upstream id (PK fallback only)
+    assert extract_mirrored_pk('37i9dQZF1DXcBWIGoYBM5M') is None  # real spotify id
+    assert extract_mirrored_pk('youtube_mirrored_') is None       # no digits
+    assert extract_mirrored_pk('') is None
+    assert extract_mirrored_pk(None) is None