fix(beatmap): fix beatmap.beatmapset is None when it from from_resp

app/database/beatmap.py

@@ -90,8 +90,7 @@ class Beatmap(BeatmapBase, table=True):
         if not (await session.exec(select(exists()).where(Beatmap.id == resp.id))).first():
             session.add(beatmap)
             await session.commit()
-            beatmap = (await session.exec(select(Beatmap).where(Beatmap.id == resp.id))).first()
-            assert beatmap is not None, "Beatmap should not be None after commit"
+        beatmap = (await session.exec(select(Beatmap).where(Beatmap.id == resp.id))).one()
         return beatmap
 
     @classmethod
@@ -124,9 +123,14 @@ class Beatmap(BeatmapBase, table=True):
         bid: int | None = None,
         md5: str | None = None,
     ) -> "Beatmap":
-        beatmap = (
-            await session.exec(select(Beatmap).where(Beatmap.id == bid if bid is not None else Beatmap.checksum == md5))
-        ).first()
+        stmt = select(Beatmap)
+        if bid is not None:
+            stmt = stmt.where(Beatmap.id == bid)
+        elif md5 is not None:
+            stmt = stmt.where(Beatmap.checksum == md5)
+        else:
+            raise ValueError("Either bid or md5 must be provided")
+        beatmap = (await session.exec(stmt)).first()
         if not beatmap:
             resp = await fetcher.get_beatmap(bid, md5)
             r = await session.exec(select(Beatmapset.id).where(Beatmapset.id == resp.beatmapset_id))

app/database/beatmapset.py

@@ -167,6 +167,7 @@ class Beatmapset(AsyncAttrs, BeatmapsetBase, table=True):
             session.add(beatmapset)
             await session.commit()
         await Beatmap.from_resp_batch(session, resp.beatmaps, from_=from_)
+        beatmapset = (await session.exec(select(Beatmapset).where(Beatmapset.id == resp.id))).one()
         return beatmapset
 
     @classmethod