owen/lms
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Optimm to get all artists of a track in a single query

Browse Source
This commit is contained in:
emeric
2024-04-15 18:50:00 +02:00
parent 2c3365f1aa
commit 18b220b241
6 changed files with 95 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/libs/database/impl/TrackArtistLink.cpp
+22 -8
View File
@@ -39,19 +39,17 @@ namespace lms::db
if (params.linkType)
query.where("t_a_l.type = ?").bind(*params.linkType);
if (params.track.isValid() || params.release.isValid())
query.join("track t ON t.id = t_a_l.track_id");
if (params.track.isValid())
query.where("t_a_l.track_id = ?").bind(params.track);
if (params.artist.isValid())
query.join("artist a ON a.id = t_a_l.artist_id");
query.where("t_a_l.artist_id = ?").bind(params.artist);
if (params.release.isValid())
{
query.join("track t ON t.id = t_a_l.track_id");
query.where("t.release_id = ?").bind(params.release);
if (params.track.isValid())
query.where("t.id = ?").bind(params.track);
query.groupBy("t_a_l.id");
}
return query;
}
@@ -81,6 +79,22 @@ namespace lms::db
return utils::fetchQuerySingleResult(session.getDboSession()->find<TrackArtistLink>().where("id = ?").bind(id));
}
void TrackArtistLink::find(Session& session, TrackId trackId, const std::function<void(const TrackArtistLink::pointer& link, const ObjectPtr<Artist>& artist)>& func)
{
session.checkReadTransaction();
using ResultType = std::tuple < Wt::Dbo::ptr<TrackArtistLink>, Wt::Dbo::ptr<Artist>>;
const auto query{ session.getDboSession()->query<ResultType>("SELECT t_a_l, a FROM track_artist_link t_a_l")
.join("artist a ON t_a_l.artist_id = a.id")
.where("t_a_l.track_id = ?").bind(trackId) };
utils::forEachQueryResult(query, [&](const ResultType& result)
{
func(std::get<Wt::Dbo::ptr<TrackArtistLink>>(result), std::get<Wt::Dbo::ptr<Artist>>(result));
});
}
void TrackArtistLink::find(Session& session, const FindParameters& parameters, const std::function<void(const TrackArtistLink::pointer&)>& func)
{
const auto query{ createQuery(session, parameters) };