280 lines
10 KiB
C++
280 lines
10 KiB
C++
/*
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* Copyright (C) 2013-2016 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "database/Cluster.hpp"
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#include "database/Artist.hpp"
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#include "database/Directory.hpp"
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#include "database/MediaLibrary.hpp"
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#include "database/Release.hpp"
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#include "database/ScanSettings.hpp"
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#include "database/Session.hpp"
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#include "database/Track.hpp"
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#include "IdTypeTraits.hpp"
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#include "SqlQuery.hpp"
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#include "StringViewTraits.hpp"
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#include "Utils.hpp"
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namespace lms::db
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{
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namespace
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{
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template<typename ResultType>
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Wt::Dbo::Query<ResultType> createQuery(Session& session, std::string_view itemToSelect, const Cluster::FindParameters& params)
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{
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session.checkReadTransaction();
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auto query{ session.getDboSession()->query<ResultType>("SELECT " + std::string{ itemToSelect } + " FROM cluster c") };
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query.groupBy("c.id");
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if (params.track.isValid() || params.release.isValid())
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query.join("track_cluster t_c ON t_c.cluster_id = c.id");
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if (!params.clusterTypeName.empty())
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query.join("cluster_type c_t ON c_t.id = c.cluster_type_id");
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if (params.track.isValid())
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query.where("t_c.track_id = ?").bind(params.track);
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if (params.release.isValid())
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{
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query.join("track t ON t.id = t_c.track_id");
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query.where("t.release_id = ?").bind(params.release);
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}
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assert(!params.clusterType.isValid() || params.clusterTypeName.empty());
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if (params.clusterType.isValid())
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query.where("+c.cluster_type_id = ?").bind(params.clusterType); // Exclude this since the query planner does not do a good job when db is not analyzed
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else if (!params.clusterTypeName.empty())
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query.where("c_t.name = ?").bind(params.clusterTypeName);
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switch (params.sortMethod)
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{
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case ClusterSortMethod::None:
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break;
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case ClusterSortMethod::Name:
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query.orderBy("c.name COLLATE NOCASE");
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break;
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}
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query.groupBy("c.id");
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return query;
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}
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template<typename ResultType>
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Wt::Dbo::Query<ResultType> createQuery(Session& session, const Cluster::FindParameters& params)
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{
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std::string_view itemToSelect;
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if constexpr (std::is_same_v<ResultType, ClusterId>)
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itemToSelect = "c.id";
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else if constexpr (std::is_same_v<ResultType, Wt::Dbo::ptr<Cluster>>)
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itemToSelect = "c";
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else
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static_assert("Unhandled type");
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return createQuery<ResultType>(session, itemToSelect, params);
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}
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} // namespace
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Cluster::Cluster(ObjectPtr<ClusterType> type, std::string_view name)
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: _name{ name }
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, _clusterType{ getDboPtr(type) }
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{
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// As we use the name to uniquely identify clusters and cluster types, we must throw (and not truncate)
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if (name.size() > maxNameLength)
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throw Exception{ "Cluster name is too long: " + std::string{ name } + "'" };
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}
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Cluster::pointer Cluster::create(Session& session, ObjectPtr<ClusterType> type, std::string_view name)
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{
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return session.getDboSession()->add(std::unique_ptr<Cluster>{ new Cluster{ type, name } });
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}
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std::size_t Cluster::getCount(Session& session)
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{
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session.checkReadTransaction();
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return utils::fetchQuerySingleResult(session.getDboSession()->query<int>("SELECT COUNT(*) FROM cluster"));
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}
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RangeResults<ClusterId> Cluster::findIds(Session& session, const FindParameters& params)
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{
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session.checkReadTransaction();
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auto query{ createQuery<ClusterId>(session, params) };
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return utils::execRangeQuery<ClusterId>(query, params.range);
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}
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RangeResults<Cluster::pointer> Cluster::find(Session& session, const FindParameters& params)
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{
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session.checkReadTransaction();
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auto query{ createQuery<Wt::Dbo::ptr<Cluster>>(session, params) };
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return utils::execRangeQuery<Cluster::pointer>(query, params.range);
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}
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void Cluster::find(Session& session, const FindParameters& params, std::function<void(const pointer& cluster)> _func)
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{
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session.checkReadTransaction();
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auto query{ createQuery<Wt::Dbo::ptr<Cluster>>(session, params) };
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return utils::forEachQueryResult(query, _func);
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}
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RangeResults<ClusterId> Cluster::findOrphanIds(Session& session, std::optional<Range> range)
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{
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session.checkReadTransaction();
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auto query{ session.getDboSession()->query<ClusterId>("SELECT DISTINCT c.id FROM cluster c WHERE NOT EXISTS(SELECT 1 FROM track_cluster t_c WHERE t_c.cluster_id = c.id)") };
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return utils::execRangeQuery<ClusterId>(query, range);
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}
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Cluster::pointer Cluster::find(Session& session, ClusterId id)
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{
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session.checkReadTransaction();
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return utils::fetchQuerySingleResult(session.getDboSession()->find<Cluster>().where("id = ?").bind(id));
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}
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std::size_t Cluster::computeTrackCount(Session& session, ClusterId id)
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{
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session.checkReadTransaction();
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return utils::fetchQuerySingleResult(session.getDboSession()->query<int>("SELECT COUNT(t.id) FROM track t INNER JOIN track_cluster t_c ON t_c.track_id = t.id").where("t_c.cluster_id = ?").bind(id));
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}
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std::size_t Cluster::computeReleaseCount(Session& session, ClusterId id)
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{
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session.checkReadTransaction();
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return utils::fetchQuerySingleResult(session.getDboSession()->query<int>("SELECT COUNT(DISTINCT r.id) FROM release r INNER JOIN track t on t.release_id = r.id INNER JOIN track_cluster t_c ON t_c.track_id = t.id").where("t_c.cluster_id = ?").bind(id));
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}
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void Cluster::addTrack(ObjectPtr<Track> track)
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{
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_tracks.insert(getDboPtr(track));
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}
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RangeResults<TrackId> Cluster::getTracks(std::optional<Range> range) const
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{
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assert(session());
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auto query{ session()->query<TrackId>("SELECT t.id FROM track t INNER JOIN cluster c ON c.id = t_c.cluster_id INNER JOIN track_cluster t_c ON t_c.track_id = t.id").where("c.id = ?").bind(getId()) };
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return utils::execRangeQuery<TrackId>(query, range);
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}
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ClusterType::ClusterType(std::string_view name)
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: _name{ name }
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{
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// As we use the name to uniquely identify clusters and cluster types, we must throw
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if (name.size() > maxNameLength)
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throw Exception{ "ClusterType name is too long: " + std::string{ name } + "'" };
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}
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ClusterType::pointer ClusterType::create(Session& session, std::string_view name)
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{
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return session.getDboSession()->add(std::unique_ptr<ClusterType>{ new ClusterType{ name } });
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}
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std::size_t ClusterType::getCount(Session& session)
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{
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session.checkReadTransaction();
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return utils::fetchQuerySingleResult(session.getDboSession()->query<int>("SELECT COUNT(*) FROM cluster_type"));
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}
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RangeResults<ClusterTypeId> ClusterType::findOrphanIds(Session& session, std::optional<Range> range)
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{
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session.checkReadTransaction();
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auto query{ session.getDboSession()->query<ClusterTypeId>(
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"SELECT c_t.id from cluster_type c_t"
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" LEFT OUTER JOIN cluster c ON c_t.id = c.cluster_type_id")
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.where("c.id IS NULL") };
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return utils::execRangeQuery<ClusterTypeId>(query, range);
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}
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RangeResults<ClusterTypeId> ClusterType::findUsed(Session& session, std::optional<Range> range)
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{
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session.checkReadTransaction();
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auto query{ session.getDboSession()->query<ClusterTypeId>(
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"SELECT DISTINCT c_t.id from cluster_type c_t")
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.join("cluster c ON c_t.id = c.cluster_type_id") };
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return utils::execRangeQuery<ClusterTypeId>(query, range);
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}
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void ClusterType::find(Session& session, const std::function<void(const pointer&)>& func)
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{
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auto query{ session.getDboSession()->find<ClusterType>() };
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return utils::forEachQueryResult(query, func);
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}
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ClusterType::pointer ClusterType::find(Session& session, std::string_view name)
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{
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session.checkReadTransaction();
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if (name.size() > maxNameLength)
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throw Exception{ "Requested ClusterType name is too long: " + std::string{ name } + "'" };
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return utils::fetchQuerySingleResult(session.getDboSession()->find<ClusterType>().where("name = ?").bind(name));
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}
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ClusterType::pointer ClusterType::find(Session& session, ClusterTypeId id)
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{
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session.checkReadTransaction();
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return utils::fetchQuerySingleResult(session.getDboSession()->find<ClusterType>().where("id = ?").bind(id));
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}
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RangeResults<ClusterTypeId> ClusterType::findIds(Session& session, std::optional<Range> range)
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{
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session.checkReadTransaction();
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auto query{ session.getDboSession()->query<ClusterTypeId>("SELECT id from cluster_type") };
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return utils::execRangeQuery<ClusterTypeId>(query, range);
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}
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Cluster::pointer ClusterType::getCluster(const std::string& name) const
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{
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assert(self());
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assert(session());
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if (name.size() > Cluster::maxNameLength)
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throw Exception{ "Requested Cluster name is too long: " + std::string{ name } + "'" };
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return utils::fetchQuerySingleResult(session()->find<Cluster>().where("name = ?").bind(name).where("cluster_type_id = ?").bind(getId()));
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}
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std::vector<Cluster::pointer> ClusterType::getClusters() const
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{
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assert(self());
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assert(session());
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return utils::fetchQueryResults<Cluster::pointer>(session()->find<Cluster>().where("cluster_type_id = ?").bind(getId()).orderBy("name"));
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}
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} // namespace lms::db
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