[Database] Remove orphaned objects. Added helpers to access releases and artists

src/database/Artist.cpp

@@ -84,6 +84,18 @@ Artist::getByFilter(Wt::Dbo::Session& session, SearchFilter filter, int offset,
 	return std::vector<pointer>(res.begin(), res.end());
 }
 
+std::vector<Wt::Dbo::ptr<Release> >
+Artist::getReleases()
+{
+	assert(self());
+	assert(self()->id() != Wt::Dbo::dbo_traits<Artist>::invalidId() );
+	assert(session());
+
+	Wt::Dbo::collection< Wt::Dbo::ptr<Release> > res = session()->query<Wt::Dbo::ptr<Release> >("SELECT r FROM release r INNER JOIN artist a ON t.artist_id = a.id INNER JOIN track t ON t.release_id = r.id").where("a.id = ?").bind(id());
+
+	return std::vector< Wt::Dbo::ptr<Release> > (res.begin(), res.end());
+}
+
 Wt::Dbo::Query<Artist::pointer>
 Artist::getQuery(Wt::Dbo::Session& session, SearchFilter filter)
 {

src/database/Artist.hpp

@@ -33,8 +33,9 @@ namespace Database
 
 class Track;
 class Genre;
+class Release;
 
-class Artist
+class Artist : public Wt::Dbo::Dbo<Artist>
 {
 	public:
 
@@ -58,6 +59,9 @@ class Artist
 		std::string getName(void) const { return _name; }
 		std::string getMBID(void) const { return _MBID; }
 
+		// Get the releases that have at least one track for this artist
+		std::vector<Wt::Dbo::ptr<Release> >	getReleases();
+
 		void setMBID(std::string mbid) { _MBID = mbid; }
 
 		// Create

src/database/Release.cpp

@@ -71,7 +71,7 @@ Release::getAll(Wt::Dbo::Session& session, int offset, int size)
 std::vector<Release::pointer>
 Release::getAllOrphans(Wt::Dbo::Session& session)
 {
-	Wt::Dbo::collection<Release::pointer> res = session.query< Wt::Dbo::ptr<Release> >("select a from artist a LEFT OUTER JOIN Track t ON a.id = t.artist_id WHERE t.id IS NULL");
+	Wt::Dbo::collection<Release::pointer> res = session.query< Wt::Dbo::ptr<Release> >("select r from release r LEFT OUTER JOIN Track t ON r.id = t.release_id WHERE t.id IS NULL");
 
 	return std::vector<pointer>(res.begin(), res.end());
 }
@@ -129,4 +129,16 @@ Release::getByFilter(Wt::Dbo::Session& session, SearchFilter filter, int offset,
 	return std::vector<pointer>(res.begin(), res.end());
 }
 
+std::vector< Wt::Dbo::ptr<Artist> >
+Release::getArtists()
+{
+	assert(self());
+	assert(self()->id() != Wt::Dbo::dbo_traits<Release>::invalidId() );
+	assert(session());
+
+	Wt::Dbo::collection< Wt::Dbo::ptr<Artist> > res = session()->query<Wt::Dbo::ptr<Artist> >("SELECT a FROM artist a INNER JOIN release r ON r.id = t.release_id INNER JOIN track t ON t.release_id = r.id").where("r.id = ?").bind(id());
+
+	return std::vector< Wt::Dbo::ptr<Artist> > (res.begin(), res.end());
+}
+
 } // namespace Database

src/database/Release.hpp

@@ -29,8 +29,9 @@ namespace Database
 {
 
 class Track;
+class Release;
 
-class Release
+class Release : public Wt::Dbo::Dbo<Release>
 {
 	public:
 
@@ -64,6 +65,8 @@ class Release
 		std::string	getMBID() const		{ return _MBID; }
 		bool		isNone(void) const;
 		boost::posix_time::time_duration getDuration(void) const;
+		std::vector<Wt::Dbo::ptr<Artist> >	getArtists();	// Get the artists of this release
+		std::vector<Wt::Dbo::ptr<Track> >	getTracks();	// Get the tracks of this release
 
 		void setMBID(std::string mbid) { _MBID = mbid; }
 

src/database/Track.cpp

@@ -152,11 +152,10 @@ Genre::Genre(const std::string& name)
 {
 }
 
-std::vector<Genre::pointer>
-Genre::getAll(Wt::Dbo::Session& session, int offset, int size)
+Wt::Dbo::collection<Genre::pointer>
+Genre::getAll(Wt::Dbo::Session& session)
 {
-	Wt::Dbo::collection<pointer> res = session.find<Genre>().offset(offset).limit(size);
-	return std::vector<Genre::pointer>(res.begin(), res.end());
+	return session.find<Genre>();
 }
 
 Genre::pointer

src/database/Track.hpp

@@ -52,7 +52,7 @@ class Genre
 		static pointer getByName(Wt::Dbo::Session& session, const std::string& name);
 		static pointer getNone(Wt::Dbo::Session& session);
 		static std::vector<pointer> getByFilter(Wt::Dbo::Session& session, SearchFilter filter, int offset = -1, int size = -1);
-		static std::vector<pointer> getAll(Wt::Dbo::Session& session, int offset = -1, int size = -1);
+		static Wt::Dbo::collection<pointer> getAll(Wt::Dbo::Session& session);
 
 		// MVC models for the user interface
 		// Genre ID, name, track count