add basic foreigh key stuff

model/model.go

@@ -7,14 +7,14 @@ type Album struct {
 	IDBase
 	CrudBase
 	AlbumArtist   AlbumArtist
-	AlbumArtistID int    `gorm:"index"`
+	AlbumArtistID int    `gorm:"index" sql:"type:int REFERENCES album_artists(id) ON DELETE CASCADE"`
 	Title         string `gorm:"not null;index"`
 	// an Album having a `Path` is a little weird when browsing by tags
 	// (for the most part - the library's folder structure is treated as
 	// if it were flat), but this solves the "American Football problem"
 	// https://en.wikipedia.org/wiki/American_Football_(band)#Discography
 	Path    string `gorm:"not null;unique_index"`
-	CoverID int
+	CoverID int    `sql:"type:int REFERENCES covers(id)"`
 	Cover   Cover
 	Year    int
 	Tracks  []Track
@@ -24,8 +24,8 @@ type Album struct {
 type AlbumArtist struct {
 	IDBase
 	CrudBase
-	Albums []Album
 	Name   string `gorm:"not null;unique_index"`
+	Albums []Album
 }
 
 // Track represents the tracks table
@@ -33,9 +33,9 @@ type Track struct {
 	IDBase
 	CrudBase
 	Album         Album
-	AlbumID       int `gorm:"index"`
+	AlbumID       int `gorm:"index" sql:"type:int REFERENCES albums(id) ON DELETE CASCADE"`
 	AlbumArtist   AlbumArtist
-	AlbumArtistID int
+	AlbumArtistID int `gorm:"index" sql:"type:int REFERENCES album_artists(id) ON DELETE CASCADE"`
 	Artist        string
 	Bitrate       int
 	Codec         string
@@ -50,7 +50,7 @@ type Track struct {
 	ContentType   string
 	Size          int
 	Folder        Folder
-	FolderID      int
+	FolderID      int    `gorm:"not null;index" sql:"type:int REFERENCES folders(id) ON DELETE CASCADE"`
 	Path          string `gorm:"not null;unique_index"`
 }
 

scanner/scanner.go

@@ -224,27 +224,19 @@ func (s *Scanner) handleItem(fullPath string, info *godirwalk.Dirent) error {
 
 func (s *Scanner) MigrateDB() error {
 	defer logElapsed(time.Now(), "migrating database")
+	s.db.Exec("PRAGMA foreign_keys = ON")
 	s.tx = s.db.Begin()
 	defer s.tx.Commit()
 	s.tx.AutoMigrate(
-		&model.Album{},
-		&model.AlbumArtist{},
-		&model.Track{},
-		&model.Cover{},
-		&model.User{},
-		&model.Setting{},
-		&model.Play{},
-		&model.Folder{},
+		model.Album{},
+		model.AlbumArtist{},
+		model.Track{},
+		model.Cover{},
+		model.User{},
+		model.Setting{},
+		model.Play{},
+		model.Folder{},
 	)
-	// set starting value for `albums` table's
-	// auto increment
-	s.tx.Exec(`
-        INSERT INTO sqlite_sequence(name, seq)
-        SELECT 'albums', 500000
-        WHERE  NOT EXISTS (SELECT *
-                           FROM   sqlite_sequence);
-       `)
-	// create the first user if there is none
 	s.tx.FirstOrCreate(&model.User{}, model.User{
 		Name:     "admin",
 		Password: "admin",
@@ -260,6 +252,7 @@ func (s *Scanner) Start() error {
 	atomic.StoreInt32(&IsScanning, 1)
 	defer atomic.StoreInt32(&IsScanning, 0)
 	defer logElapsed(time.Now(), "scanning")
+	s.db.Exec("PRAGMA foreign_keys = ON")
 	s.tx = s.db.Begin()
 	defer s.tx.Commit()
 	//