add init migrattions

db/db.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/jinzhu/gorm"
 	"github.com/pkg/errors"
+	"gopkg.in/gormigrate.v1"
 )
 
 var (
@@ -35,12 +36,14 @@ func New(path string) (*DB, error) {
 	db.SetLogger(log.New(os.Stdout, "gorm ", 0))
 	db.DB().SetMaxOpenConns(dbMaxOpenConns)
 	db.Exec("PRAGMA journal_mode=WAL;")
-	// TODO: don't log if user already exists
-	db.FirstOrCreate(&User{}, User{
-		Name:     "admin",
-		Password: "admin",
-		IsAdmin:  true,
+	migr := gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
+		&migrationCreateInitUser,
+		&migrationInitSchema,
+		&migrationMergePlaylist,
 	})
+	if err = migr.Migrate(); err != nil {
+		return nil, errors.Wrap(err, "migrating to latest version")
+	}
 	return &DB{DB: db}, nil
 }
 

db/migrations.go

@@ -1 +1,66 @@
+//nolint:deadcode,varcheck
 package db
+
+import (
+	"github.com/jinzhu/gorm"
+	"gopkg.in/gormigrate.v1"
+)
+
+var migrationCreateInitUser = gormigrate.Migration{
+	ID: "202002192019",
+	Migrate: func(tx *gorm.DB) error {
+		const (
+			initUsername = "admin"
+			initPassword = "admin"
+		)
+		err := tx.
+			Where("name = ?", initUsername).
+			First(&User{}).
+			Error
+		if gorm.IsRecordNotFoundError(err) {
+			tx.Create(&User{
+				Name:     initUsername,
+				Password: initPassword,
+				IsAdmin:  true,
+			})
+			return nil
+		}
+		return err
+	},
+}
+
+var migrationInitSchema = gormigrate.Migration{
+	ID: "202002192100",
+	Migrate: func(tx *gorm.DB) error {
+		return tx.AutoMigrate(
+			Artist{},
+			Track{},
+			User{},
+			Setting{},
+			Play{},
+			Album{},
+			Playlist{},
+			PlayQueue{},
+		).
+			Error
+	},
+}
+
+var migrationMergePlaylist = gormigrate.Migration{
+	ID: "202002192222",
+	Migrate: func(tx *gorm.DB) error {
+		return tx.Exec(`
+			UPDATE playlists
+			SET items = (
+				SELECT group_concat(track_id) FROM (
+					SELECT track_id
+					FROM playlist_items
+					WHERE playlist_items.playlist_id=playlists.id
+					ORDER BY created_at
+				)
+			);
+			DROP TABLE playlist_items;`,
+		).
+			Error
+	},
+}