feat: add CreatedAt to albums (#159)

This change will make the GetAlbumList views with the "newest" type
work as expected.

server/db/db.go

@@ -82,6 +82,7 @@ func New(path string) (*DB, error) {
 		migratePodcast(),
 		migrateBookmarks(),
 		migratePodcastAutoDownload(),
+		migrateAlbumCreatedAt(),
 	))
 	if err = migr.Migrate(); err != nil {
 		return nil, fmt.Errorf("migrating to latest version: %w", err)

server/db/migrations.go

@@ -262,3 +262,24 @@ func migratePodcastAutoDownload() gormigrate.Migration {
 		},
 	}
 }
+
+func migrateAlbumCreatedAt() gormigrate.Migration {
+	return gormigrate.Migration{
+		ID: "202110041330",
+		Migrate: func(tx *gorm.DB) error {
+			step := tx.AutoMigrate(
+				Album{},
+			)
+			if err := step.Error; err != nil {
+				return fmt.Errorf("step auto migrate: %w", err)
+			}
+			step = tx.Exec(`
+				UPDATE albums SET created_at=modified_at;
+			`)
+			if err := step.Error; err != nil {
+				return fmt.Errorf("step migrate album created_at: %w", err)
+			}
+			return nil
+		},
+	}
+}

server/db/model.go

@@ -179,6 +179,7 @@ type Play struct {
 
 type Album struct {
 	ID            int `gorm:"primary_key"`
+	CreatedAt     time.Time
 	UpdatedAt     time.Time
 	ModifiedAt    time.Time
 	LeftPath      string `gorm:"unique_index:idx_left_path_right_path"`