实现音频服务api

internal/repository/media_repo.go

@@ -0,0 +1,26 @@
+package repository
+
+import "database/sql"
+
+type MediaRepository struct {
+	db *sql.DB
+}
+
+func NewMediaRepository(db *sql.DB) *MediaRepository {
+	return &MediaRepository{db: db}
+}
+
+func (r *MediaRepository) Get(id int) (MediaFile, error) {
+	var m MediaFile
+	rows, err := r.db.Query("SELECT id, path, library_id FROM media_files WHERE id = $1", id)
+	if err != nil {
+		return MediaFile{}, err
+	}
+	defer rows.Close()
+	if rows.Next() {
+		if err := rows.Scan(&m.ID, &m.Path, &m.LibraryID); err != nil {
+			return MediaFile{}, err
+		}
+	}
+	return m, nil
+}