错误类型'String'不是强制类型转换flf sqflite中'num'类型的子类型

Question

我使用以下代码在sqflite数据库中进行搜索

    Future<Albums> getAlbumSearch([String search]) async {
    var dbClient = await db;
    // specify the column names you want in the result set
    List<Map> maps =

    await dbClient.rawQuery("SELECT * FROM $TABLE WHERE $TITLE LIKE '%${search}%' ");

    Albums allAlbums = Albums();
    List<Album> albums = [];
    if (maps.length > 0) {
      for (int i = 0; i < maps.length; i++) {
        albums.add(Album.fromJson(maps[i]));
      }
    }
    allAlbums.albums = albums;
    return allAlbums;
}

但是它在应用程序中给了我这个错误：错误类型'String'不是强制类型转换中'num'类型的子类型

我该如何解决？

我的相册和相册课程

    class Album {
    Album();

    num albumId;
    num id;
    String title;
    String url;
    String thumbnailUrl;

    factory Album.fromJson(Map<String,dynamic> json) => _$AlbumFromJson(json);
    Map<String, dynamic> toJson() => _$AlbumToJson(this);
}

    class Albums {
    Albums();

    List<Album> albums;

    factory Albums.fromJson(Map<String,dynamic> json) => _$AlbumsFromJson(json);
    Map<String, dynamic> toJson() => _$AlbumsToJson(this);
}