fromJson static method

Genre? fromJson(dynamic value)

Returns a new Genre instance and imports its values from value if it's a Map, null otherwise.

Implementation

// ignore: prefer_constructors_over_static_methods
static Genre? fromJson(dynamic value) {
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      requiredKeys.forEach((key) {
        assert(json.containsKey(key), 'Required key "Genre[$key]" is missing from JSON.');
        assert(json[key] != null, 'Required key "Genre[$key]" has a null value in JSON.');
      });
      return true;
    }());

    return Genre(
      genreId: mapValueOfType<int>(json, r'GenreId'),
      name: mapValueOfType<String>(json, r'Name')!,
      createDate: mapDateTime(json, r'CreateDate', ''),
      changeDate: mapDateTime(json, r'ChangeDate', ''),
      genreTracks: GenreTrack.listFromJson(json[r'GenreTracks']) ?? const [],
      genreSelections: GenreSelection.listFromJson(json[r'GenreSelections']) ?? const [],
      genrePlaylists: GenrePlaylist.listFromJson(json[r'GenrePlaylists']) ?? const [],
    );
  }
  return null;
}