Unhandled Exception: type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'OriginDestination' in type cast int flutter

I am trying to fetch data from a local json file in my assets. I received and decoded data and then tried to store it in a list for further use. But it give me the exception. I want the list to be of type OriginDestination, store it in database and then use it further. Can someone please tell me how can I parse data from json to OriginDestination.

Class OriginDestination –

OriginDestination cityDtoFromJson(String str) => OriginDestination.fromJson(json.decode(str));

String cityDtoToJson(OriginDestination data) => json.encode(data.toJson());

@HiveType(typeId: 0)
// ignore: non_constant_identifier_names
class OriginDestination extends HiveObject {

  @HiveField(0)
  City? origin;

  @HiveField(1)
  List<City>? destinations;

  OriginDestination({
    this.origin,
    this.destinations,
  });

  factory OriginDestination.fromJson(Map<String, dynamic> json) => OriginDestination(
    origin: City.fromJson(json["origin"]),
    destinations: List<City>.from(
        json["destinations"].map((x) => City.fromJson(x))),
  );

  Map<String, dynamic> toJson() => {
    "origin": origin,
    "destinations": destinations,
  };

Code where I am fetching data and want to use it (originDestinations is also a list of type OriginDestination) –

List<OriginDestination>? localOriginDestination = [];

  Future<void> readJson() async {
    final String response = await rootBundle.loadString('assets/files/node.json');
    final data = await json.decode(response);
    localOriginDestination = await data["data"].cast<OriginDestination>();
    print(localOriginDestination);
    if(localOriginDestination!=null) {
      await _localStorageService.getBox().clear();
      await _localStorageService.getBox().addAll(localOriginDestination!.toList());
      originDestinations = _localStorageService.getOriginDestinations();
    }
  }

>Solution :

I have never used Hive before but this line of code seems suspicious to me:

localOriginDestination = await data["data"].cast<OriginDestination>();

I think you want to do something along the lines of:

localOriginDestination = [
  for (final element in await data['data']) OriginDestination.fromJson(element),
];

But I can’t be entirely certain without knowing what the value of await data['data'] is.