如何在Flutter 中将列表的模型类型转换为数组

我有名单的型号类型，该名单是用来收集用户的ID和专业. SpecialityList是一个列表.

var specialityList = <SpecialityDatum>[].obs;

SpecialityDatum is Model，

class SpecialityDatum {
  SpecialityDatum({
     this.id,
     this.speciality,
     this.status,
    this.createdAt,
    this.updatedAt,
    this.deletedAt,
  });

  int? id;
  String? speciality;
  int? status;
  DateTime? createdAt;
  DateTime? updatedAt;
  dynamic deletedAt;

  factory SpecialityDatum.fromJson(Map<String, dynamic> json) => SpecialityDatum(
    id: json["id"]??0,
    speciality: json["speciality"]??"",
    status: json["status"]??"",
    createdAt: json["created_at"] != null ? DateTime.parse(json["created_at"]) : null,
    updatedAt: json["updated_at"] != null ? DateTime.parse(json["updated_at"]) : null,
    deletedAt: json["deleted_at"],
  );

  Map<String, dynamic> toJson() => {
    "id": id,
    "speciality": speciality,
    "status": status,
    "created_at": createdAt,
    "updated_at": updatedAt,
    "deleted_at": deletedAt,
  };

  String toStringView(){ // what ever you name it
    return '$speciality'; // if you want to show id and speciality as string
  }

}

我想将该模型列表转换为数组，如下所示.

Output : [{"speciality_id":12,"speciality_name":"orthopedic"},{"speciality_id":13,"speciality_name":"hyoerthing"}]