How can i get a field from a json Object and assign it to my model field

[YawarOsman]

I have this json:

{
  'teacherName': 'teacher 1',
  'Major': {
  'majorName': 'physics'
}

}

And i want to create a model like this:

TeacherModel({
required String teacherName,
required String majorName
})

How can i implement that? without creating a new model for Major?

[YawarOsman]

I solved it like this:

 const factory TeacherModel({
     required String teacherName,
    required @JsonKey(name: 'majorName', readValue: _getFieldFromJson) String majorName,
  }) = _TeacherModel;

  factory TeacherModel.fromJson(Map<String, dynamic> json) =>
      _$TeacherModelFromJson(json);
}

String? _getFieldFromJson(Map json, String key) {
  return json['Major'][key];
}