mobile-app/lib/custom_model/RequestGeneralModel.dart

class RequestGeneralModel {
  int cropId;
  int activityId;
  String executeDate;
  String description;
  List<String> mediaDel;
  List<ObjectUpdateDetail> objectUpdateDetail;

  RequestGeneralModel(
      {this.cropId,
      this.activityId,
      this.executeDate,
      this.description,
      this.mediaDel,
      this.objectUpdateDetail});

  RequestGeneralModel.fromJson(Map<String, dynamic> json) {
    cropId = json['cropId'];
    activityId = json['activityId'];
    executeDate = json['executeDate'];
    description = json['description'];
    if (json['objectUpdateDetail'] != null) {
      objectUpdateDetail = new List<ObjectUpdateDetail>();
      json['objectUpdateDetail'].forEach((v) {
        objectUpdateDetail.add(new ObjectUpdateDetail.fromJson(v));
      });
    }
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['cropId'] = this.cropId;
    data['activityId'] = this.activityId;
    data['executeDate'] = this.executeDate;
    data['description'] = this.description;
    data['media_del'] = this.mediaDel;
    if (this.objectUpdateDetail != null) {
      data['objectUpdateDetail'] =
          this.objectUpdateDetail.map((v) => v.toJson()).toList();
    }
    return data;
  }
}

class ObjectUpdateDetail {
  String name;
  String index;

  ObjectUpdateDetail({this.name, this.index});

  ObjectUpdateDetail.fromJson(Map<String, dynamic> json) {
    name = json['name'];
    index = json['index'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['name'] = this.name;
    data['index'] = this.index;
    return data;
  }
}