mobile-app/lib/custom_model/Disease.dart

class Disease {
  int id;
  int cropId;
  String executeDate;
  String description;
  List<ObjectUpdateDetail> objectUpdateDetail;

  Disease(
      {this.id,
      this.cropId,
      this.executeDate,
      this.description,
      this.objectUpdateDetail});

  Disease.fromJson(Map<String, dynamic> json) {
    id = json['id'];
    cropId = json['cropId'];
    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['id'] = this.id;
    data['cropId'] = this.cropId;
    data['executeDate'] = this.executeDate;
    data['description'] = this.description;
    if (this.objectUpdateDetail != null) {
      data['objectUpdateDetail'] =
          this.objectUpdateDetail.map((v) => v.toJson()).toList();
    }
    return data;
  }
}

class ObjectUpdateDetail {
  int id;
  String name;
  int index;

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

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

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