Flutter 未处理的异常：DioError[DioErrorType.DEFAULT]：将对象转换为可编码对象失败：实例'；日期时间'；

我试图发送多个对象，我想通过dio发送，当我尝试这个我得到

未处理的异常：DioError[DioErrorType.DEFAULT]：正在转换 对象到可编码对象失败。“DateTime”的实例

我也尝试过将对象转换为Json，但仍然会出现其他错误

我的模型

BasicInfoModel basicInfoModelFromJson(String str) => BasicInfoModel.fromJson(json.decode(str));

String basicInfoModelToJson(BasicInfoModel data) => json.encode(data.toJson());

class BasicInfoModel {
  BasicInfoModel({
    this.id,
    this.monitorName,
    this.monitorPhoneno,
    this.fieldleadEmpno,
    this.fieldleadName,
    this.fieldleadPhone,
    this.fieldteamId,
    this.ea,
    this.district,
    this.region,
    this.date,
    this.timeStarted,
    this.timeEnded,
  });

  String id;
  String monitorName;
  String monitorPhoneno;
  String fieldleadEmpno;
  String fieldleadName;
  String fieldleadPhone;
  String fieldteamId;
  String ea;
  String district;
  String region;
  DateTime date;
  String timeStarted;
  String timeEnded;

  factory BasicInfoModel.fromJson(Map<String, dynamic> json) => BasicInfoModel(
    id: json["id"],
    monitorName: json["monitorName"],
    monitorPhoneno: json["monitorPhoneno"],
    fieldleadEmpno: json["fieldleadEmpno"],
    fieldleadName: json["fieldleadName"],
    fieldleadPhone: json["fieldleadPhone"],
    fieldteamId: json["fieldteamId"],
    ea: json["ea"],
    district: json["district"],
    region: json["region"],
    date: DateTime.parse(json["date"]),
    timeStarted: json["timeStarted"],
    timeEnded: json["timeEnded"],
  );

  Map<String, dynamic> toJson() => {
    "id": id,
    "monitorName": monitorName,
    "monitorPhoneno": monitorPhoneno,
    "fieldleadEmpno": fieldleadEmpno,
    "fieldleadName": fieldleadName,
    "fieldleadPhone": fieldleadPhone,
    "fieldteamId": fieldteamId,
    "ea": ea,
    "district": district,
    "region": region,
    "date": date.toIso8601String(),
    "timeStarted": timeStarted,
    "timeEnded": timeEnded,
  };
}

我正在提取的json字符串

[{type: Input, label: Monitor Name, required: true, value: re}, {type: Numeric, label: Monitor Phone No(s), required: true, value: 087}, {type: Numeric, label: Field Team ID*, required: true, value: yt}, {type: Input, label: Field Team Lead Name, required: true, value: yh}, {type: Numeric, label: Field Team Phone No, required: true, value: 89}, {type: Numeric, label: Field Team Employee No, required: true, value: 89}, {type: Input, label: EA*, required: true, value: yh}, {type: Input, label: District*, required: true, value: gy}, {type: Input, label: Region, required: true, value: g}, {type: Input, label: Time started, required: true, value: g}, {type: Input, label: Time ended, required: true, value: b}, {type: DatePicker, label: Date, required: true, value:  2020-11-14 18:32:06.176338}]

json[“date”]

看起来怎么样？如果它的null或值无法正确解析，它将抛出FormatException

首先尝试检查空值：

date: json["date"] == null ? null : DateTime.parse(json["date"]),

---

还要检查json[“date”]的格式，可能是从Epoch开始的毫秒数

Hi@EdwynZN这是json它不是empy

{type:DatePicker，label:date，required:true，value:2020-11-13 08:06:18.99}

它有毫秒我不完全理解，它是一个带有一个名为“value”的键的映射，在一个日期字符串中，键“date”在哪里？我已经共享了整个json字符串我没有看到响应、BasicInfo模型和提取值之间的关系，在您询问响应是否为DateTime类型的日期中，返回它的值，否则返回…它的值？但很明显，该值不会被解释为第二个选项的日期时间。如果是字符串，请将其作为final date=responses[0]['fields'][11]['value']运行；并检查其类型

timeStarted

和

timeEnded

的类型是什么？它们是

DateTime

的对象吗？不，它们不是@RaviSinghLodhi

字符串basicInfoModelToJson（basicinfomodeldata）=>json.encode（data.toJson（））

将此函数转换为块函数：

String basicInfoModelToJson（BasicInfoModel数据）{String json=data.toJson（）；print（json）；尝试{return json.encode（data.toJson（））；}catch（e）{print（e.toString（））；}}

也尝试调试以确定是哪个参数导致此问题。Hi RaviSinghLodhi

date: json["date"] == null ? null : DateTime.parse(json["date"]),