Question

仅在第一次保存对象列表时出现此错误是否有意义？当我将另一个对象添加到列表中时，相同的代码运行没有错误。有没有我遗漏的小技巧？

<块引用>

E/flutter (6026): [错误:flutter/lib/ui/ui_dart_state.cc(186)] 未处理的异常：将对象转换为可编码对象失败： 'Proje' E/flutter 实例（6026）：#0
_JsonStringifier.writeObject (dart:convert/json.dart:688:7) E/flutter (6026): #1 _JsonStringifier.writeList (dart:convert/json.dart:736:7) E/flutter (6026): #2
_JsonStringifier.writeJsonValue (dart:convert/json.dart:718:7) E/flutter (6026): #3 _JsonStringifier.writeObject (dart:convert/json.dart:679:9) E/flutter (6026): #4
_JsonStringifier.writeMap (dart:convert/json.dart:769:7) E/flutter (6026): #5 _JsonStringifier.writeJsonValue (dart:convert/json.dart:724:21) E/flutter (6026): #6
_JsonStringifier.writeObject (dart:convert/json.dart:679:9) E/flutter (6026): #7 _JsonStringStringifier.printOn (dart:convert/json.dart:877:17) E/flutter (6026): #8
_JsonStringStringifier.stringify (dart:convert/json.dart:862:5) E/flutter (6026): #9 JsonEncoder.convert (dart:convert/json.dart:262:30) E/flutter (6026): #10
JsonCodec.encode (dart:convert/json.dart:172:45) E/flutter (6026)： #11 StorageImpl.flush (package:get_storage/src/storage/io.dart:34:37) E/flutter (6026): #12 GetStorage._flush (包:get_storage/src/storage_impl.dart:144:23) E/flutter（6026）：#13 GetQueue._check (package:get/get_utils/src/queue/get_queue.dart:31:47) E/flutter ( 6026）：#14 GetQueue.add (package:get/get_utils/src/queue/get_queue.dart:43:5) E/flutter ( 6026）：#15 GetStorage._addToQueue （包：get_storage/src/storage_impl.dart:139:18）E/flutter（6026）： #16 微任务.exec。（包：get_storage/src/storage_impl.dart:174:17）E/flutter（6026）： #17 _rootRun (dart:async/zone.dart:1346:47) E/flutter (6026): #18 _CustomZone.run (dart:async/zone.dart:1258:19) E/flutter (6026): #19 _CustomZone.runGuarded (dart:async/zone.dart:1162:7) E/flutter (6026)：#20 _CustomZone.bindCallbackGuarded。 (dart:async/zone.dart:1202:23) E/flutter (6026): #21 _rootRun (dart:async/zone.dart:1354:13) E/flutter ( 6026): #22
_CustomZone.run (dart:async/zone.dart:1258:19) E/flutter (6026): #23 _CustomZone.runGuarded (dart:async/zone.dart:1162:7) E/flutter (6026): #24 _CustomZone.bindCallbackGuarded。 (dart:async/zone.dart:1202:23) E/flutter ( 6026): #25
_microtaskLoop (dart:async/schedule_microtask.dart:40:21) E/flutter (6026): #26 _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)

这里是类文件：

class Proje {
  int id;
  String title;
  int tahminiButce;

  Proje({this.id, this.title, this.tahminiButce});

  factory Proje.fromJson(Map<String, dynamic> json) {
    return Proje(
      id: int.parse(json["id"]),
      title: json["title"],
      tahminiButce: int.parse(json["tahminiButce"]),
    );
  }
//

}

这是运行以保存列表的代码：

void saveOrUpdate() {
      var pb = int.tryParse(tec2.text);
      var _id = new DateTime.now().millisecondsSinceEpoch;
      if (index == null) {
        curP.title = tec.text;
        curP.tahminiButce = pb == null ? 0 : pb;
        curP.id = _id;
        pc.projeList.add(curP);
      } else {
        curP = pc.projeList[index];
        curP.title = tec.text;
        curP.tahminiButce = pb == null ? 0 : int.parse(tec2.text);
        pc.projeList[index] = curP;
      }
      Get.back();
    }

提前致谢。

将对象转换为可编码对象在第一次运行时失败

0 个答案: