我试图在Dart中反序列化一个非常复杂的JSON,但是我不知道出了什么问题。
当它尝试反序列化时,它向我显示了以下错误:“type'\u InternalLinkedHashMap”
有人知道发生了什么事吗?
这是我的密码:
{
"Instytucja": [
"TypInstytucji": "bank krajowy",
"PodtypInstytucji": "bank centralny",
"NrInstytucji": 101,
"NazwaInstytucji": "Narodowy Bank Polski",
"SymbolLiterowy": "NBP",
"DataRozpDzial": "1945-01-15",
"NIP": 5250008198,
"IdentyfikatorLEI": "549300K7Z2KT76WQJD18",
"WWW": "www.nbp.pl",
"Jendostka": [
{
"NrEwidencyjny": "A000001",
"TypJednostki": "Centrala",
"NazwaJednostki": "Centrala",
"SymbolLiterowy": "C-la",
"DaneAdresowe": {
"kraj": "POLSKA",
"wojewodztwo": "MAZOWIECKIE",
"powiat": "Warszawa",
"miejscowosc": "Warszawa",
"ulica": "ul. Świętokrzyska",
"numerBudynku": "11/21",
"kodPocztowy": "00-919",
"poczta": "Warszawa",
"nrSkrytkiPocztowej": 1011
},
"DataPodjeciaDzialalnosci": "1945-01-15",
"NumerTelefonu": "22 185 10 10",
"NumerFaksu": "22 185 23 09",
"NumerRozliczeniowy": [
{
"NrRozliczeniowy": 10100000,
"NazwaNumeru": "Centrala",
"KodyBIC": [
"BIC NBPLPLPWXXX",
"BIC SEPA NBPLPLPWXXX"
],
"DataWygenerowania": "1945-01-15"
},
{
"NrRozliczeniowy": 10100055,
"NazwaNumeru": "Centrala - B2B Collect",
"KodyBIC": [
"BIC NBPLPLPWXXX",
"BIC SEPA NBPLPLPWXXX"
],
"DataWygenerowania": "2008-04-01"
},
{
"NrRozliczeniowy": 10100068,
"NazwaNumeru": "Centrala - NBPCollect",
"KodyBIC": [
"BIC NBPLPLPWXXX",
"BIC SEPA NBPLPLPWXXX"
],
"DataWygenerowania": "2008-10-01"
},
{
"NrRozliczeniowy": 10100071,
"NazwaNumeru": "Centrala - B2B-2",
"KodyBIC": [
"BIC NBPLPLPWXXX",
"BIC SEPA NBPLPLPWXXX"
],
"DataWygenerowania": "2016-08-01"
}
]
},
]
]
}
import 'package:equatable/equatable.dart';
abstract class Bank extends Equatable {
List<Institution> get institutions;
}
abstract class Institution extends Equatable {
List<Unit> get units;
}
abstract class Unit extends Equatable {
List<SortNumber> get sortNumbers;
}
abstract class SortNumber extends Equatable {
int get sortNumber;
}
import 'package:jaki_to_bank/features/home/domain/entities/bank.dart';
import 'package:json_annotation/json_annotation.dart';
part 'bank_model.g.dart';
@JsonSerializable()
class BankModel extends Bank {
BankModel({required this.institutions});
factory BankModel.fromJson(Map<String, dynamic> json) => _$BankModelFromJson(json);
@override
@JsonKey(name: 'Instytucja')
final List<InstitutionModel> institutions;
@override
List<Object?> get props => [institutions];
}
@JsonSerializable()
class InstitutionModel extends Institution {
InstitutionModel({required this.units});
factory InstitutionModel.fromJson(Map<String, dynamic> json) => _$InstitutionModelFromJson(json);
@override
@JsonKey(name: 'Jednostka')
final List<UnitModel> units;
@override
List<Object?> get props => [units];
}
@JsonSerializable()
class UnitModel extends Unit {
UnitModel({required this.sortNumbers});
factory UnitModel.fromJson(Map<String, dynamic> json) => _$UnitModelFromJson(json);
@override
@JsonKey(name: 'NumerRozliczeniowy')
final List<SortNumberModel> sortNumbers;
@override
List<Object?> get props => [sortNumbers];
}
@JsonSerializable()
class SortNumberModel extends SortNumber {
SortNumberModel({required this.sortNumber});
factory SortNumberModel.fromJson(Map<String, dynamic> json) => _$SortNumberModelFromJson(json);
@override
@JsonKey(name: 'NrRozliczeniowy')
final int sortNumber;
@override
List<Object?> get props => [sortNumber];
}
import 'dart:convert';
import 'package:flutter/services.dart';
import 'package:jaki_to_bank/core/app/files.dart';
import 'package:jaki_to_bank/features/home/data/models/bank_model.dart';
import 'package:jaki_to_bank/features/home/domain/entities/bank.dart';
abstract class BanksDataSource {
Future<Bank> getBanksList();
}
class BanksDataSourceImpl extends BanksDataSource {
@override
Future<Bank> getBanksList() async {
final String source = Files.banks;
final String banks = await rootBundle.loadString(source);
final Map<String, dynamic> banksMap = jsonDecode(banks);
return BankModel.fromJson(banksMap);
}
}
尝试在您的机构模型(以及您曾经有嵌套类的地方)上添加@JsonSerializable(明确ToJson: true),然后运行:
flutter pub run build_runner build --delete-conflicting-outputs
有关更多信息,请查看颤振。开发人员:https://flutter.dev/docs/development/data-and-backend/json?fbclid=IwAR2sA4lF5zRGneFH4KAqtYLLQXKF6dJqJ8QzmuY-NuEe-hiRPDUx5eNfRa8#为嵌套类生成代码
您的JSON格式不正确。
{
"Instytucja": [
{ <-- missing this
"TypInstytucji": "bank krajowy",
"PodtypInstytucji": "bank centralny",
...
}
]
}
当我运行我的代码时,它返回了错误:类型“Future”不是类型转换中“List”类型的子类型。我该如何修复它?它是在我从Firebase获取数据之前匹配引擎运行的?我试图将wait添加到List demoProfiles=getdata()作为wait List;但它返回错误。我真的是新手,这个问题已经困扰了我一整天。请帮帮我
我有错误从标题时试图这样做 > 我创建了@JsonSerialiazable()类来处理json 然后,在调用http时。get(),我执行以下操作: map变量如下所示: 当调用$MyResponseFromJson(json)时,当它试图从我的响应中执行(json['a']as List)时,它会给出一个错误。g、 构建运行程序生成的dart文件。 我如何修复错误? 谢啦
我从Firestore示例中复制了一段代码: 但是我得到了这个错误 这里出了什么问题?
我是一个新手,我尝试运行一个GitHub项目,但遇到了一个错误,比如类型ListDynamic不是类型ListInt的子类型。Github链接 误差线 以上代码文件 如有任何帮助,我们将不胜感激,并提前向您表示感谢。
我正在开发一个依靠API REST调用的flutter应用程序。来自API的响应有点复杂。当调用我的API(例如:api/产品)时,我可以从日志中看到响应:但是我有这个错误: 类型列表 StackTrace: [更新]:退货产品响应。fromJson(response)而不是response ProductsRespository: ProductsBloc: 回应: ApiProvider: 模
我是个新手。当我运行代码时,我得到一个错误:“Future”类型不是“List”类型的子类型。如果我改变屏幕,我将得到错误:NoSuchMethodError:方法“map”被调用为null。我怎样才能解决它?谢谢你帮助我。