问题描述
我正在尝试将JSON数组解析为我的应用程序中的List，它可以与其他模型类一起使用，但是仅此特定类会出现错误。我在其他情况下也使用过类似的代码，但是在这里不起作用。如果仅使用列表而不是将类型更改为模型类并启动响应，那么它将起作用。
════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
Class 'StudyList' has no instance method '[]'.
Receiver: Instance of 'StudyList'
Tried calling: []("reportStatus")
════════════════════════════════════════════════════════════════════════════════════════════════════
这是我的模型课：
class StudyList {
String studyUID;
String patientId;
String patientName;
String studyDateTime;
String modalityName;
String study;
String studyDescription;
String refferringPhysician;
String clinicalHistory;
String siteName;
String reportPath;
String attachmentPath;
String imageReceviedTime;
var reportReceviedTime;
int noOfImages;
String reportStatus;
String radiologistName;
String gender;
String age;
int series;
int siteID;
int radiologistID;
var reportReceviedTime1;
String radiologistAssignedTime;
int radcentreId;
String examdate;
int emergencyst;
String studycode;
var repdown;
String thumbnail;
int modality;
int status;
var studyview;
var studydown;
StudyList(
{this.studyUID,this.patientId,this.patientName,this.studyDateTime,this.modalityName,this.study,this.studyDescription,this.refferringPhysician,this.clinicalHistory,this.siteName,this.reportPath,this.attachmentPath,this.imageReceviedTime,this.reportReceviedTime,this.noOfImages,this.reportStatus,this.radiologistName,this.gender,this.age,this.series,this.siteID,this.radiologistID,this.reportReceviedTime1,this.radiologistAssignedTime,this.radcentreId,this.examdate,this.emergencyst,this.studycode,this.repdown,this.thumbnail,this.modality,this.status,this.studyview,this.studydown});
StudyList.fromJson(Map<String,dynamic> json) {
studyUID = json['studyUID'];
patientId = json['patientId'];
patientName = json['patientName'];
studyDateTime = json['studyDateTime'];
modalityName = json['modalityName'];
study = json['study'];
studyDescription = json['studyDescription'];
refferringPhysician = json['refferringPhysician'];
clinicalHistory = json['clinicalHistory'];
siteName = json['siteName'];
reportPath = json['reportPath'];
attachmentPath = json['attachmentPath'];
imageReceviedTime = json['imageReceviedTime'];
reportReceviedTime = json['reportReceviedTime'];
noOfImages = json['noOfImages'];
reportStatus = json['reportStatus'];
radiologistName = json['radiologistName'];
gender = json['gender'];
age = json['age'];
series = json['series'];
siteID = json['siteID'];
radiologistID = json['radiologistID'];
reportReceviedTime1 = json['reportReceviedTime1'];
radiologistAssignedTime = json['radiologistAssignedTime'];
radcentreId = json['radcentreId'];
examdate = json['examdate'];
emergencyst = json['emergencyst'];
studycode = json['studycode'];
repdown = json['repdown'];
thumbnail = json['thumbnail'];
modality = json['modality'];
status = json['status'];
studyview = json['studyview'];
studydown = json['studydown'];
}
Map<String,dynamic> toJson() {
final Map<String,dynamic> data = new Map<String,dynamic>();
data['studyUID'] = this.studyUID;
data['patientId'] = this.patientId;
data['patientName'] = this.patientName;
data['studyDateTime'] = this.studyDateTime;
data['modalityName'] = this.modalityName;
data['study'] = this.study;
data['studyDescription'] = this.studyDescription;
data['refferringPhysician'] = this.refferringPhysician;
data['clinicalHistory'] = this.clinicalHistory;
data['siteName'] = this.siteName;
data['reportPath'] = this.reportPath;
data['attachmentPath'] = this.attachmentPath;
data['imageReceviedTime'] = this.imageReceviedTime;
data['reportReceviedTime'] = this.reportReceviedTime;
data['noOfImages'] = this.noOfImages;
data['reportStatus'] = this.reportStatus;
data['radiologistName'] = this.radiologistName;
data['gender'] = this.gender;
data['age'] = this.age;
data['series'] = this.series;
data['siteID'] = this.siteID;
data['radiologistID'] = this.radiologistID;
data['reportReceviedTime1'] = this.reportReceviedTime1;
data['radiologistAssignedTime'] = this.radiologistAssignedTime;
data['radcentreId'] = this.radcentreId;
data['examdate'] = this.examdate;
data['emergencyst'] = this.emergencyst;
data['studycode'] = this.studycode;
data['repdown'] = this.repdown;
data['thumbnail'] = this.thumbnail;
data['modality'] = this.modality;
data['status'] = this.status;
data['studyview'] = this.studyview;
data['studydown'] = this.studydown;
return data;
}
}
这是我用于解析API中数据的代码：
List<StudyList> _patientDataapi = List();
setState(() {
_shimmerLoader = true;
_patientDataapi = (json.decode(res.body))
.map<StudyList>((item) => StudyList.fromJson(item))
.toList();
});
最后，这是制作API时获取的JSON数据：
[
{
"studyUID": "1.2.840.113619.2.55.3.2831168001.314.1602949790.991","patientId": "4789","patientName": "MR.ANIKET ADKAKE","studyDateTime": "2020-10-17T22:22:04","modalityName": "CT","study": "NECK PLAIN","studyDescription": "CT-NECK","refferringPhysician": "G.H.S","clinicalHistory": "H/O- LOSS OF VOICE","siteName": "Aditya sangli","reportPath": "","attachmentPath": "","imageReceviedTime": "2020-10-17T22:24:49","reportReceviedTime": null,"noOfImages": 215,"reportStatus": "Pending","radiologistName": "Dr.Agarwal","gender": "M","age": "026Y","series": 5,"siteID": 209,"radiologistID": 518,"reportReceviedTime1": null,"radiologistAssignedTime": "2020-10-17T22:48:00","radcentreId": 6,"examdate": "2020-10-17T21:38:57","emergencyst": 0,"studycode": "CT-21","repdown": null,"thumbnail": "","modality": 1,"status": 3,"studyview": null,"studydown": null
},{
"studyUID": "1.2.840.113619.2.55.3.2831168001.314.1602949791.126","patientId": "CT-4792","patientName": "MR.ANIKET ADAKE","studyDateTime": "2020-10-17T23:49:32","studyDescription": "CT-NECK PLAIN","reportPath": "C:\\KINSOLUTIONS\\Team\\Report\\1.2.840.113619.2.55.3.2831168001.314.1602949791.126.docx","imageReceviedTime": "2020-10-17T23:50:29","noOfImages": 273,"reportStatus": "Final","age": "025Y","series": 4,"reportReceviedTime1": "2020-10-18T00:25:07","radiologistAssignedTime": "2020-10-17T23:52:08","examdate": "2020-10-17T23:46:03","repdown": true,"status": 5,"studydown": null
}
]
解决方法
这是您提供的json：
[
{
"studyUID": "1.2.840.113619.2.55.3.2831168001.314.1602949790.991","patientId": "4789","patientName": "MR.ANIKET ADKAKE","studyDateTime": "2020-10-17T22:22:04","modalityName": "CT","study": "NECK PLAIN","studyDescription": "CT-NECK","refferringPhysician": "G.H.S","clinicalHistory": "H/O- LOSS OF VOICE","siteName": "Aditya sangli","reportPath": "","attachmentPath": "","imageReceviedTime": "2020-10-17T22:24:49","reportReceviedTime": null,"noOfImages": 215,"reportStatus": "Pending","radiologistName": "Dr.Agarwal","gender": "M","age": "026Y","series": 5,"siteID": 209,"radiologistID": 518,"reportReceviedTime1": null,"radiologistAssignedTime": "2020-10-17T22:48:00","radcentreId": 6,"examdate": "2020-10-17T21:38:57","emergencyst": 0,"studycode": "CT-21","repdown": null,"thumbnail": "","modality": 1,"status": 3,"studyview": null,"studydown": null
},{
"studyUID": "1.2.840.113619.2.55.3.2831168001.314.1602949791.126","patientId": "CT-4792","patientName": "MR.ANIKET ADAKE","studyDateTime": "2020-10-17T23:49:32","studyDescription": "CT-NECK PLAIN","reportPath": "C:\\KINSOLUTIONS\\Team\\Report\\1.2.840.113619.2.55.3.2831168001.314.1602949791.126.docx","imageReceviedTime": "2020-10-17T23:50:29","noOfImages": 273,"reportStatus": "Final","age": "025Y","series": 4,"reportReceviedTime1": "2020-10-18T00:25:07","radiologistAssignedTime": "2020-10-17T23:52:08","examdate": "2020-10-17T23:46:03","repdown": true,"status": 5,"studydown": null
}
]
这是上述json的更新的模型类：
// To parse this JSON data,do
//
// final studyList = studyListFromJson(jsonString);
import 'dart:convert';
List<StudyList> studyListFromJson(String str) => List<StudyList>.from(json.decode(str).map((x) => StudyList.fromJson(x)));
String studyListToJson(List<StudyList> data) => json.encode(List<dynamic>.from(data.map((x) => x.toJson())));
class StudyList {
StudyList({
this.studyUid,this.patientId,this.patientName,this.studyDateTime,this.modalityName,this.study,this.studyDescription,this.refferringPhysician,this.clinicalHistory,this.siteName,this.reportPath,this.attachmentPath,this.imageReceviedTime,this.reportReceviedTime,this.noOfImages,this.reportStatus,this.radiologistName,this.gender,this.age,this.series,this.siteId,this.radiologistId,this.reportReceviedTime1,this.radiologistAssignedTime,this.radcentreId,this.examdate,this.emergencyst,this.studycode,this.repdown,this.thumbnail,this.modality,this.status,this.studyview,this.studydown,});
String studyUid;
String patientId;
String patientName;
DateTime studyDateTime;
String modalityName;
String study;
String studyDescription;
String refferringPhysician;
String clinicalHistory;
String siteName;
String reportPath;
String attachmentPath;
DateTime imageReceviedTime;
dynamic reportReceviedTime;
int noOfImages;
String reportStatus;
String radiologistName;
String gender;
String age;
int series;
int siteId;
int radiologistId;
DateTime reportReceviedTime1;
DateTime radiologistAssignedTime;
int radcentreId;
DateTime examdate;
int emergencyst;
String studycode;
bool repdown;
String thumbnail;
int modality;
int status;
dynamic studyview;
dynamic studydown;
factory StudyList.fromJson(Map<String,dynamic> json) => StudyList(
studyUid: json["studyUID"],patientId: json["patientId"],patientName: json["patientName"],studyDateTime: DateTime.parse(json["studyDateTime"]),modalityName: json["modalityName"],study: json["study"],studyDescription: json["studyDescription"],refferringPhysician: json["refferringPhysician"],clinicalHistory: json["clinicalHistory"],siteName: json["siteName"],reportPath: json["reportPath"],attachmentPath: json["attachmentPath"],imageReceviedTime: DateTime.parse(json["imageReceviedTime"]),reportReceviedTime: json["reportReceviedTime"],noOfImages: json["noOfImages"],reportStatus: json["reportStatus"],radiologistName: json["radiologistName"],gender: json["gender"],age: json["age"],series: json["series"],siteId: json["siteID"],radiologistId: json["radiologistID"],reportReceviedTime1: json["reportReceviedTime1"] == null ? null : DateTime.parse(json["reportReceviedTime1"]),radiologistAssignedTime: DateTime.parse(json["radiologistAssignedTime"]),radcentreId: json["radcentreId"],examdate: DateTime.parse(json["examdate"]),emergencyst: json["emergencyst"],studycode: json["studycode"],repdown: json["repdown"] == null ? null : json["repdown"],thumbnail: json["thumbnail"],modality: json["modality"],status: json["status"],studyview: json["studyview"],studydown: json["studydown"],);
Map<String,dynamic> toJson() => {
"studyUID": studyUid,"patientId": patientId,"patientName": patientName,"studyDateTime": studyDateTime.toIso8601String(),"modalityName": modalityName,"study": study,"studyDescription": studyDescription,"refferringPhysician": refferringPhysician,"clinicalHistory": clinicalHistory,"siteName": siteName,"reportPath": reportPath,"attachmentPath": attachmentPath,"imageReceviedTime": imageReceviedTime.toIso8601String(),"reportReceviedTime": reportReceviedTime,"noOfImages": noOfImages,"reportStatus": reportStatus,"radiologistName": radiologistName,"gender": gender,"age": age,"series": series,"siteID": siteId,"radiologistID": radiologistId,"reportReceviedTime1": reportReceviedTime1 == null ? null : reportReceviedTime1.toIso8601String(),"radiologistAssignedTime": radiologistAssignedTime.toIso8601String(),"radcentreId": radcentreId,"examdate": examdate.toIso8601String(),"emergencyst": emergencyst,"studycode": studycode,"repdown": repdown == null ? null : repdown,"thumbnail": thumbnail,"modality": modality,"status": status,"studyview": studyview,"studydown": studydown,};
}
这是以下实现：
import 'package:flutter/material.dart';
import 'package:json_parsing_example/model2.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: SampleApp(),debugShowCheckedModeBanner: false,);
}
}
class SampleApp extends StatefulWidget {
@override
_SampleAppState createState() => _SampleAppState();
}
class _SampleAppState extends State<SampleApp> {
bool _isLoading = false;
List<StudyList> list = List();
fetchData() async {
setState(() {
_isLoading = true;
});
String data =
await DefaultAssetBundle.of(context).loadString("json/parse.json");
// This is the above where you get the remote data
// Like var response = await http.get('your url');
// final studyList = studyListFromJson(data);
final studyList = studyListFromJson(data);
list = studyList;
setState(() {
_isLoading = false;
});
}
@override
void initState() {
super.initState();
fetchData();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Your heading'),),body: Container(
child: _isLoading
? Center(child: CircularProgressIndicator())
: Column(
children: <Widget>[
ListView.builder(
shrinkWrap: true,itemCount: list.length,itemBuilder: (context,index) {
return Card(
child: Column(
children: <Widget>[
Text('${list[index].patientId }'),Text('${list[index].patientName}')
],);
})
],)));
}
}
让我知道它是否有效。
,这是解决方案：
API调用：
filteredUsers = (resBodystudyNames)
.map<StudyList>((item) => StudyList.fromJson(item))
.toList();
_patientDataapi=filteredUsers;
列表视图：
child: ListView.builder(
itemCount: _patientDataapi.length,index) {
return Container(
padding: EdgeInsets.fromLTRB(4,5,0),height: 185,width: double.maxFinite,child: Card(
shape: RoundedRectangleBorder(
borderRadius:
BorderRadius.circular(20.0),elevation: 5,child: Container(
height: 2.0,decoration: BoxDecoration(
border: Border(
left: _cardborderColor(
_patientDataapi[index]),color: Colors.white,child: Padding(
padding: EdgeInsets.all(5),child: Stack(children: <Widget>[
Align(
alignment: Alignment.centerRight,child: Stack(
children: <Widget>[
Padding(
padding:
const EdgeInsets.only(
left: 10,top: 2),child: Column(
children: <Widget>[
Row(
children: <Widget>[
Wrap(
children: [
patient_Name(
_patientDataapi[
index]),SizedBox(
width: 20,_patientAgeSex(
_patientDataapi[
index])
],],SizedBox(
height: 5,Row(
children: [
Flexible(
flex: 0,child: patientReport(
_patientDataapi[
index]),SizedBox(
width: 40,Flexible(
flex: 2,child: patientStudyName(
_patientDataapi[
index]),child: patientSeeBar(
_patientDataapi[
index]),Row(
children: [
patientEditInfo(
_patientDataapi[
index]),Spacer(),moreInfo(
_patientDataapi[
index])
],Row(
children: [
patientStat(
_patientDataapi[
index]),SizedBox(
width: 20,_patientStat(
_patientDataapi[
index]),patientDoctor(
_patientDataapi[
index]),Row(
children: [
/*patientidData(
patientData[index])*/
],))
],)
]),);
}),小部件功能：
Widget patient_Name(var data) {
return Align(
alignment: Alignment.centerLeft,child: RichText(
text: TextSpan(
text: '${data.patientName}',//${data['patientName']}
style: TextStyle(
fontWeight: FontWeight.bold,color: Colors.black,fontSize: 14),children: <TextSpan>[],);
}
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错误1：Request method ‘DELETE‘ not supported 错误还原：...