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Flutter 将地图列表转换为dart中的对象列表

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Flutter 将地图列表转换为dart中的对象列表,flutter,dart,Flutter,Dart,我正在向API发出请求，该API将返回一个响应 final response = await http.get(Uri.parse(requestUrl), headers: headers); { "meta": { "upcomingMatchCount": 5, "inProgressMatchCount": 10, "completedMatchCount": 5 }, &qu

我正在向API发出请求，该API将返回一个响应

 final response = await http.get(Uri.parse(requestUrl), headers: headers);
 

{
"meta": {
    "upcomingMatchCount": 5,
    "inProgressMatchCount": 10,
    "completedMatchCount": 5
},
"matchList": {
    "matches": [
        {
            "id": 49944,
            "matchTypeId": 15,
            "series": {
                "id": 2739,
                "name": "LV= Insurance County Championship 2021",
                "shortName": "LV= Insurance County Championship 2021"
            },
            "name": "",
            "status": "LIVE",
            "venue": {
                "name": "The Cooper Associates County Ground",
                "shortName": "The Cooper Associates County Ground"
            },
            "homeTeam": {
                "isBatting": true,
                "id": 55,
                "name": "Somerset",
                "shortName": "SOM"
            },
            "awayTeam": {
                "isBatting": false,
                "id": 46,
                "name": "Gloucestershire",
                "shortName": "GLO"
            },
            "currentMatchState": "Live",
            "isMultiDay": true,
            "matchSummaryText": "Live: Gloucestershire won the toss and elected to bowl.",
            "scores": {
                "homeScore": "8-293",
                "homeOvers": "88.0",
                "awayScore": "0-0",
                "awayOvers": "0"
            },
            "liveStreams": [],
            "isLive": false,
            "currentInningId": 1,
            "isMatchDrawn": false,
            "isMatchAbandoned": false,
            "startDateTime": "2021-04-15T10:00:00Z",
            "endDateTime": "2021-04-18T17:00:00Z",
            "isWomensMatch": false,
            "isGamedayEnabled": false,
            "removeMatch": false
        },
        {
            "id": 49942,
            "matchTypeId": 15,
            "series": {
                "id": 2739,
                "name": "LV= Insurance County Championship 2021",
                "shortName": "LV= Insurance County Championship 2021"
            },
            "name": "",
            "status": "LIVE",
            "venue": {
                "name": "The Spitfire Ground, St Lawrence",
                "shortName": "The Spitfire Ground, St Lawrence"
            },
            "homeTeam": {
                "isBatting": false,
                "id": 45,
                "name": "Kent",
                "shortName": "KEN"
            },
            "awayTeam": {
                "isBatting": true,
                "id": 40,
                "name": "Yorkshire",
                "shortName": "YRK"
            },
            "currentMatchState": "Live",
            "isMultiDay": true,
            "matchSummaryText": "Live: Yorkshire won the toss and elected to bat.",
            "scores": {
                "homeScore": "0-0",
                "homeOvers": "0",
                "awayScore": "8-358",
                "awayOvers": "100.0"
            },
            "liveStreams": [],
            "isLive": false,
            "currentInningId": 1,
            "isMatchDrawn": false,
            "isMatchAbandoned": false,
            "startDateTime": "2021-04-15T10:00:00Z",
            "endDateTime": "2021-04-18T17:00:00Z",
            "isWomensMatch": false,
            "isGamedayEnabled": false,
            "removeMatch": false
        },
      ]
它返回以下响应

 final response = await http.get(Uri.parse(requestUrl), headers: headers);
 

{
"meta": {
    "upcomingMatchCount": 5,
    "inProgressMatchCount": 10,
    "completedMatchCount": 5
},
"matchList": {
    "matches": [
        {
            "id": 49944,
            "matchTypeId": 15,
            "series": {
                "id": 2739,
                "name": "LV= Insurance County Championship 2021",
                "shortName": "LV= Insurance County Championship 2021"
            },
            "name": "",
            "status": "LIVE",
            "venue": {
                "name": "The Cooper Associates County Ground",
                "shortName": "The Cooper Associates County Ground"
            },
            "homeTeam": {
                "isBatting": true,
                "id": 55,
                "name": "Somerset",
                "shortName": "SOM"
            },
            "awayTeam": {
                "isBatting": false,
                "id": 46,
                "name": "Gloucestershire",
                "shortName": "GLO"
            },
            "currentMatchState": "Live",
            "isMultiDay": true,
            "matchSummaryText": "Live: Gloucestershire won the toss and elected to bowl.",
            "scores": {
                "homeScore": "8-293",
                "homeOvers": "88.0",
                "awayScore": "0-0",
                "awayOvers": "0"
            },
            "liveStreams": [],
            "isLive": false,
            "currentInningId": 1,
            "isMatchDrawn": false,
            "isMatchAbandoned": false,
            "startDateTime": "2021-04-15T10:00:00Z",
            "endDateTime": "2021-04-18T17:00:00Z",
            "isWomensMatch": false,
            "isGamedayEnabled": false,
            "removeMatch": false
        },
        {
            "id": 49942,
            "matchTypeId": 15,
            "series": {
                "id": 2739,
                "name": "LV= Insurance County Championship 2021",
                "shortName": "LV= Insurance County Championship 2021"
            },
            "name": "",
            "status": "LIVE",
            "venue": {
                "name": "The Spitfire Ground, St Lawrence",
                "shortName": "The Spitfire Ground, St Lawrence"
            },
            "homeTeam": {
                "isBatting": false,
                "id": 45,
                "name": "Kent",
                "shortName": "KEN"
            },
            "awayTeam": {
                "isBatting": true,
                "id": 40,
                "name": "Yorkshire",
                "shortName": "YRK"
            },
            "currentMatchState": "Live",
            "isMultiDay": true,
            "matchSummaryText": "Live: Yorkshire won the toss and elected to bat.",
            "scores": {
                "homeScore": "0-0",
                "homeOvers": "0",
                "awayScore": "8-358",
                "awayOvers": "100.0"
            },
            "liveStreams": [],
            "isLive": false,
            "currentInningId": 1,
            "isMatchDrawn": false,
            "isMatchAbandoned": false,
            "startDateTime": "2021-04-15T10:00:00Z",
            "endDateTime": "2021-04-18T17:00:00Z",
            "isWomensMatch": false,
            "isGamedayEnabled": false,
            "removeMatch": false
        },
      ]
我正在从该响应中检索匹配列表，如下所示：

final list = map['matchList']['matches'] as List;
我有一个模型类，它表示matches键中的每个匹配项：

class MatchModel {
int id;
int matchTypeId;
Series series;
String name;
String status;
Venue venue;
HomeTeam homeTeam;
HomeTeam awayTeam;
String currentMatchState;
bool isMultiDay;
String matchSummaryText;
Scores scores;
List<Null> liveStreams;
bool isLive;
int currentInningId;
bool isMatchDrawn;
bool isMatchAbandoned;
String startDateTime;
String endDateTime;
bool isWomensMatch;
bool isGamedayEnabled;
bool removeMatch;

MatchModel(
  {this.id,
  this.matchTypeId,
  this.series,
  this.name,
  this.status,
  this.venue,
  this.homeTeam,
  this.awayTeam,
  this.currentMatchState,
  this.isMultiDay,
  this.matchSummaryText,
  this.scores,
  this.liveStreams,
  this.isLive,
  this.currentInningId,
  this.isMatchDrawn,
  this.isMatchAbandoned,
  this.startDateTime,
  this.endDateTime,
  this.isWomensMatch,
  this.isGamedayEnabled,
  this.removeMatch});

MatchModel.fromJson(Map<String, dynamic> json) {
id = json['id'];
matchTypeId = json['matchTypeId'];
series =
    json['series'] != null ? new Series.fromJson(json['series']) : null;
name = json['name'];
status = json['status'];
venue = json['venue'] != null ? new Venue.fromJson(json['venue']) : null;
homeTeam = json['homeTeam'] != null
    ? new HomeTeam.fromJson(json['homeTeam'])
    : null;
awayTeam = json['awayTeam'] != null
    ? new HomeTeam.fromJson(json['awayTeam'])
    : null;
currentMatchState = json['currentMatchState'];
isMultiDay = json['isMultiDay'];
matchSummaryText = json['matchSummaryText'];
scores =
    json['scores'] != null ? new Scores.fromJson(json['scores']) : null;
if (json['liveStreams'] != null) {
  liveStreams = new List<Null>();
  json['liveStreams'].forEach((v) {
    
  });
}
isLive = json['isLive'];
currentInningId = json['currentInningId'];
isMatchDrawn = json['isMatchDrawn'];
isMatchAbandoned = json['isMatchAbandoned'];
startDateTime = json['startDateTime'];
endDateTime = json['endDateTime'];
isWomensMatch = json['isWomensMatch'];
isGamedayEnabled = json['isGamedayEnabled'];
removeMatch = json['removeMatch'];
}


             

类匹配模型{
int-id；
int matchTypeId；
系列；
字符串名；
字符串状态；
场地;；
主队主队；
主队awayTeam；
字符串当前匹配状态；
布尔是最后一天；
字符串匹配摘要文本；
得分；
列出liveStreams；
布尔伊斯利夫；
int currentiningid；
布尔·伊斯马特；
布尔·伊斯马奇；
字符串startDateTime；
字符串endDateTime；
布尔是女子比赛；
bool-isgamedaydenabled；
布尔删除匹配；
匹配模型(
{this.id，
这个.matchTypeId，
这个系列,，
这个名字，
这个,身份,，
这个场地，
这个，主队，
这是阿瓦泰姆，
这个州，
今天是最后一天，
此.matchSummaryText，
这是我的分数，
这是liveStreams，
这是我的生活，
这是我的名字，
这是我画的，
这是我放弃的，
这是开始时间，
这个.endDateTime，
这是一场女子比赛，
此.isgameday已启用，
此参数为.removeMatch}）；
MatchModel.fromJson（映射json）{
id=json['id']；
matchTypeId=json['matchTypeId']；
系列=
json['series']！=null？新系列。fromJson（json['series']）：null；
name=json['name']；
status=json['status']；
地点=json['venture']！=null？新地点。fromJson（json['venture']）：null；
homeTeam=json['homeTeam']！=null
？新的HomeTeam.fromJson（json['HomeTeam']）
：null；
awayTeam=json['awayTeam']！=null
？新的HomeTeam.fromJson（json['awayTeam']）
：null；
currentMatchState=json['currentMatchState']；
isMultiDay=json['isMultiDay']；
matchSummaryText=json['matchSummaryText']；
得分=
json['scores']！=null？新分数。fromJson（json['scores']）：null；
if（json['liveStreams']！=null）{
liveStreams=新列表（）；
json['liveStreams'].forEach（（v）{
});
}
isLive=json['isLive']；
currentInningId=json['currentInningId']；
IsMatchDrawed=json['IsMatchDrawed']；
IsMatch放弃=json['IsMatch放弃']；
startDateTime=json['startDateTime']；
endDateTime=json['endDateTime']；
isWomensMatch=json['isWomensMatch']；
isGamedayEnabled=json['isGamedayEnabled']；
removeMatch=json['removeMatch']；
}
如何将数据从匹配列表映射到匹配模型列表？如果您还需要其他帮助，请务必告诉我。

我建议使用JSON序列化生成代码。这样，您只需为类、构造函数和
部分“match.g.dart”；
在此之后，
json_serializable
包将为您生成json转换器方法/工厂

有关更多信息，您可以使用本文：。

问题是返回的响应对象实际上是一个字符串，因此您需要首先使用like将其转换为json

var json = jsonDecode(response). 

Once you have it in json format what you can do is access the list as json['matchList']['matches']. So now you can iterater over it like 

List<MatchModel> matches = []
for(var match in json['matchList']['matches']){
     matches.add(MatchModel.fromJson(match));
}


Hope it's useful.
var json=jsonDecode（响应）。 一旦你有了json格式，你能做的就是以json['matchList']['matches']的形式访问列表 列出匹配项=[] for（json['matchList']['matches']中的变量匹配）{ add（MatchModel.fromJson（match））； } 希望有用。 试试这个

var json = jsonDecode(response.body)['matchList']['matches'];

List<MatchModel> matches = List.from(json).map((e) => MatchModel.fromJson(Map.from(e))).toList();


var json=jsonDecode（response.body）['matchList']['matches']；
List matches=List.from（json）.map（（e）=>MatchModel.fromJson（map.from（e）））.toList（）；