包含使用Flutter中的Dio的POSTAPI的專案串列的引數

我是 Flutter 的新手，我需要幫助來了解如何為包含 Flutter 中專案串列的引數格式化我的請求有效負載。

范圍： "receiverListRequest"

示例請求負載：

{
    "id": "abcd12234555",
    "amount": "100",
    "receiverCount": "2",
    "receiverListRequest": [
        {
          
            "phone": "9123456",
            "id": "abcd12234555",
            "name": "Mark",
            "amount": "100"
        },
         {
           
            "phone": "9123456",
            "id": "abcd12234555",
            "name": "Robert",
            "amount": "520"
        }
                
    ]
}

我可以到達這一步，現在卡住了，因為不知道如何格式化我的資料：

  Future<SubmitDataModel> submitData(
        {id,
        amount,
        receiverCount,
        required Map<String, dynamic> receiverReqList}) async {
    response = await dio.post(
        'my_submit_URL',
        data: {
          'id': '$id',
          'amount': '$amount',
          'receiverCount': '$receiverCount',
          'receiverListRequest': receiverReqList
        }).then((value) {
      if (value.statusCode == 200) {
        response = value;
        return SubmitDataModel.fromJson(response.data);
      } 
    });
    log('$response');
    return SubmitDataModel.fromJson(response.data);
}

我被困在這里。

APIFunctions _apiCaller = APIFunctions();

    _apiCaller
              .submitRequest(
                "id": "abcd12234555",
                "amount": "100",
                "receiverCount": "2",
                "receiverListRequest": (// ***How to Add my list of data here??***))
                    .then((value) {
            if (value.status == 200) {
             // to do something here
            }
          });

uj5u.com熱心網友回復：

您可以在模型類中創建一個串列

說，你的回應也在 json 中給出一個串列，在模型類中創建一個串列變數。在你的情況下：-

String id;
String amount;
String receiverCount;
List<ReceiverListRequest> receiverListRequest;

在工廠方法內部，每當您參考新方法（或類）的串列變數呼叫時，您將在其中將這些串列值轉換為新類。

在你的情況下： - receiverListRequest: List<ReceiverListRequest>.from(json["receiverListRequest"].map((x) => ReceiverListRequest.fromJson(x))),

您的 ReceiverListRequest 模型類將如下所示：-

class ReceiverListRequest {
    ReceiverListRequest({
        this.phone,
        this.id,
        this.name,
        this.amount,
    });

    String phone;
    String id;
    String name;
    String amount;
}

在該類中，您還有一個其他因子方法可以將動態字串回應轉換為 Map，就像您之前所做的那樣。

像這樣的東西：-

  factory ReceiverListRequest.fromJson(Map<String, dynamic> json) => ReceiverListRequest(
        phone: json["phone"],
        id: json["id"],
        name: json["name"],
        amount: json["amount"],
    );

    Map<String, dynamic> toJson() => {
        "phone": phone,
        "id": id,
        "name": name,
        "amount": amount,
    };
}

JSON 回應的完整 dart 類將如下所示

// To parse this JSON data, do
//
//     final listRequest = listRequestFromJson(jsonString);

import 'dart:convert';

ListRequest listRequestFromJson(String str) => ListRequest.fromJson(json.decode(str));

String listRequestToJson(ListRequest data) => json.encode(data.toJson());

class ListRequest {
    ListRequest({
        this.id,
        this.amount,
        this.receiverCount,
        this.receiverListRequest,
    });

    String id;
    String amount;
    String receiverCount;
    List<ReceiverListRequest> receiverListRequest;

    factory ListRequest.fromJson(Map<String, dynamic> json) => ListRequest(
        id: json["id"],
        amount: json["amount"],
        receiverCount: json["receiverCount"],
        receiverListRequest: List<ReceiverListRequest>.from(json["receiverListRequest"].map((x) => ReceiverListRequest.fromJson(x))),
    );

    Map<String, dynamic> toJson() => {
        "id": id,
        "amount": amount,
        "receiverCount": receiverCount,
        "receiverListRequest": List<dynamic>.from(receiverListRequest.map((x) => x.toJson())),
    };
}

class ReceiverListRequest {
    ReceiverListRequest({
        this.phone,
        this.id,
        this.name,
        this.amount,
    });

    String phone;
    String id;
    String name;
    String amount;

    factory ReceiverListRequest.fromJson(Map<String, dynamic> json) => ReceiverListRequest(
        phone: json["phone"],
        id: json["id"],
        name: json["name"],
        amount: json["amount"],
    );

    Map<String, dynamic> toJson() => {
        "phone": phone,
        "id": id,
        "name": name,
        "amount": amount,
    };
}

標籤：json 扑 镖

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