主页 / 问题 / 1142227
Accepted
Andrey Khan
Asked:2020-06-17 20:55:49 +0000 UTC2020-06-17 20:55:49 +0000 UTC

Flutter API 帖子

  • 772

有一个发布请求示例：

POST /api HTTP/1.1
Host: checkout.test.paycom.com
X-Auth: 100fe486b33784292111b7dc
Cache-Control: no-cache

{
    "id": 123,
    "method": "cards.create",
    "params": {
        "card": { "number": "4444444444444444", "expire": "0420"},
        "amount": 350000,
        "save": true
    }
}

功能：

class Service {

 static String url = 'checkout.test.paycom.com';
  static Map<String, dynamic> headers = {
    'Host': 'checkout.test.paycom.com',
    'X-Auth': '3423343243434',
    'Cache-Control': 'no-cache'
  };

  Future createCard(
      String id, String cardNumber, String expire, int amount) async {
    try {
      Map<String, dynamic> body = {
        'id': id,
        'method': 'cards.create',
        'params': {
          'card': {
            'number': cardNumber,
            'expire': expire,
          },
          'amount': amount,
        },
      };
      final response = await http.post(url, body: body, headers: headers);
      if (response.statusCode == 200) {
        final result = jsonDecode(response.body);
        List<CardModel> data = result['params']['card'];

        print(data);
      }
    } catch (e) {
      print(e.toString());
    }
    return null;
  }
}


 factory CardModel.fromJson(Map<String, dynamic> json) {
return CardModel(
  id: json['id'],
  cardNumber: json['number'],
  expire: json['expire'],
  amount: int.parse(json['amount']),
);

}

给出错误类型“_InternalLinkedHashMap<String, Object>”不是类型转换中“String”类型的子类型。我究竟做错了什么？

flutter

1 个回答

  1. Best Answer

    方服务器的回答不正确（为了不手写，有：网站，VSCode插件，AS插件，cogen）：

    import 'dart:convert';
import 'package:http/http.dart';

void main() {
  Service s = Service();
  s.createCard("123", "4444444444444444" , "0420", 350000);
}

class Service {
  static String url = 'checkout.test.paycom.com';
  static Map<String, dynamic> headers = {
    'Host': 'checkout.test.paycom.com',
    'X-Auth': '3423343243434',
    'Cache-Control': 'no-cache'
  };

  Future createCard(String id, String cardNumber, String expire, int amount) async {
    try {
      Map<String, dynamic> body = {
        'id': id,
        'method': 'cards.create',
        'params': {
          'card': {
            'number': cardNumber,
            'expire': expire,
          },
          'amount': amount,
          'save': true
        },
      };
      final response = await http.post(url, body: body, headers: headers);
      if (response.statusCode == 200) {
        CardModel data = CardModel.fromJson(json.decode(str));

        print(data.result.card.token);
      }
    } catch (e) {
      print(e.toString());
    }
    return null;
  }
}

class CardModel {
    CardModel({
        this.jsonrpc,
        this.id,
        this.result,
    });

    final String jsonrpc;
    final int id;
    final Result result;

    factory CardModel.fromJson(Map<String, dynamic> json) => CardModel(
        jsonrpc: json["jsonrpc"] == null ? null : json["jsonrpc"],
        id: json["id"] == null ? null : json["id"],
        result: json["result"] == null ? null : Result.fromJson(json["result"]),
    );

    Map<String, dynamic> toJson() => {
        "jsonrpc": jsonrpc == null ? null : jsonrpc,
        "id": id == null ? null : id,
        "result": result == null ? null : result.toJson(),
    };
}

class Result {
    Result({
        this.card,
    });

    final Card card;

    factory Result.fromJson(Map<String, dynamic> json) => Result(
        card: json["card"] == null ? null : Card.fromJson(json["card"]),
    );

    Map<String, dynamic> toJson() => {
        "card": card == null ? null : card.toJson(),
    };
}

class Card {
    Card({
        this.number,
        this.expire,
        this.token,
        this.recurrent,
        this.verify,
    });

    final String number;
    final String expire;
    final String token;
    final bool recurrent;
    final bool verify;

    factory Card.fromJson(Map<String, dynamic> json) => Card(
        number: json["number"] == null ? null : json["number"],
        expire: json["expire"] == null ? null : json["expire"],
        token: json["token"] == null ? null : json["token"],
        recurrent: json["recurrent"] == null ? null : json["recurrent"],
        verify: json["verify"] == null ? null : json["verify"],
    );

    Map<String, dynamic> toJson() => {
        "number": number == null ? null : number,
        "expire": expire == null ? null : expire,
        "token": token == null ? null : token,
        "recurrent": recurrent == null ? null : recurrent,
        "verify": verify == null ? null : verify,
    };
}

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