重置密码 Rest Api 在 Flutter

Question

 import 'dart:convert'; ResetPass resetPassFromJson(String str) => ResetPass.fromJson(json.decode(str)); String resetPassToJson(ResetPass data) => json.encode(data.toJson()); class ResetPass { ResetPass({ this.status, this.msg, }); String status; String msg; factory ResetPass.fromJson(Map<String, dynamic> json) => ResetPass( status: json["status"], msg: json["msg"], ); Map<String, dynamic> toJson() => { "status": status, "msg": msg, }; }

I am using reset password API from WordPress on the successful reset action it shows the SuccessFull Result different JSON and on the error response it shows the different JSON Error Result please if someone let me know how to handle it inside Flutter model class. I am doing目前喜欢这个

Model Class

Answer 1

您可以在下面复制粘贴运行完整代码
您可以将null分配给property ，如果它是null
例如error: json["error"] == null? null: json["error"], error: json["error"] == null? null: json["error"],

代码片段

ResetPass resetPassFromJson(String str) => ResetPass.fromJson(json.decode(str));

String resetPassToJson(ResetPass data) => json.encode(data.toJson());

class ResetPass {
  ResetPass({
    this.status,
    this.msg,
    this.error,
  });

  String status;
  String msg;
  String error;

  factory ResetPass.fromJson(Map<String, dynamic> json) => ResetPass(
        status: json["status"],
        msg: json["msg"] == null ? null : json["msg"],
        error: json["error"] == null ? null : json["error"],
      );

  Map<String, dynamic> toJson() => {
        "status": status,
        "msg": msg == null ? null : msg,
        "error": error == null ? null : error,
      };
}

output

I/flutter (13259): msg: ok message error: null
I/flutter (13259): msg: null error: error message

完整代码

import 'package:flutter/material.dart';
import 'dart:convert';
import 'package:http/http.dart' as http;

ResetPass resetPassFromJson(String str) => ResetPass.fromJson(json.decode(str));

String resetPassToJson(ResetPass data) => json.encode(data.toJson());

class ResetPass {
  ResetPass({
    this.status,
    this.msg,
    this.error,
  });

  String status;
  String msg;
  String error;

  factory ResetPass.fromJson(Map<String, dynamic> json) => ResetPass(
        status: json["status"],
        msg: json["msg"] == null ? null : json["msg"],
        error: json["error"] == null ? null : json["error"],
      );

  Map<String, dynamic> toJson() => {
        "status": status,
        "msg": msg == null ? null : msg,
        "error": error == null ? null : error,
      };
}

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    String jsonStringSuccess = '''
    {
 "status":"ok",
  "msg":"ok message"  
}
    ''';

    String jsonStringError = '''
    {
 "status":"error",  
  "error":"error message"
}
    ''';

    http.Response response = http.Response(jsonStringSuccess, 200);
    if (response.statusCode == 200) {
      ResetPass resetPassSuccess = resetPassFromJson(response.body);
      print("msg: ${resetPassSuccess.msg} error: ${resetPassSuccess.error}");
    }

    http.Response responseError = http.Response(jsonStringError, 200);
    if (responseError.statusCode == 200) {
      ResetPass resetPassError = resetPassFromJson(responseError.body);
      print("msg: ${resetPassError.msg} error: ${resetPassError.error}");
    }

    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}