CODEWITHSUNDEEP
flutterdartretrofitpojo
Anas Yousuf
Anas Yousuf

Reputation: 523

the method 'fromjson' isn't defined for the type 'type'

The method 'fromJson' isn't defined for the type 'Type'.
Try correcting the name to the name of an existing method, or defining a method named 'fromJson'

this below code is in Retrofit.g.dart file

@override
  Future<Map<String, dynamic>> signupCustomerRegistration(customerReg) async {
    ArgumentError.checkNotNull(customerReg, 'customerReg');
    const _extra = <String, dynamic>{};
    final queryParameters = <String, dynamic>{};
    final _data = <String, dynamic>{};
    _data.addAll(customerReg?.toJson() ?? <String, dynamic>{});
    final _result = await _dio.request<Map<String, dynamic>>(
        '/api/API/CustomerSignUp',
        queryParameters: queryParameters,
        options: RequestOptions(
            method: 'POST',
            headers: <String, dynamic>{},
            extra: _extra,
            baseUrl: baseUrl),
        data: _data);
    var value = _result.data.map((k, dynamic v) =>
        MapEntry(k, dynamic.fromJson(v as Map<String, dynamic>)));

    return value;
  }

My Model File code is below:

// To parse this JSON data, do
//
//     final customerReg = customerRegFromJson(jsonString);

import 'dart:convert';

import 'package:json_annotation/json_annotation.dart';

part 'CustomerRegModel.g.dart';


@JsonSerializable()
class CustomerRegModel {
  CustomerRegModel({
    this.custUid,
    this.appname,
    this.blacklist,
    this.custEmail,
    this.custName,
    this.custPhone,
    this.fcmToken,
    this.password,
    this.agentnin,
    this.source,
    this.signupDate,
    this.commStartTime,
    this.commEndTime,
    this.commMaxValue,
    this.commMinValue,
    this.commDownValue,
    this.walletamount,
  });

  String custUid;
  String appname;
  bool blacklist;
  String custEmail;
  String custName;
  String custPhone;
  String fcmToken;
  String password;
  String agentnin;
  String source;
  int signupDate;
  int commStartTime;
  int commEndTime;
  int commMaxValue;
  int commMinValue;
  int commDownValue;
  int walletamount;

  factory CustomerRegModel.fromJson(Map<String, dynamic> json) => _$CustomerRegModelFromJson(json);
  Map<String, dynamic> toJson() => _$CustomerRegModelToJson(this);
  
  CustomerRegModel customerRegModelFromJson(String str) => CustomerRegModel.fromJson(json.decode(str));
  String customerRegModelToJson(CustomerRegModel data) => json.encode(data.toJson());
}

Tried:

Upvotes: 4

Views: 15331

Answers (2)

Pablo Marquez
Pablo Marquez

Reputation: 1

I got the solution by using a dependency override for code_builder. You don't need to replace HttpResonse for String with this solution.

dependency_overrides: code_builder: ^4.3.0

https://github.com/trevorwang/retrofit.dart/issues/505

Upvotes: 0

Anas Yousuf
Anas Yousuf

Reputation: 523

Ok so after doing research and creating an issue in Github Retrofit (https://github.com/trevorwang/retrofit.dart/issues/327) which they didn't respond, i went for searching parsing Json to Map and i found solution to my problem.

i.e:

For Retrofit Configuration:-

  @GET("/api/API/CustomerLogin")
  Future<String> loginCustomer(@Query('id') String email_or_number,
  @Query('pass') String pass, @Query('check') String check);

Notice above that i used String as response. Now i will convert String into Map using json.decode method.

final response = await client.loginCustomer(email_or_number,pass,check);
final Map<String,dynamic> map = json.decode(response);

Upvotes: 3

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