Fix Dartz package with non nullable

Question

I moved my project to the sdk 2.12 and trying to update my code with the non-nullable crap.

Now I don't understand how to fix things in Dartz package...

Example:

import 'package:dartz/dartz.dart';
import 'package:mobile_100asa/http.dart';

class StatusApi {
  String endpoint = 'https://myApi.net';

  Future<Either<Exception, String>?> getStatus() async { // Forced to make nullable response here
    try {
      var response = await dio.get('$endpoint/test');
      return Right(response);
    } catch (error) {
      print(error);
      return (Left(error)); // Error Here
    }
  }
}

I'm forced to make a nullable response and then I don't know what is wrong with the catch(error).

It says: The argument type 'Object' can't be assigned to the parameter type 'Exception*'.

How this should be fixed?

I strongly suggest the fpdart package instead of dartz. fpdart has active development, and is far better documented. — Randal Schwartz, Feb 03 '23 at 20:04

Ben Butterworth · Accepted Answer · 2021-07-16T07:29:56.093

3

Have you tried using dartz: ^0.10.0-nullsafety.2, which is the pre-release version for null safety. Please check for the latest version on pub.dev.

edited Jul 16 '21 at 07:29

answered Mar 16 '21 at 16:22

Ben Butterworth

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not aware about that... I will it a try! Thanks! – Ayeye Brazo Mar 16 '21 at 16:23

Fix Dartz package with non nullable

1 Answers1