android - 函数 'Stream<User?>' 无法返回类型为 'user' 的值，因为它在 flutter 中的返回类型为 'Stream<User>'

Question

我正在尝试实现一个 getter，但它在下面代码 fragment 的最后一行向我显示了这个错误。

代码是——

class AuthRepository extends BaseAuthRepository {

  final FirebaseFirestore _firebaseFirestore;
  final auth.FirebaseAuth _firebaseAuth;

  AuthRepository({
    FirebaseFirestore? firebaseFirestore,
    auth.FirebaseAuth? firebaseAuth,
  })  : _firebaseFirestore = firebaseFirestore ?? FirebaseFirestore.instance,
        _firebaseAuth = firebaseAuth ?? auth.FirebaseAuth.instance;

  @override
  // TODO: implement user
  Stream<auth.User> get user => _firebaseAuth.userChanges();

Answer 1

试试这个

Stream<auth.User?> get user => auth.userChanges();