虽然用户已通过身份验证,但无法从数据库中删除数据?

时间:2017-05-13 18:06:39

标签: android firebase firebase-realtime-database firebase-authentication rules

我真的遇到了这个问题。我正在尝试从realtimedatabase firebase中删除一些用户。我正在使用Firebase提供的电子邮件/密码身份验证。在我重新验证用户后,我尝试从db中删除数据。我从firebase收到权限被拒绝错误(com.google.firebase.database.DatabaseException:Firebase数据库错误:权限被拒绝)。为什么呢?

这是我的代码:

    public void reAuthenticateUser(String password) {
    final FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
    AuthCredential credential = EmailAuthProvider
            .getCredential(user.getEmail(), password);
    user.reauthenticate(credential)
            .addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    if (!task.isSuccessful()) {
                        handleExceptions(task.getException());
                    } else {
                        dialog.dismiss();

                        DBHelper.getInstance().deleteUser(user.getUid());//the problem is here

                        deleteUserAccount();
                    }
                }
            });

}

这是我的DBHelper类:

 public class DBHelper {

private static DBHelper instance = null;
private FirebaseDatabase database;
private DatabaseReference ref;

private DBHelper() {
    database = FirebaseDatabase.getInstance();
}

public static DBHelper getInstance() {
    if (instance == null)
        instance = new DBHelper();

    return instance;
}

public void saveUserOnDB(String userId, String name, String email) {
    ref = database.getReference().child("users");
    ref.child(userId).setValue(new User(name, email));
}

public void deleteUser(String userId) {
    ref = database.getReference().child("users");
    ref.child(userId).removeValue().addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {
            if(!task.isSuccessful()){
                Log.e("TAG","onComplete",task.getException());
            }
        }
    });
}}

Firebase规则:

    {
  "rules": {
    ".read": "auth != null",
    ".write": "auth != null"
  }
}

在调试模式下,一切正常,而且,当我将数据库规则切换为public时,数据将从db中删除。

1 个答案:

答案 0 :(得分:0)

在请求删除用户数据后,您似乎正在删除用户的帐户:

DBHelper.getInstance().deleteUser(user.getUid());

deleteUserAccount(); // <== does this call FirebaseUser.delete()?

如果是这样,您可能正在创建一个竞争条件,其中删除帐户在异步数据删除完成之前生效。将调用移至deleteUserAccount()进入完成侦听器以删除数据:

public void deleteUser(String userId) {
    ref = database.getReference().child("users");
    ref.child(userId).removeValue().addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {
            if(task.isSuccessful()){
                deleteUserAccount();  // <== MOVE HERE
            } else {
                Log.e("TAG","onComplete",task.getException());
            }
        }
    });
}