javascript - 尝试在 firebase 中链接多个身份验证提供程序时，从 error.email 获取 "undefined"

Question

我正在尝试使用 firebase 将多个身份验证提供程序链接到一个帐户。用户正在尝试创建一个与 firebase 上已存在的 Google OAuth 帐户地址相同的帐户。

firebase
.auth()
.createUserWithEmailAndPassword(email, password)
.then(async result => {
    if (result.additionalUserInfo.isNewUser) {
        firebase
            .database()
            .ref('/users/' + result.user.uid)
            .set({
                email: email,
                profile_picture: image,
                first_name: firstName,
                last_name: lastName,
                created_at: Date.now()
            })
            .then(snapshot => console.log("do something"))
    } else {
        firebase
            .database()
            .ref('/users/' + result.user.uid)
            .update({
                last_logged_in: Date.now()
            })
            .then(snapshot => console.log("do something"))
    }
})
.catch(error => {
    if (error.code === 'auth/email-already-in-use' || error.code === 'auth/credential-already-in-use' || error.code === 'auth/account-exists-with-different-credential') {
        const pendingCred = error.credential
        const email = error.email
        firebase
            .auth()
            .fetchSignInMethodsForEmail(email)
            .then(methods => {
                switch (methods[0]) {
                    case 'password':
                        // email and password logic
                        break;
                    case 'facebook.com':
                        // facebook logic
                        break;
                    default:
                        break;
                }
            })
        return;
    }
})

问题是我收到了正确的错误消息:

[Error: The email address is already in use by another account.]

和正确的error.code:

auth/email-already-in-use

但是，pendingCred 或 error.email 返回未定义。

更新
我接受了建议并尝试了以下方法:

firebase.auth()
    .EmailAuthProvider
    .credential(email, password)
    .then(result => console.log("result", result))
    .catch(error => console.log(error))

我收到错误:

[TypeError: undefined is not an object (evaluating '_firebase.default.auth().EmailAuthProvider.credential')]

Answer 1

您使用的 createuserwithEmailAndPassword 不包含 error.email 或 error.credential。根据文档获取错误，您可以使用 error.message 或 error.code:

firebase.auth().createUserWithEmailAndPassword(email, password)
    .catch(function(error) {
  // Handle Errors here.
  var errorCode = error.code;
  var errorMessage = error.message;
  if (errorCode == 'auth/weak-password') {
    alert('The password is too weak.');
  } else {
    alert(errorMessage);
  }
  console.log(error);
});

根据文档，如果收到以下错误代码，则使用 error.email 和 error.credential:

auth/credential-already-in-use
auth/account-exists-with-different-credential

https://firebase.google.com/docs/reference/js/firebase.auth.Auth#error-codes_5

https://firebase.google.com/docs/reference/js/firebase.auth.Auth.html#sign-inwith-credential