Firebase Auth (javascript)：链接帐户时'TypeError: user.delete不是函数‘

Question

我正在尝试将一个匿名firebase帐户与一个提供商帐户相链接，并且我正在使用下面的javascript代码，它是我从这里的文档中复制的：https://firebase.google.com/docs/auth/web/account-linking

这就是我正在使用的代码：

function mergeAccounts(credential){

    console.log("merging guest account with provider account");

    var auth = firebase.auth();

    // Get reference to the currently signed-in user
    var prevUser = auth.currentUser;
    // Sign in user with another account
    auth.signInAndRetrieveDataWithCredential(credential).then(function(user) {
      console.log("Sign In Success", user);
      var currentUser = user;
      // Merge prevUser and currentUser data stored in Firebase.
      // Note: How you handle this is specific to your application

      // After data is migrated delete the duplicate user
      return user.delete().then(function() {
        // Link the OAuth Credential to original account
        return prevUser.linkAndRetrieveDataWithCredential(credential);
      }).then(function() {
        // Sign in with the newly linked credential
        return auth.signInAndRetrieveDataWithCredential(credential);
      });
    }).catch(function(error) {
      console.log("Sign In Error", error);
    });
}

当我以匿名用户身份登录到firebase，然后尝试使用我的google帐户登录时，上面的代码成功地将我登录到google ( console.log("Sign In Success", user);行按预期工作，并在控制台中显示用户详细信息。但随后我得到了一个错误，指出Sign In Error TypeError: user.delete is not a function at 16login.js:212引用了包含return user.delete().then(function() {的行

我使用的文档和代码片段似乎表明delete()是user的一个函数，所以我对它抛出这个错误的原因感到有点困惑。

任何帮助都非常感谢-谢谢。

Answer 1

您使用的是signInAndRetrieveDataWithCredential方法，而不是signInWithCredential，因此返回值是一个UserCredential对象。您需要通过回调函数的返回属性的user属性访问user：

    auth.signInAndRetrieveDataWithCredential(credential).then(function(userCredential) {
          const user = userCredential.user; // HERE
          console.log("Sign In Success", user);
          var currentUser = user;
          // Merge prevUser and currentUser data stored in Firebase.
          // Note: How you handle this is specific to your application

          // After data is migrated delete the duplicate user
          return user.delete().then(function() {
            // Link the OAuth Credential to original account
            return prevUser.linkAndRetrieveDataWithCredential(credential);
          }).then(function() {
            // Sign in with the newly linked credential
            return auth.signInAndRetrieveDataWithCredential(credential);
          });
        }).catch(function(error) {
          console.log("Sign In Error", error);
        });