Flutter:Firebase 身份验证无需登录即可创建用户 [英] Flutter: Firebase authentication create user without logging In

问题描述

我的 Flutter 应用程序中有一个使用 Firebase 身份验证的用户管理功能.我可以使用 firebase_auth 的 createUserWithEmailAndPassword() 函数注册新用户帐户.

I have a user management feature in my flutter app that uses firebase authentication. I can register new user accounts using firebase_auth's createUserWithEmailAndPassword() function.

return await FirebaseAuth.instance.
    createUserWithEmailAndPassword(email: email, password: password);

问题是注册成功后，即使我已经登录，它也会自动将我的 FirebaseAuth 实例验证为新用户.

The problem is when the registration is successful it automatically authenticates my FirebaseAuth instance as the new user even though I am already logged in.

我遇到了这个答案:Firebase 踢出当前用户，但它是在 javascript 和有一个稍微不同的 api.

I came across this answer: Firebase kicks out current user but it's in javascript and has a slightly different api.

我怎样才能在 dart 中做同样的事情?

How can I do the equivalent in dart?

推荐答案

更新:firebase_core ^0.5.0 和 firebase_auth ^0.18.0+1 已弃用一些旧类.

Updated: firebase_core ^0.5.0 and firebase_auth ^0.18.0+1 has deprecated some of the old classes.

以下是为 firebase_core ^0.5.1 和 firebase_auth ^0.18.2 更新的代码.

Below is code updated for firebase_core ^0.5.1 and firebase_auth ^0.18.2.

static Future<UserCredential> register(String email, String password) async {
    FirebaseApp app = await Firebase.initializeApp(
        name: 'Secondary', options: Firebase.app().options);
    try {
        UserCredential userCredential = await FirebaseAuth.instanceFor(app: app)
        .createUserWithEmailAndPassword(email: email, password: password);
    }
    on FirebaseAuthException catch (e) {
      // Do something with exception. This try/catch is here to make sure 
      // that even if the user creation fails, app.delete() runs, if is not, 
      // next time Firebase.initializeApp() will fail as the previous one was
      // not deleted.
    }
    
    await app.delete();
    return Future.sync(() => userCredential);
}

---

原答案

我尝试了 firebase 身份验证 api，我目前的工作解决方案是:

I experimented with the firebase authentication api and my current working solution is:

// Deprecated as of `firebase_core ^0.5.0` and `firebase_auth ^0.18.0`.
// Use code above instead.

static Future<FirebaseUser> register(String email, String password) async {
    FirebaseApp app = await FirebaseApp.configure(
        name: 'Secondary', options: await FirebaseApp.instance.options);
    return FirebaseAuth.fromApp(app)
        .createUserWithEmailAndPassword(email: email, password: password);
}

基本上归结为创建一个 FirebaseAuth 的新实例，因此 createUserWithEmailAndPassword() 的自动登录不会影响默认实例.

Essentially it comes down to creating a new instance of FirebaseAuth so the automatic login from createUserWithEmailAndPassword() do not affect the default instance.

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