NextAuth Firebase 后端“ReferenceError：初始化前无法访问‘应用’”

Posted 2023-03-30

【中文标题】NextAuth Firebase 后端“ReferenceError：初始化前无法访问‘应用’”

【英文标题】：NextAuth Firebase Backend "ReferenceError: Cannot access 'app' before initialization"

【发布时间】：2021-12-12 16:21:06

【问题描述】：

我试图在使用下一个身份验证时将用户存储在 firebase 后端，但无法解决此错误

使用 next-auth FIREBASE 适配器。

https://next-auth.js.org/adapters/firebase :我正在关注文档

Firebase 客户端

import firebase from "firebase/app";
import "firebase/auth";
import "firebase/firestore";

// Import the functions you need from the SDKs you need
import  initializeApp  from "firebase/app";
import  getAnalytics  from "firebase/analytics";

// Your web app's Firebase configuration
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
const firebaseConfig = 
  apiKey: process.env.NEXT_PUBLIC_FIREBASE_API_KEY,
  authDomain: process.env.NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN,
  projectId: process.env.NEXT_PUBLIC_FIREBASE_PROJECT_ID,
  storageBucket: process.env.NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET,
  messagingSenderId: process.env.NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID,
  appId: process.env.NEXT_PUBLIC_FIREBASE_APP_ID,
  measurementId: process.env.NEXT_PUBLIC_FIREBASE_MEASURMENT_ID,
;

// Initialize Firebase
const analytics = getAnalytics(app);
const app = initializeApp(firebaseConfig);

export default firebase;

[...nextauth].js

import NextAuth from "next-auth";
import  FirebaseAdapter  from "@next-auth/firebase-adapter";
import firebaseClient from "../../../firebase/FirebaseClient";
import GoogleProvider from "next-auth/providers/google";

import firebase from "firebase/app";
import "firebase/firestore";

const firestore = (firebase.apps[0] ?? firebaseClient).firestore();

export default NextAuth(
  // Configure one or more authentication providers
  providers: [
    GoogleProvider(
      clientId: process.env.GOOGLE_CLIENT_ID,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
    ),
  ],
  adapter: FirebaseAdapter(firestore),
);

错误

ReferenceError: Cannot access 'app' before initialization

【参考方案1】：

我打赌您需要如下切换行，因为您在创建分析时没有 app 变量：

const app = initializeApp(firebaseConfig);
const analytics = getAnalytics(app);