Discovering the process of retrieving information from Firebase using getServerSideProps in NextJs

I've been exploring ways to retrieve data from Firebase within GetServerSideProps in NextJs

Below is my db file setup:

import admin from "firebase-admin";
import serviceAccount from "./serviceAccountKey.json";

if (!admin.apps.length) {
  try {
    admin.initializeApp({
      credential: admin.credential.cert(serviceAccount),
    });
  } catch (error) {
    console.log("Firebase admin initialization error", error.stack);
  }
}
export default admin.firestore();

Next, I use getServerSideProps to fetch the data:

export async function getServerSideProps(context) {
  const id = context.params.profileId;
  const doc = await db.collection("profile").doc(id).get();
  const profile = doc.data();
  return {
    props: { profile },
  };
}

An error message appears saying:

error - ./node_modules/@google-cloud/storage/build/src/bucket.js:21:0
Module not found: Can't resolve 'fs'

I'm wondering if there's an alternative method to interact with Firebase that doesn't rely on a Node Library requiring access to the filesystem. Any suggestions or workarounds would be greatly appreciated.

Thank you!

Answer №1

If you are utilizing the firebase-admin package, it can only be used in API functions and cannot be imported on the client side due to its reliance on the fs module which is unavailable there. For client-side Firebase usage, consider using the @firebase/app npm module.

import { initializeApp, getApps } from 'firebase/app'
import { getAnalytics } from 'firebase/analytics'
export const createFirebaseApp = () => {
  const clientCredentials = {
    apiKey: process.env.NEXT_PUBLIC_FIREBASE_API_KEY,
    authDomain: process.env.NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN,
    databaseURL: process.env.NEXT_PUBLIC_FIREBASE_DATABASE_URL,
    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_MEASUREMENT_ID,
  }

  if (getApps().length <= 0) {
    const app = initializeApp(clientCredentials)
    // Check that `window` is in scope for the analytics module!
    if (typeof window !== 'undefined') {
      // Enable analytics. https://firebase.google.com/docs/analytics/get-started
      if ('measurementId' in clientCredentials) {
        getAnalytics()
      }
    }
    return app
  }
}

You may have two separate Firebase configuration files: one for client-side using the above approach, and another for utilizing firebase-admin as specified.

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