CODEWITHSUNDEEP
typescriptfirebasegoogle-cloud-functions
Chaddeus
Chaddeus

Reputation: 13366

Using Firebase Admin SDK, Unable to Deploy Firebase Cloud Functions Split Across Multiple Files: "The default Firebase app already exists"

When I try to use initializeApp() in a new Firebase cloud function (organized in a separate file, exported via index.ts), I get the error: "The default Firebase app already exists"

I have three files, index.ts, http.ts, and pubsub.ts.

index.ts:

export { function1 } from './http'

export { function2 } from './pubsub'

http.ts (already using initializeApp and has been working great):

import * as functions from 'firebase-functions'
import fetch from 'node-fetch'
import { initializeApp } from 'firebase-admin/app'
import { getFirestore } from 'firebase-admin/firestore'

const app = initializeApp()
const db = getFirestore(app)
const config = functions.config()

export const function1 = functions...

I need to use app in another file, pubsub.ts:

import * as functions from 'firebase-functions'
import { initializeApp } from 'firebase-admin/app'
import { getAuth } from 'firebase-admin/auth'
import { getFirestore } from 'firebase-admin/firestore'

const app = initializeApp()
const auth = getAuth(app)
const db = getFirestore(app)

export const function2 = functions...

I've seen suggestions such as !admin.apps.length ? admin.initializeApp() : admin.app(); but I'm using the latest version of Firebase Admin SDK and it's not imported the same way.

Additionally, I imagine once I manage to resolve the issue of initializeApp, the same will occur with db -- as it is used in both as well.

I checked the Firebase docs and I don't see mention of using the Firebase Admin SDK when cloud functions are organized into separate files (it does discuss organizing functions like this, however).

Thanks in advance. 🙏

Upvotes: 1

Views: 537

Answers (2)

noo
noo

Reputation: 252

I think the problem is that you are initialising admin app. You import:

import { initializeApp } from 'firebase-admin/app'

This is fine if you want to perform some admin SDK logic like verifyIdToken. Basically anything from here: https://firebase.google.com/docs/auth/admin.

I think you should import it like this: import {getApp, initializeApp} from "firebase/app"; if you want to have your client app initialised. Then you can call getAuth or getFirestore from web client Firebase SDK. Anything from here: https://firebase.google.com/docs/auth/web/start

Upvotes: 0

Stf_F
Stf_F

Reputation: 1164

the getApp() and getApps() methods look like solid candidates to check whether your app is already initialised: https://firebase.google.com/docs/reference/js/app.md#getapp and perform conditional initialisation based on this.

Upvotes: 1

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