What steps can you take to resolve the issue of FirebaseError: When collection() is expected to be a CollectionReference, DocumentReference, or FirebaseFirestore?

Question

What steps can you take to resolve the issue of FirebaseError: When collection() is expected to be a CollectionReference, DocumentReference, or FirebaseFirestore?

I'm currently working on integrating Firebase with next.js, and I've encountered an error in the console that reads:

FirebaseError: Expected first argument to collection() to be a CollectionReference, a DocumentReference or FirebaseFirestore

Below is a snippet of the custom hook causing the issue:

import { onAuthStateChanged, User } from '@firebase/auth'
import { doc, onSnapshot, Unsubscribe } from 'firebase/firestore'
// rest of the code

In addition, I have a firebase.ts file where I set up my Firebase app configuration.

import { FirebaseApp, getApps, initializeApp } from 'firebase/app'
import { getAuth } from 'firebase/auth'
// rest of the code

I suspect that the problem lies within the custom hook file, particularly with the onSnapshot function. Could it be an issue with how I'm passing the docRef? Any insights would be greatly appreciated!

The console.log(firestore) log reveals:


    type: "firestore-lite"
    _app: FirebaseAppImpl
    // more details about firestore object

javascript firebase google-cloud-firestore firebase-authentication next.js

Answer 1

Answer №1

When using getFirestore from the lite library, it may not be compatible with onSnapshot. It seems that you are importing getFirestore from the lite version:

import { getFirestore } from 'firebase/firestore/lite'

To resolve this issue, update your import statement to:

import { getFirestore } from 'firebase/firestore'

According to the documentation,

The onSnapshot method and certain objects like DocumentChange, SnapshotListenerOptions, SnapshotMetadata, SnapshotOptions, and Unsubscribe are not available in the lite version.

Another possible reason for encountering this error could be due to passing an invalid first argument to the collection() or doc() functions. Both of these functions require a Firestore instance as the first argument.

// Ensure that "db" is defined and initialized
const db = getFirestore();
// console.log(db);

const colRef = collection(db, "collection_name");

Answer 2

When using getFirestore from the lite library, it may not be compatible with onSnapshot. It seems that you are importing getFirestore from the lite version:

import { getFirestore } from 'firebase/firestore/lite'

To resolve this issue, update your import statement to:

import { getFirestore } from 'firebase/firestore'

According to the documentation,

The onSnapshot method and certain objects like DocumentChange, SnapshotListenerOptions, SnapshotMetadata, SnapshotOptions, and Unsubscribe are not available in the lite version.

Another possible reason for encountering this error could be due to passing an invalid first argument to the collection() or doc() functions. Both of these functions require a Firestore instance as the first argument.

// Ensure that "db" is defined and initialized
const db = getFirestore();
// console.log(db);

const colRef = collection(db, "collection_name");

Answer 3

Answer №2

Avoid mixing `firestore/lite` with `firestore` in your project

Make sure to only use one of the following in your imports:

'firebase/firestore'

OR

'firebase/firestore/lite'

Avoid using both in the same project.

Upon checking, the `firebase.ts` file is importing:

import { getFirestore } from 'firebase/firestore/lite'

While in your hook:

import { doc, onSnapshot, Unsubscribe } from 'firebase/firestore'

This means you are initializing the lite version but then using the full version later on.

Both versions have their own advantages, but for consistency, it's recommended to choose one and stick with it to resolve the issue.

Answer 4

Avoid mixing `firestore/lite` with `firestore` in your project

Make sure to only use one of the following in your imports:

'firebase/firestore'

OR

'firebase/firestore/lite'

Avoid using both in the same project.

Upon checking, the `firebase.ts` file is importing:

import { getFirestore } from 'firebase/firestore/lite'

While in your hook:

import { doc, onSnapshot, Unsubscribe } from 'firebase/firestore'

This means you are initializing the lite version but then using the full version later on.

Both versions have their own advantages, but for consistency, it's recommended to choose one and stick with it to resolve the issue.

Answer 5

Answer №3

Expanding on what @Dharmaraj mentioned, when working with firebase react hooks, it is recommended to utilize the reverse approach.

Instead of

import { getFirestore } from 'firebase/firestore'

Opt for

import { getFirestore } from 'firebase/firestore/lite'

Answer 6

Expanding on what @Dharmaraj mentioned, when working with firebase react hooks, it is recommended to utilize the reverse approach.

Instead of

import { getFirestore } from 'firebase/firestore'

Opt for

import { getFirestore } from 'firebase/firestore/lite'

Answer 7

Answer №4

If you happen to be utilizing firebase lite, remember that the collection is not utilized.

Take a look at this example using Firebase Lite:

import {
 getFirestore,
 getDoc,
 updateDoc,
 doc
} from '@firebase/firestore/lite';

const firestore = getFirestore(app);
const docRef = doc(firestore, 'collection/doc');
const docSnap = await getDoc(docRef);
await updateDoc(docRef, "field", 'value');

Choosing Firestore Lite Wisely
Deciding whether to stick with the standard Firestore SDK's offline persistence and caching features or switch to Firestore Lite can be challenging. It is important to have a good understanding of these features before making a decision. Consider these factors when weighing the options for using Firestore Lite:

Online Status - Firestore Lite is suitable for apps that do not require real-time updates and are consistently connected.
Reducing Bundle Size - Firestore Lite is beneficial if you aim to minimize your JavaScript bundle size.

Learn more here

Answer 8

If you happen to be utilizing firebase lite, remember that the collection is not utilized.

Take a look at this example using Firebase Lite:

import {
 getFirestore,
 getDoc,
 updateDoc,
 doc
} from '@firebase/firestore/lite';

const firestore = getFirestore(app);
const docRef = doc(firestore, 'collection/doc');
const docSnap = await getDoc(docRef);
await updateDoc(docRef, "field", 'value');

Choosing Firestore Lite Wisely
Deciding whether to stick with the standard Firestore SDK's offline persistence and caching features or switch to Firestore Lite can be challenging. It is important to have a good understanding of these features before making a decision. Consider these factors when weighing the options for using Firestore Lite:

Online Status - Firestore Lite is suitable for apps that do not require real-time updates and are consistently connected.
Reducing Bundle Size - Firestore Lite is beneficial if you aim to minimize your JavaScript bundle size.

Learn more here

Answer 9

Answer №5

If you find yourself in a situation where both @firebase/firestore and firebase are installed with different versions, this issue can arise.

firebase actually includes @firebase/firestore, so it's best to uninstall any @firebase/... dependencies to ensure that you are using the same version as firebase.

Answer 10

If you find yourself in a situation where both @firebase/firestore and firebase are installed with different versions, this issue can arise.

firebase actually includes @firebase/firestore, so it's best to uninstall any @firebase/... dependencies to ensure that you are using the same version as firebase.

Answer 11

Answer №6

One of the key reasons in my situation, besides what others have mentioned, is that I was following an outdated tutorial using Next.js 13 and Firebase v9.

In my firebase.tsx file, which serves as the configuration for Firebase itself, it was referencing /lite.

I made the following change:

    import { getFirestore } from "firebase/firestore/lite";

And updated it to this:

    import { getFirestore } from "firebase/firestore";

Answer 12

One of the key reasons in my situation, besides what others have mentioned, is that I was following an outdated tutorial using Next.js 13 and Firebase v9.

In my firebase.tsx file, which serves as the configuration for Firebase itself, it was referencing /lite.

I made the following change:

    import { getFirestore } from "firebase/firestore/lite";

And updated it to this:

    import { getFirestore } from "firebase/firestore";

Answer 13

Answer №7

Encountered a similar problem. The source turned out to be Firebase being integrated into a separate directory within a monorepo, causing dual instances of Firestore to run concurrently.

By consolidating the initialization process to a single location, the problem was successfully resolved.

Answer 14

Encountered a similar problem. The source turned out to be Firebase being integrated into a separate directory within a monorepo, causing dual instances of Firestore to run concurrently.

By consolidating the initialization process to a single location, the problem was successfully resolved.

What steps can you take to resolve the issue of FirebaseError: When collection() is expected to be a CollectionReference, DocumentReference, or FirebaseFirestore?

Answer №1

Answer №2

Avoid mixing `firestore/lite` with `firestore` in your project

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

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