CODEWITHSUNDEEP
firebasefirebase-authenticationfirebase-admin
tobbe
tobbe

Reputation: 1805

Fetch multiple users

I have a list (uid's) of users that is connected to a group. On one page I want to list all usernames and emails of the users in the list.

What is the recommended way to fetch user data for each user? All I can find is in the admin sdk: admin.auth().getUser(uid)

  1. Is there no way to fetch multiple users in one request? ex admin.auth().getUsers([uid1, uid2, uid3])?
  2. Is there no way to do this in the client sdk?
  3. If 1. is not possible, is it not quite easy to reach the limits? https://firebase.google.com/docs/auth/limits#api_limits

Upvotes: 1

Views: 361

Answers (1)

Jaye Renzo Montejo
Jaye Renzo Montejo

Reputation: 1862

It's not possible to retrieve the list of all users with the client SDK, but you can do it in two ways:

Using the Firebase Realtime Database

  1. You can add a node of user names and emails, say /users in your database:

    {
  "users": {
    "user1": {
      "username": "user1",
      "email": "[email protected]"
    },
    "user2": {
      "username": "user2",
      "email": "[email protected]"
    }
  }
}

  2. Then just query this node using once('value'):

    const users = await firebase.database.ref('/userProfiles').once('value');
console.log(users);

Using a callable function and the Firebase Admin SDK

  1. Create an HTTPS callable function, say getAllUsers(), that retrieves all users. The Firebase Admin SDK has a way to list all users in batches of 1000.

  2. Deploy the function using firebase deploy --only functions:getAllUsers.

  3. Then call the function from the client:

    const getAllUsers = firebase.functions().httpsCallable('getAllUsers');
const users = await getAllUsers();
console.log(users);

Upvotes: 2

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