Is a Firebase UID always 28 characters?

javascript firebase firebase-realtime-database firebase-authentication firebase-security
Finlay Percy picture Finlay Percy · May 11, 2017 · Viewed 8k times · Source

I am creating security rules for my Firebase project and wanted to add UIDstring.length == 28 to my database rules. All of my users UIDs are 28 characters, but I wanted to check if they can be any longer or shorter?

Thanks

Answer

Joe Clay picture Joe Clay · May 11, 2017

A Firebase developer had this to say on their forums:

I would not rely on a constant length for the UIDs forever. We chose the current value because it provides a big enough ID space while still being under the 36-character limit for Firebase Analytics user properties.

So, in other words, what you're suggesting may or may not fail in the future, so you probably should find a different way of implementing it that's more future-proof.

Related questions

Firebase Permission Denied

I'm relatively new to coding and am having trouble. I have this code to send data to firebase app.userid = app.user.uid var userRef = app.dataInfo.child(app.users); var useridRef = userRef.child(app.userid); useridRef.set({ locations: "", theme: "", …

Read More
Error: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp()

I have a firebase database linked up to two apps, one being an iOS app and another being a web app coded in node.js which is a basic algorithm that sets data to the database. When ever i am …

Read More
firebase.database is not a function

I am trying to upgrade from earlier firebase version to the latest in my ionic project. I followed this tutorial for upgrade. In step 4 from this page I am stuck on the last statement firebase.database().ref();. Error message TypeError: …

Read More