Is there any solution to update every post's user name when you change your username?

Question

I'm making an iOS SNS app using firebase. In my app, you can change your username in the setting. But even after you change your username, username in posts that you before posted is still your old username because each post includes your username when you posted it.

Thanks in advance!

You should use firebase cloud functions. https://firebase.google.com/docs/functions/ — Fabio Campinho, Sep 06 '17 at 00:48
I am curious about the data structure needed to accomplish this. — J. Doe, Sep 06 '17 at 01:05
See https://stackoverflow.com/questions/30693785/how-to-write-denormalized-data-in-firebase for the approaches I commonly see. — Frank van Puffelen, Sep 06 '17 at 02:25

score 0 · Answer 1 · answered Sep 06 '17 at 00:52

As far as I know you can't trigger onWrite() on authentication properties. Maybe you can store the username in your database and use it as the author of each post. Then you can use cloud functions to listen to 'user' node changes and update all posts whose author is equal to the previous username (better user an ID to handle this update).

Hope it helps. Maybe someone else have a better idea.

Is there any solution to update every post's user name when you change your username?

1 Answers1