ID navigation with offline creations

[Morzaram]

Hey there I was wondering if there's a strategy to do ID navigation. Scenario:
App is offline first

1. user creates a new post
2. Redirects the user to the post through a router /posts/:id
3. User hits button to sync data
4. ???
5. Server and post have same ID

If the post has a local only ID how do I save it safely to the server and have both IDs in sync?
My first thought is to make some sort of way where I replace the ID where on reconnect I delete ID, save and then replace it via withKeyOf. But I'm not sure if I'm over complicating things and theres an easier way. Trying to rack my brain around it.

Reason why I'm doing this is that I want an offline first approach where people can only sync their data if they want. Ie: a click of a button.

Thank you in advance as always ❤️

[Morzaram]

Edited for clarity

[frank06]

FD should automatically handle ID updates from a remote API: https://github.com/flutterdata/flutter_data/blob/master/test/repository/repository_test.dart#L265

You could use UUIDs for offline/un-synced models. Once synced they accept whatever the server returned, could either (a) keep the UUID or (b) be replaced by an auto-increment . Up to you how to handle a potential redirect in the UI

[Morzaram]

Ah, okay, this makes a lot of sense! Thank you!
So basically, on my server, if the ID doesn't exist, then I should make it if it's a PATCH request. Right?
Or should I do it locally where I make a column with isOnServer = false. if isOnServer == false, then set to POST. 🤔

Thanks for your patience. I come from a SSR background and being this far away from the server is still so new to me

[frank06]

Easiest would be to work only with UUIDs. Server accepts whatever UUID the client has generated. If it does not exist write a DB row, if it exists update the row.

By default, if there is an ID present in the model the HTTP method will be PATCH, otherwise POST. You can override this via methodForSave() in your adapter (see docs). Same with urlForSave()

[frank06]

I also recommend you enable FD logging to get a better idea of what's going on. https://flutterdata.dev/docs/repositories/#logging-and-labels

[Morzaram]

Thank you so much for your help as always! If there's a way for me to donate or sponsor you? I want to compensate you some how.

[frank06]

No worries! Thank you