what do you mean by "keep fetching"?

# android

[Dustin Lam]

what do you mean by "keep fetching"?

[Saiedmomen]

keeps prepending data with previous keys.

[Dustin Lam]

do you expect it to stop because you reached prefetch distance or because you ran out of data to load?

[Saiedmomen]

for example if init key is zero, it imediately fetches -1 and then immediately -2 and so on.

[Dustin Lam]

are those pages you're loading with key = -1, etc empty?

[Saiedmomen]

no

[Saiedmomen]

I think the problem is that it scrolls to start of -1

[Dustin Lam]

is your layout nested scrolling by any chance?

[Saiedmomen]

it's compose lazycolumn

[Dustin Lam]

oh i see

[Dustin Lam]

that sounds like a bug, would you mind filing ine and attaching your project? ill find some time to take a look

[Dustin Lam]

but in general yes, loading in both directions is supposed to be supported

[dustin]

https://issuetracker.google.com/issues/new?component=413106&template=1096385

[Saiedmomen]

Ok. will do tomorrow. that would be awesome!

[dustin]

right now new page loads cause compose to re-compose the entire list, so that's probably part of the problem, but i am surprised it is affecting scroll position

[dustin]

thanks for bringing this up blob smile

[Saiedmomen]

Maybe its because it remembers current index zero, but after the prepend, index zero is start of -1.

[Saiedmomen]

@dustin
https://issuetracker.google.com/issues/183623944
Also Made a MWE.
Please let me know if I could help more.
Hope gets fixed soon 👍

[Dustin Lam]

Thanks!

[Saiedmomen]

@dustin Hey Dustin 🙂
Any news on this?

[Dustin Lam]

hey! it's on the queue, haven't forgotten about this 🙂 we need to do a bit of work on compose itself so we can support prepend and i have a meeting next week to discuss these exact changes