@Atlantic mackerel oh sorry I mixed up the cache functions, you can use React's cache: https://nextjs.org/docs/app/building-your-application/caching#react-cache-function

this will memoize the function only for the duration of the request

so you don't need to worry about revalidating it

yeah with unstable_cache you can basically use the same cache stuff from fetch

you use react's cache when you just want to avoid rerunning the same function from different places for the same request

I think it depends on how you are using redis, in my experience unstable_cache is a bit unreliable

but its still experimental so they will probably fix it

yeah thats fine

yeah the keyParts is used by next.js to store and find your cached value, the tags are necessary if you want to manually revalidate it with revalidateTag

they don't need to be the same, in your example I would use ["paste", slug] as the keyParts, but the tag is fine as a single string

what do you mean you can't access the variable? 🤔

is the variable defined?

ah true you don't have it yet

no thats a perfectly valid question

and I have no idea how to do it with a dynamic variable like that 😅

I recommend avoiding this function until it gets stable, the docs are very lacking at the moment

in this situation I would use the route segment config for the post pages

you can then use react's cache function to avoid querying the db twice

and revalidatePath to revalidate a specific page by its path

yeah I just found this in the repo: https://github.com/vercel/next.js/blob/3a923d5eda04cef563b89ec0c244d26d7fa7e5bb/test/e2e/app-dir/app-static/pages/api/unstable-cache-edge.js#L8

it looks like calling unstable_cache from within the function is a valid use case so this should be fine

oh probably not, most db drivers aren't supported on the edge runtime unfortunately

np

yes that is right, i just finally got my code working with unstable_cache. And to revalidate it you can either use revalidateTag, or if you use revalidatePath on the same page where you call unstable_cache it will revalidate it as well

the docs for unstable cache are definetely lacking, but kapa ai helped in #gpt-help so if you don't already use that you should try it out

cool, thanks for confirming it works! I will give it another try in the future 👀

@Atlantic mackerel please do not delete your messages after the question has been resolved. instead just mark the solution, then unfollow the post – no other actions required aside from these two.