Comments (2)
That's an interesting question! And I would like to take some time for discussion and to think about this before presenting a possible "goto" solution.
Here's whats coming to mind. (I don't have time to fully validate this right now, will do in the coming days)
Adding null
or undefined
as option for the Entry
is definitely the way to go. But currently that would also store these values in cache and only revalidate them once their TTL is over. If that's what you intend you're good to go 👍
A scenario that is not possible right now (I think) would be when you want to NOT store the missing null
in cache and have getFreshValues
try to get them again asap.
from cachified.
I've added/updated two sections about this to the readme and added the functionality to fine-tune cache-metadata in batch requests in the latest release v3.2.0.
see Fine-tuning cache metadata based on fresh values (This was already possible but not well documented, though this does not use createBatch
the concept will also apply there)
I've also updated Batch requesting values to show the new onValue
callback.
With this in mind here's what I'd do.
- First and foremost, yes you want to add
null
,undefined
or similar to the array you're expecting from thePromise.all
- If you want to cache the information that you received an empty values exactly the same as the non-empty values, you don't need anything else.
If you want to not cache empty values or cache them for a much shorter time do something like this:
const batch = createBatch((ids): Promise<(string | null)[]> => {
/* ... */
});
const values: (string | null)[] = await Promise.all(
ids.map((id) =>
cachified({
/* cache and other options... */
key: `entry-${id}`,
ttl: 60_000,
getFreshValue: batch.add(id, ({ value, metadata }) => {
if (value === null) {
/* -1 disables caching, you could also just set to a shorter time */
metadata.ttl = -1;
}
}),
})
)
);
from cachified.
Related Issues (20)
- Performance: support batch-operations on caches
- TTL must be slightly longer than the time it takes for the promise to resolve. HOT 16
- redisCacheAdapter does not cache if ttl is set because of the HOT 1
- Article on simple caching: a review/simplification? HOT 3
- Let getFreshValue know whether the update is happening in the background or not HOT 7
- Allow me to control the cache time based on the fresh value HOT 6
- Cachified doesn't work with Astro.build HOT 7
- Redis Cache support HOT 9
- Update the example in the docs to use a more "realistic" example HOT 1
- Optionally support zod validators
- Add support for redis-json HOT 4
- Add support for "soft purge" HOT 8
- Make Cache type not use Value HOT 3
- swv? Shouldn't it be swr? HOT 4
- Adding a reporter changes return type of `getFreshValue` to `unknown` HOT 3
- [RFC - New Adapter] Create new Cloudflare KV cache adapter HOT 6
- move into epicweb-dev? HOT 10
- Adapter bug with `swr` set to `Infinity` HOT 1
- Requests are not de-duplicated if there is no `ttl` HOT 7
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