ataractic•2y ago

Getting values from Deno KV in a Web Worker always return empty array despite working correctly o...

Getting values from Deno KV in a Web Worker always return empty array despite working correctly outside the worker context (in the parent app). What can cause this behavior?

14 Replies

fro.profesional•2y ago

Hmmm its reading from same db right? 🤔

ataracticOP•2y ago

yes

Fifth-Normal-Form•2y ago

What does getAllJobs() look like?

ataracticOP•2y ago

export async function getAllJobs() {
  return await getValues<Job>({ prefix: ["jobs"] });
}

export async function getAllJobs() {
  return await getValues<Job>({ prefix: ["jobs"] });
}

Fifth-Normal-Form•2y ago

I don't think I can help. I don't know what getValues<job> does. I assume at some point it's calling kv.list? Is the code in a public repo? Can we have a look?

ataracticOP•2y ago

yes sorry, here is getValues()

async function getValues<T>(
  selector: Deno.KvListSelector,
  options?: Deno.KvListOptions,
) {
  const values = [];
  const iter = kv.list<T>(selector, options);
  for await (const { value } of iter) values.push(value);
  return values;
}

async function getValues<T>(
  selector: Deno.KvListSelector,
  options?: Deno.KvListOptions,
) {
  const values = [];
  const iter = kv.list<T>(selector, options);
  for await (const { value } of iter) values.push(value);
  return values;
}

i use a lot of code from saaskit to help me

Fifth-Normal-Form•2y ago

I have no experience with saaskit; sorry. Hopefully someone with experience will jump in to help you.

ataracticOP•2y ago

thanks you for trying :)

cknight•2y ago

Have you tried Deno.openKv() in your worker?

fro.profesional•2y ago

That will create another db

iuioiua•2y ago

Sidenote: I'd actually recommend instead using collectValues(). It allows you to use iter.cursor once the values are collected.

ataracticOP•2y ago

i will do it once it can at least work, thanks for the tip! i went with another approach, using message events to send job data both ways between the main thread to the worker, and it works! however i'm pretty sure it impacts performance pretty badly as compared to the first idea.

iuioiua•2y ago

Actually, check SaaSKit out once v1 is released. We’ll have some noteworthy bits of the KV implementation worth looking at 👀

ataracticOP•2y ago

sure!

Getting values from Deno KV in a Web Worker always return empty array despite working correctly o...

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