ataractic•16mo 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•16mo ago

Hmmm its reading from same db right? 🤔

ataracticOP•15mo ago

yes

NDH•15mo ago

What does getAllJobs() look like?

ataracticOP•15mo ago

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

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

NDH•15mo 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•15mo 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

NDH•15mo ago

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

ataracticOP•15mo ago

thanks you for trying :)

cknight•15mo ago

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

fro.profesional•15mo ago

That will create another db

iuioiua•15mo ago

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

ataracticOP•15mo 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•15mo ago

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

ataracticOP•15mo ago

sure!