I am trying to use some of these functions with promises and it doesn't work. <p d

So what I have done is this: <div class="highlight highlight-source-js notranslate

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Working with promises about deepdash HOT 2 CLOSED

emahuni commented on May 27, 2024

Working with promises

from deepdash.

Comments (2)

emahuni commented on May 27, 2024

So what I have done is this:

const vows = [];
_.eachDeep(filters, (val, key, parent, ctx) => {
   // ...
  vows.push(someAsyncFn(val).then(res=>parent[key] = res);
}, { leavesOnly: true, checkCircular: true });
await Promise.all(vows)

I wish this could be done internally. You see the ...deep functions just have to detect if the callback is an async function, and do exactly like above before returning the modified obj. They do the then and setting of the parent[key].

Detection of async function and vow keeping can be achieved like so:

 if (cb instanceof Object.getPrototypeOf(async function () {}).constructor) {
    vows.push(cb(value, key, parent, ctx).then(res => parent[key] = res));
  } else {
    parent[key] = cb(value, key, parent, ctx); // normal callback function
  }
// ... then finally, before we return everything we return a promise that awaits the vows, but resolves to the object
return Promise.all(vows).then(res=>originalObjWeWereIterating)

That will allow the functions to be used like so:

filters = await _.eachDeep(filters, async (val, key, parent, ctx) => {
   // ...
  return parent[key] = await someAsyncFn(val);
}, { leavesOnly: true, checkCircular: true });