dataloader-results

High order functions for dataloader. It is useful to return compliant results (ordered and same length as ids array)

• Promise aware
• Only vanilla js and optimized

Install

npm i -S dataloader-results

Example

const { orderedResults } = require('dataloader-results');

...

const getObjectsByIds = (ids) => ...
const dataLoader = new DataLoader(orderedResults(getObjectsByIds));

Promise.all([
  dataLoader.load(1),
  dataLoader.load(2),
  dataLoader.load(3),
  dataLoader.load(4),
]).then((r) => {
  ...
})

API

orderedResults()

orderedResults(
  batchFetcher: (ids: a[]) => r[],
  optionalIndexer: r => a,
): (ids: a[]) => r[]

Accept a function (batchFetcher) that fetch synchronuously or asynchronuously data using ids array.

orderedResults() orders results returned by batchFetcher and if a result is missing, it returns null instead of nothing.

optionalIndexer is used to index result array returned by batchFetcher. Return value type must be the same as array of ids. Default indexer is defined to r => r.id;