@dalisoft/batch-collect

batchCollect

Collect calls and make them batching

Mostly use this for solving 1+N (N+1) problem

Features

• Fast
• Automatic handling
• No duplication
• Almost zero-config
• Flexible
• On browsers works too
• Types declaration for IDE/Editor

Import

// ES6
import batchCollect from "@dalisoft/batch-collect";

// or

// CommonJS
const batchCollect = require("@dalisoft/batch-collect");

// or

const batchCollect = window.batchCollect;

Example

Basic example

const batchQuery = batchCollect(async collects => {
  await timeout(500);

  return collects.map(requestToSomeWhere);
});

batchQuery(() => `getUser { id, name }`, user => doSomething(user));

await batchQuery(async () => {
  await timeout(100);
  return `getAsync { result }`;
});

batchQuery(`getProfile {id, avatar}`);

N+1 problem solve example

const batchSQL = batchCollect(async ids => {
  return orm.getByIds(ids);
});

batchSQL(() => id, row => doSomething(row));

// This code is executes from different place than above query
// and both code exetudes once, on DB requests will be called once
batchSQL(id, row => doSomething(row));

For more info see tests.

License

MIT