Unnesting Node database calls

Question

I have an ordinary

var express = require(\'express\')

Node express www page, using session, pug, etc as usual. My db calls

var         


        

Answer 1

If your database calls returned promises instead of using callbacks, you could:

const cats = await db.cats();
const dogs = await db.dogs();
const budgies = await db.budgies();

res.render('bigScreen.pug', {
  cats : cats,
  k9s: dogs,
  budgies: budgies,
  pretty : true
});


// Or request them all in parallel instead of waiting for each to finish
const [
  cats,
  dogs,
  budgies
] = Promise.all([
  dg.cats(),
  dg.dogs(),
  db.budgies()
]);