make async call inside forEach

Question

I am trying to iterate thru array of objects and add some stuff inside these objects using async function in Node.js.

So far my code looks like:

var          


        

Answer 1

Use async.each

async.each(channel, function(entry, next) {
    knex('albums')
         .select(knex.raw('count(id) as album_count'))
         .where('channel_id', entry.id)
         .then(function (terms) {
            var count = terms[0].album_count;
            entry.attributes["totalAlbums"] = count;
            next();
         });
}, function(err) {
    console.log("I want this to be printed once the foreach is finished");
    res.json({error: false, status: 200, data: channel});
});

The final callback will be called when all entries are processed.