Is there any way to obtain the size (count) of a list of mongodb collection using the following stack : nodejs+express+mongodb+monk
I went thus far before getting lost in forest of promises.
EDIT : was on mobile stackoverflow, here's the code. Note that code below is from recalling, I didn't actually run it through node as I'am AF(P)K currently.
EDIT2 : actually adding my code now.
// app.js
// ...
var express = require('express');
// ... some more globals goes here
var mongodb = require('monogdb');
var monk = require('monk');
var api = require('./routes/api');
var db = monk('monogdb://localhost/overland');
var app = express();
// ....
// shove db to every incoming request (as seen here : http://cwbuecheler.com/web/tutorials/2013/node-express-mongo/)
app.user(function(req,res,next){
req.db = db;
next();
});
// ready the route
app.use('/api', api);
// ....and the rest of the usual express-generated code goes here
...here's my route/api.js contents
// routes/api.js
// ...
var express = require('express');
var router = express.Router();
router.get('/qstat', function(req, res){
var db = req.db;
var qnames = req.query.qnames ? req.query.qnames.split(',') : [];
console.log(qnames);
var stats = {};
qnames.forEach(function(qname){
db.get(qname).count({}).then(function(doc){
stats[qname] = doc;
});
});
res.set('Content-Type', 'application/json');
res.send(stats);
});
module.exports = router;
I'm expecting that when I do this...
curl -G http://localhost:3080/api/qstat?qnames=u3020,u3021,u3033
I'll be left with this...
{ 'u3020' : 442, 'u3021' : 143, 'u3033' : 3}
where each keys are mongo collection names and the values are their counts.
...instead I'm always left with this :
{}
I am aware that that's not how I should deal with promises and async processes. This was intended as a quick and dirty way to gather simple statistics from some mongo collections that are used as queues at work.
