Mongoose Pagination #NodeJS #Express #MongoDB

pagine.js

var mongoose = require('mongoose');

mongoose.Query.prototype.paginate = function(page, limit, callback) {
	var query = this
		, page = page || 1
		, limit = limit || 10
  	, offset 	= (limit * page) - limit;
	
	query = query.skip(offset).limit(limit);
	
	if(callback){
		query.exec(function(err, data) {
			if(err){ callback(err, null, null) }
			else {
				query.model.count(query._conditions, function(err, count) {
					callback(null, count, data);
				});
			}
		});
	} else {  throw new Error('pagination needs a callback as the third argument.'); }
};

router.js

paginate = require('./lib/pagine')

var database = require('./config/database')
	, User = require('./foster').User


  // ...

exports.threads = function(request, response) { 
  response.setHeader("Content-Type", "application/json");
  User.find({}).paginate(request.query.page, 10, function(err, count, data) {
    response.end(JSON.stringify(data));
  });
}