Get data from multiple models for rendering

Question

If I want to display all resources on a page, I might do:

Resource.find({}).exec(function (err, resources) {                          
    res.render("view", {                                                   
        resources: resources

However, what if I want to display all resources and all projects on the page simultaneously? I could do:

Resource.find({}).exec(function (err, resources) {
    Projects.find({}).exec(function (err, projects) {
        res.render("view", {
            resources: resources,
            projects: projects

I think that there has to be a better/more correct way to do this, though.

Peter Lyons · Accepted Answer · 2013-08-06 18:29:48Z

2

var async = require('async');
var resourcesQuery = Resource.find({});
var projectsQuery = Projects.find({});
var resources = {
  resources: resourcesQuery.exec.bind(resourcesQuery),
  projects: projectsQuery.exec.bind(projectsQuery)
};
async.parallel(resources, function (error, results) {
  if (error) {
    res.status(500).send(error);
    return;
  }
  res.render("view", results);
});

This will make the queries in parallel instead of serial, which will probably be faster.

answered Aug 6, 2013 at 18:29

Peter Lyons

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