Use data retrieved from database with javascript

Question

Use data retrieved from database with javascript

I have this code

App.Model('users').find(function (err, users) {
        users.forEach(function(user) {
        console.log(user.username);
    });
});

//make usernames availible here.

This console logs the usernames. Instead of just logging to the console I want make use of the data.

But How can do this?

Thanks

javascript
function
node.js

Answer 1

They will never be available where you want them. This isn't how async/node.js programming works.

Possible:

App.Model('users').find(function (err, users) {
    users.forEach(function(user) {
        myCallBack(user);
    });
});

var myCallBack = function(user) {
    //make usernames availible here.
    //this will be called with every user object
    console.log(user);
}

Other possibilites: EventEmitter, flow controll libraries (e.g. async).

If you have written code in other languages before you need to be open to take a complete new approach how data will be handled.

Answer 2

With node js you don't do:

//make usernames availible here.

You do:

App.Model('users').find(function (err, users) {
    //usernames are available here. Pass them somewhere. Notify some subscribers that you have data.
});

//The code here has executed a long time ago