node.js - Global Variable in app.js accessible in routes?

Question

How do i set a variable in app.js and have it be available in all the routes, atleast in the index.js file located in routes. using the express framework and node.js

Answer 1

It is actually very easy to do this using the "set" and "get" methods available on an express object.

Example as follows, say you have a variable called config with your configuration related stuff that you want to be available in other places:

In app.js:

var config = require('./config');

app.configure(function() {
  ...
  app.set('config', config); 
  ...
}

In routes/index.js

exports.index = function(req, res){
  var config = req.app.get('config');
  // config is now available
  ...
}