This is my config in app.js:
var express = require('express')
, routes = require('./routes')
, user = require('./routes/user')
, http = require('http')
, path = require('path')
, Server = mongo.Server
, Db = mongo.Db;
, mongo = require('mongodb');
, BSON = mongo.BSONPure;
var app = express();
var server = new Server('localhost', 27017, {auto_reconnect: true, });
var db = new Db('tasksdb', server); //i need to remove this "var" to access db in routes
db.open(function(err, db) {
if(!err) {
console.log("Connected to 'tasksdb' database");
db.collection('tasks', {safe:true}, function(err, collection) {
if (err) {
console.log("The 'tasks' collection doesn't exist. Creating it with sample data...");
populateDB();
}
});
}
});
app.get('/', routes.index);
app.get('/tasks', routes.getAllTasks);
In routes/index.js i have:
exports.index = function(req, res){
res.render('index', { title: 'Express' });
};
exports.getAllTasks = function (req, res) {
db.collection( 'tasks', function ( err, collection ){ //this "db" is not accessible unless i remove "var" from db in app.js
collection.find().toArray( function ( err, items ) {
res.send(items);
})
})
};
it is of course not working unless i remove "var" from "db" in app.js, then it became global and i can access it in routes, but i don't want globals in my code and don't want to move controllers actions to app.js file. How to fix it ???
I'm not sure I understand. Isn't db
global with or without var
( it looks like a global scope for me )? Besides, why don't you want it to be global? That's a good example of using globals.
But it won't get shared between files. You have to add it to exports. Try this:
app.js
exports.db = db;
routes/index.js
var db = require("app").db;
The other way is to add db
to every handler like this:
app.js
app.use(function(req,res,next){
req.db = db;
next();
});
app.get('/', routes.index);
app.get('/tasks', routes.getAllTasks);
Then it should be available in any route as req.db
.
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