'session' is undefined when using express / redis for session store

I'm trying to use redis for sessions in my express app.

I do the following:

var express = require('express');
var RedisStore = require('connect-redis')(express);

app.configure('development', function(){     
    app.use(express.session({ secret: "password", 
                            store: new RedisStore({
                                          host: "127.0.0.1",
                                          port: "6379",
                                          db: "mydb"
                                        })  
          }));

Later on, in my app, if i do something like:

var whatever = req.session.someProperty;

I get:

Cannot read property 'someProperty' of undefined

This indicates that req.session is undefined (I can see this from a console.log entry in my config section)

I've definitely got redis running, and can see my app connects to it initially (using redis-cli monitor)

Sessions won't work unless you have these 3 in this order:

app.use(express.cookieParser());
app.use(express.session());
app.use(app.router);

I'm not sure if router is mandatory to use sessions, but it breaks them if it's placed before them.

Looks like you're missing:

app.use(express.cookieParser());

before your app.use(express.session(...)); call.

See here.