Cannot find module 'express-session'

Question

I am trying to run sparkleshare-dashboard. This is an open source project you can see it here https://github.com/tommyd3mdi/sparkleshare-dashboard.

The project use Node.JS and Redis and i have no experience with both. I did setup the environment as described in the help file and then i try to run file app.js from command line using 'node' command but i got this error.

Error: Cannot find module 'express-session'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (E:\Imports\sparkleshare-dashboard\app.js:5:15)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)

Maybe i didn't provide enough information but i am expecting that may be some of you guys has done some work on sparkleshare project and may someone can help me in this.

Answer 1

The reason is likely your ">" operator for express in the package.json. Express 4.0 is out now and the complete middleware concept changed. You need to install these middlewares manually. "express-session" is one of the 4.0 middlewares.

I recommend to read

http://scotch.io/bar-talk/expressjs-4-0-new-features-and-upgrading-from-3-0 and https://github.com/visionmedia/express/wiki/Migrating-from-3.x-to-4.x

Additionally some users were confused that the github repo is named just "session" but

npm install express-session

is correct.