Node.js as Rails replacement? [duplicate]

Question

Possible Duplicate:
Could node.js replace Ruby on Rails completely in the future?

I'm doing bad in understanding the sense of node.js. I understand what it does regarding IO etc., but is it for example a Ruby on Rails replacement? Can I do the same database operations etc.? What about authentication?

what kind of web or other applications get build on basis of node.js?

Answer 1

is it for example a ruby on rails replacement?

IMHO RoR has much longer history/experience/functionality for website development. Node.js itself is a lightweight (low level) framework from which you can take off to build various types of server-side applications (not just web oriented). One of its main advantages is in wide spectrum of modules provided by community of open source developers.

Can i do the same database operations etc.?

Yes, just find the right module for your type of database.

What about authentication?

Modules like connect offers built-in authentication functionality.