Question

For example suppose in designing a blog application I want something like

domain.com/post/729

Instead of

domain.com/post/4f89dca9f40090d974000001

Ruby has the following

https://github.com/hakanensari/mongoid-slug

Is there an equivalent in Node.js?

Answer 1

There are a few ways :

1- Assuming you are trying to provide a unique id to each blog post .
Why not overwrite the ‘_id’ field of your documents in the blogs collection ?
Sample document would be :

{ "_id" : 122 , "content" : { "title: ..... }

You will have to look out for a method to generate an autoincrement id though, which is pretty easy.
This type of primary keys are however not recommended.
http://www.mongodb.org/display/DOCS/How+to+Make+an+Auto+Incrementing+Field

2- Let the _id field remain as it is, and additionaly store a key ‘blogid’ which is an integer, you will have to run ensureIndex on ‘blogid` field though to make access by blogid fast. Storage overhead would be minor, as you will be storing a keyname and an integer more in your document.

Sample document would be :

{ "_id" : xxxxxxxxxx ,"blogid" : 122, "content" : { "title: ..... }