Question

basically I am wondering how you would go about in Couchdb as you would in MysQL: storing username, password in one table and link the user id as foreign key on another table of tasks?

should I just use mysql for the user authentication part and couchdb to store lots of user submitted documents? so create a random unique token to link each user to their “documents” on couchdb?

also I am looking to store Java objects to the couchdb, and retrieve them to be used directly in my application. which Java-couchdb library does this? Ektorp’s example is seems more complicated compared to couchdb4j.

Answer 1

I do not know Java very well, but I suggest use the most simple tool you find. CouchDB is very simple and usually it is most beneficial to access it with simple tools too.

Yes, if you will have many relationships in the data, MySQL will help. However CouchDB can do some simple has-many queries.

First, there is view collation. You use map/reduce, and for every “child” document, you emit a key pointing to the parent document. When you query for ?key=parent then you get a long list of children. (The wiki explains it pretty well.)

Secondly, I suggest the article What’s new in CouchDB 0.11 which shows how to use document _ids to link between two documents.

Good luck!