Adding Search feature in Rails 3 application

I have developed a database backed 开发者_JAVA百科application in Rails 3 www.pajamadeals.in . Now, I intend to include search feature in it. Where people can search books, instruments, etc. How do I implement search feature. Any gem or plugin recommendation? Should I roll my own code for search capability?

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There are couple of gem is usefull for full text searching

1) You can use thinking-sphinix,for quick start up you can refer http://railscasts.com/episodes/120-thinking-sphinx,

2) You can use solr you can refer http://railscasts.com/episodes/278-search-with-sunspot

3) Elastic Search

Sphinix is a good solution fr easy start.