Twitter API in ruby on rails application

Hi,

I am developing a ruby on rails application for getting all users tweets from twitter after twitter login from my application I am able to get user_id,email,provider,name etc from twitter login but I want to use Twitter Api to get all the tweets of the user who is doing twitter sign in from my application

I followed this post “http://www.arctickiwi.com/blog/download-you-twitter-feed-using-ruby-on-rails-with-oauth”.It is using grackle gem to get the users post but problem is it is only showing my twitter post if other person doing login in it shows same post not new user’s posts.

There are so many twitter API available to use for example you can get status,user_timeline,direct_messages etc. see this one

http://www.oreillynet.com/pub/a/web-services/excerpts/9780596154615/meet-twitter-api.html#hello_twitter

I want to know which API can be used to get all user tweets and how in my rails application

Help or suggestions???

Thanks