Rails - Feb 2012 - Need Suggestion: how to Fetch Facebook information using the facebook_id in rails 3.1

Hi,

  I am the Newbie to rails and fb_graph.I have a rails3.1 app with
authlogic authentication. all of users can the register with the
facebook_id in my app.  what i am  suppose to do means if any one user
can see the others facebook profile using the facebook_id. if there is
any possiblity or not.

Any samples like this or some example are available.  .

Thanks in advance.

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