ruby - Rails & Mogli - get users friends' ids -

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I am using Rail 3 & amp; To connect with Facebook, Mogul this code gives me a user object. 

  client = mogli :: client.new (session [: at]) user = mogli :: user.find ("me", client)   
 I have seen from documentation that there are classes for all object types in Mogul (example: album, event, etc.) but I do not know how to recover connections. (Example: Friends)  
 Actually I have to meet a list of user's friends with their ID. Because  user.friends  has only an array of their names.  
 Any thoughts?   
 
 
 make a mistake I'm stupid.  @ user.friends  is an array  mobile :: user  objects  @ user.friends.inpect  call them to  to_str  having had.

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