It's pretty easy to get any page you like on facebook, especially with the Koala gem. Since facebook is suitable for this page, publicly available ( see here ), you can access them without using the API key.
, : facebook.com/foofighters, :
graph = Koala::Facebook::GraphAPI.new
likes = graph.get_object("foofighters")["likes"]
, , , ( ) facebook? "" , - :
graph = Koala::Facebook::GraphAPI.new
@users.each do |user|
user.likes = graph.get_object(user.facebook_id)["likes"]
user.save
end