Problem
You would like to get access to the facebook app_id or secret_id in your Rails application.
Solution
You can use the following in your console/app:
Devise.omniauth_configs[:facebook].args[0]
Problem
When trying to use facebooker according to the Developing facebook platform applications with rails book, in the network_test step you are getting the following error:
FBML Error (line 5): illegal tag "body" under "fb:canvas"
Solution
It should be caused because you are using the facebooker gem instead of the plugin.
Install the plugin:
ruby script/plugin install git://github.com/mmangino/facebooker.git