I tried Rails4.0.0rc2 in RubyMine 5.4.
But, RubyMine shows me the error 'No Rails found in SDK'.
I installed Rails and other Gems into the vendor/bundle directory in Project Folder.
I guess that RubyMine could not detect rails in the vendor/bundle directory.
( I don't like to install rails in ruby environment directly. )
How do I solve this problem?