When trying to use restful-authentication plugin, I encountered this error when trying to add the footer to my layout.

undefined method `logged_in?’ for #<ActionView::Base:0x45756d0>

Just add the following lines in application.rb

include AuthenticatedSystem

If you see the error: “This application has failed to start because sqlite3.dll was not found. Re-installing the application max fix this problem.”, try moving:

• sqlite3.dll
• sqlite3.exe

to Ruby root folder

• (ex. C:\Ruby\bin)