A quick ground up kit for Ruby on Rails

Guys, I am relatively very new to Ruby almost a veteran as an
automation engineer. Lately we have been using some open source tools
which my current employer mandated to use and we started.

Now in the middle of the project, we have hit various technical issues
which no one is aware of. Going deep into the tool revealed that it
was a subset of Ruby on Rails. Is there any short/crisp to the point
dummies series etc which I could go through for a quicker turn around

I've burnt my hands in almost all the scripting languages except Ruby,
and any help on this will be highly highly appreciated.

Abhinav Vaid