How to install gem in rails 4?

Question

How do you install plugins in Rails 4? Or more specifically, how do you install the Princely plugin for PrinceXML? I've spent a lot of time Googling but have not come up with anything. Everything seems to be for earlier versions of Rails. I get the impression that one would put in in the Gem file somehow? If someone could clarify this for me, I'd be most appreciative.

Answer 1

Gemfile

gem 'princely', '~> 1.4.1'  

or if you prefer to point to github

gem 'princely', github: 'mbleigh/princely'

then run bundle install

Answer 2

Go to into your gemfile, do what Antarr Byrd said. Basically put in those lines above or below and of the lines about gems already there. Running bundle install will result in a new Gemfile.lock, at which point it'll start working.