I have said it before. Rails is awesome. I find myself creating a new web application in Rails rather than, say, ASP.NET or even PHP much more often. It is intuitive and uncomplicated. Command-line tools and pre-handpicked components allow me to focus more on writing code and implementing business logic.
While working on a Rails application, I was faced with a (reasonably) common situation — having one layout for the end-users and another for administrators. I had my admin pages all written and finished. My CSS framework of choice at the time I started was Ink, mostly because of its fresh UX and Bootstrap‘s aging grid system. When I was about to start with end-user pages, I found out about the release of Bootstrap v4.0.0 (something I had been waiting for since long). The examples made using this version were very much in line with what I wanted for my own purpose. I had made a decision: use Bootstrap for end-user pages and stick to Ink for the admin interface. Realizing this decision in Rails was not as easy as I had thought.
As good as the Rails documentation is, I frequently find myself wanting for more code snippets and examples for things that are apparently presumed to be too basic to explain. After stackoverflowing into the problem and applying some common sense, I came up with the following solution.