I'm very comfortable using CakePHP. I've built many apps using knockout.js on top of it, extensively used jQuery and AJAX throughout and have used both MySQL and MongoDB to drive the data.
For someone like me who is confident in their abilities of another MVC framework, how much of a learning curve is involved transitioning over to ROR (or any other MVC for that matter)? Has anyone switched from say Django, CakePHP or MVC4 over to Rails, or vice versa?