Hey there. Love the gem. I'm new to Rails (and OO programming in general) so I can easily get hung up on a small detail that a pro wouldn't. I was stuck for several hours on a project simply because I didn't add the block variable to the simple_fields_for method. This is because in your documentation on line 458, your example doesn't have the block variable added either. I had to scour the interwebs for the solution. I stumbled across the solution and ss soon as I added that variable, BOOM!..everything worked to perfection. Anyway, maybe this will help...maybe it won't and I'm just off my rocker. But thanks for a great gem and thanks for taking the time to read this.
…associated to the class
…ustom input classes