This is one solution to issue #623. I'm not to happy about monkey patching Rails though, are there better solutions?
This patch will not be needed when SimpleForm is used with Rails >= 4.0 thanks to this: rails/rails@9035324.
Allow procs for label and value methods in grouped collection selects.
Use old hash syntax for Ruby 1.8 support.
No. This is the best current solution.
Thank you so much and sorry for the delay.
CHANGELOG for #690
Awesome, thanks! 😃