I am using Sunspot to search for events (parties, concerts, ...) in a Ruby on Rails 3 application.
I have managed to set up free text s
You can do in this way:
with(:registration_date).between(params[:start_date].to_date..params[:end_date].to_date)
Look here: http://sunspot.github.io/docs/Sunspot.html#search-class_method