I\'ve litte problem with radiobuttons in SimpleForm.
When i use
= f.association :manufactureType, :collection => ManufactureType.all, :as => :
My example was slightly more complicated, none of the other answers worked for me since there was no collection or model to reference.
= f.input :attending, as: :radio_buttons, :collection => [ ['Yes', true], ['No', false] ], :checked => ['Yes', true]