Is there a reason why collection_radio_buttons doesn’t have an option for “include_blank” like collection_select does? I’ve found where there is an “include_hidden” option, but what if I want the user to have the option of not selecting any option from my collection I have passed? Or want them to have the ability to change the associated record to nil in my form?
I’ve never contributed to Rails so I was thinking perhaps I’ll make an attempt with adding this option, but wasn’t sure if there was a reason for it not being there in the first place.
It could be because the native form element doesn’t have any way to “unselect” an option once chosen.
You can choose a different option within the same-name element group, and you’d have to create that option as a deliberate blank value input. So if you added another option to the elements, it would need to be <input type="radio" id="foo_bar_" value="" name="foo[bar]"> <label for="foo_bar_">None</label>.
Since Rails introspects the options available within the collection, and this is an entirely made-up option, it would have to create that option from the parameters given to the helper. So maybe the thing to do would be to map this to allow_blank: 'None' or something like that.
Another way to get this going would be to manually insert the null option at the beginning or end of the collection you pass to collection_radio_buttons, maybe something like collection_radio_buttons(:color, Array(Color.new(name: 'None')) + Color.all.to_a, :name, :id).
