In Rails, how to handle multiple checked checkboxes, just split on the , or?

Question

Curious what the \'rails way\' of handling the situation when a user checks multiple checkboxes (with the same name value), and it gets posted back to the controller.

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Answer 1

In addition to Chuck Callebs answer, I realised that with sending an empty string instead of nil or false as unchecked value, Rails will understand to remove associated ids on an update action:

<%= f.check_box :tag_ids, {multiple: true}, tag.id, '' %>