simple_form: specify id of text field
===

I've got the simple simple_form below. I'm trying to make the ID of the input field be 'my-id', but the solution below doesn't work (the id is 'comment_body'). How can I specify the id for that input field?

    = simple_form_for(@comment) do |f|
	    = f.input :body, as: :string, html: {id: "my-id"}
	    = f.button :submit

I've also tried


	    = f.input :body, as: :string, id: "my-id"

to no avail.