I have a GoodsReturn model with many ReturnedItem. For the new view, I
create a new GoodsReturn with many new ReturnedItems from a sale (and
I want to have a Add/Selected checkbox with which the user can pick
the items he wants to return. I know I could use a 'selected' virtual
attribute but I don't want to pollute my model just for this. In fact,
there is something that does exactly the opposite that I want,
<%= i_f.check_box :_destroy %>
I would like exactly the opposite, :_select.
Anybody has figured this out before?