ruby on rails - Hide a Collection_Select Option -


i have dropdown built option_groups_from_collection_for_select(category.all, :subcategories, :name, :id, :name). how can hide 1 of categories appears?

instead of category.all, can pass in

category.where("id not in (?)", [1, 2, 3])

that exclude categories ids 1, 2 , 3.


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