SELECT within SELECT

rubyonrails-talk
1

I am trying to create a drop down of categories and that same drop down should also have subcategories of currently selected category.

for category drop down I use something like

<%= collection_select(:category, :id, Category.find(:all), :id, :name) %>

but I would like to do something like

<%= collection_select(:category, :id, Category.find(:all).each do |cat| if cat.name?(currently_selected) Subcategory.find(:cat.name), :id, :name) %>

any ideas?.

2

I think the closest you can come to this with real HTML would be using `option_groups_from_collection_for_select`; subcategories will be selectable but not categories.

And that's just the way 'optgroup' works, nothing to do with Rails.

HTH!