Form helper and select_tag

rubyonrails-talk
1

I can generage select-tag easily and it works fine:

<%= select_tag "category", options_from_collection_for_select(@categories, "id", "name"), :multiple => true, :include_blank => true %>

But how can I make "selected" some values?

@selected_categories = Array[1, 3]

So id 1 and 3 should be: <option selected="selected">

How can I do it?

2

Start by reading the documentation for options_from_collection_for_select

Fred