multi-select category listbox

rubyonrails-talk
1

Hi, on to the final bit of my blogging engine and would really appreciate a pointer in the right direction.

With each article they can be associated with multiple categories, so inside the admin panel I need to somehow have a listbox that allows users to select multiple categories and associated them to an article.

Now I can return an object of all the categories available and one that contains all the categories the current article is associated, putting that in a listbox and making it save the results is what stumps me.

any ideas?

2

select_tag “article[category_ids]“, options_from_collection_for_select(@available_categories, “id”, “name”), :multiple=>true

That should create a select box with multiple selected elements...