Can I use option_groups_from_collection_for_select with include_blank on rails?

Question

I want use on my rails helper a script as follow:

select_tag(:article_id, option_groups_from_collection_for_select( @article, :categories, :name, :id, :name, :include_blank => "Select one category"))

but in my script, nothing happens. How can I use option_groups_from_colletion_for_select with include_blank method?

Answer 1

include_blank是select helper的一个选项，所以你几乎就在那里：

select_tag(:article_id, option_groups_from_collection_for_select( @article, :categories, :name, :id, :name), {:include_blank => "Select one category"})