Collection_select and API docs questions



I’m wondering where in the docs am I suppose to find a complete list of
options for the collection_select helper?

For instance the API docs have an example for the select helper as

select(“post”, “person_id”, Person.find_all.collect {|p| [, ] }, { :include_blank => true })

Where the heck do I find valid values for the options and html options?
(ie. :include_blank ) No where on the page is there a description of
what the options or html options is for and what values I can use.
Seems rather deficient in it’s it’s completeness.

Any help would be appreciated.