Rails Documentation of hash options

Rails Documentation of hash options
Is it just me or is the current rails documentation severely lacking when it comes to documenting all the various hash options can be sent to many rails methods. Things like html_options, session_options, etc. Is there an easier way to figure out the available options, other than reading the rails source. If so I’m all ears. If not I am not just complaining I’ll roll up my sleeves and help document them if pointed in the right direction.

–Tim