first of all: i don't know if using POST with a redirect is possible.
but other than that: i don't think you really need that.
on the one hand you could just leave that
if request.post?
out and everything is fine. i don't think you really need to check for
POST in logout. the user is not submitting any data.
on the other hand (if you want to stick to that POST thing) you could
add something like this:
if request.post? or params[:redirect]
now in your redirection just add
, :params => {:redirect => true}
i think the difference is that form a view there can be a real POST
(with user submitting data, pressing a button, ...), but a controller
just GETs infos and stuff. i'm no expert, so that is just a guess.
normally you POST things that create or destroy things. in other words
actions that make a difference. "logout" is somewhere in between. it
doesn't really do anything harmful or constructive, but it changes the
state of your user. so in my opinion, logout could as well be a POST
as a GET method. in my last project i didn't check for POST in my
logout-action. btw: authlogic doesn't do that either in their example.