Problem using :default => {:format => 'pdf'} in Rails 3

I want to route requests something like this: reports/bloodtypes is routed to controller reports, action bloodtypes, with format = pdf, and the route named as bloodtype_report. The Guides gives an example

match 'photos/:id' => 'photos#show', :defaults => { :format => 'jpg' }

When I do this:

match 'reports/bloodtypes' => 'reports#bloodtypes', :defaults => {:format => 'pdf'}, :as => 'bloodtype_report'

or this

match 'reports/bloodtypes' => 'reports#bloodtypes', :format => 'pdf', :as => 'bloodtype_report'

the controller still does not receive the :format => 'pdf' in params, and tries to render the report as HTML. The funny thing is that the route is shown by Rake as

 bloodtype_report :  /reports/bloodtypes(.:format) : {:format=>"pdf", :controller=>"reports", :action=>"bloodtypes"}

whether I use the firs开发者_开发技巧t form (with :default) or second (just setting the format to pdf). It seems the route is correct, so why is the format parameter not being passed to the controller?

---

have you tried adding this to your controller:

respond_to do |format|
  format.html
  format.pdf { render :pdf => "show" }
end