regex - Ruby on Rails exclude group elements in route constraints -

i wondering, how define constraints regex route, match if excludes every single element of group.

for instance, so:

get "list/:action", :constraints => {:action => [none of following: (new, edit, delete, update)} 

i know if want match of elements of list, have defined so:

get "list/:action", :constraints => {:action => /(new|edit|delete|update)/}, don't know, how make work described above.

i have tried using ^ , ! signs before group, no luck far - there has notation one, think.

how exclude these elements ?

try following. it'll exclude actions route.

class excludeactions   def matches?     ["new", "edit", "delete", "update"].exclude? params[:action]   end end  "list/:id", :constraints => excludeactions.new 

this exclude new, edit, delete , update actions routes list