Hi Michael. I want to make authorization in Yesod application build on ACL principle. We have in Yesod "*Routes*". *"Route"* is resource. I have the list : *Resource | Access* ---------------------------------- RouteA | Allow RouteB | Deny I would like to : 1. save, read this list outward yesod 2. check, that the concrete route satisfy or not satisfy the list 3. have more flexible way to define *resource pattern* in list. For example i have *RouteX String Int. *I wish to define pattern * "RouteX * 666"* * * If i had this, i would to implement *Yesod.isAuthorized* method similar *isAuthorized _ = do* * acl <- getACL* * route <- getCurrentRoute* * case check acl route of* * True -> return Authorized* * **False -> return Unauthorized* * * * * I do not know, may be there is the way to make this now. How i can put it into practice ? Thanks. -- Best regards, Cheshkov Anton Phone: +7 909 005 18 82 Skype: cheshkov_anton