Inspiration from a concept by ajdunlap: http://hackage.haskell.org/package/yesod-paginate

But uses an entirely different approach.

There are two pagination functions. One for arbitrary items where you provide the list of things to be paginated:

 getSomeRoute = do
     things' <- getAllThings

     (things, widget) <- paginate 10 things'

     defaultLayout $ do
         [whamlet|
             $forall thing <- things
                 ^{showThing thing}

             <div .pagination>
                  ^{widget}
             |]

And another for paginating directly out of the database, you provide the same filters as you would to selectList.

 getSomeRoute something = do
     -- note: things is [Entity val] just like selectList returns
     (things, widget) <- runDB $ selectPaginated 10 [SomeThing ==. something] []

     defaultLayout $ do
         [whamlet|
             $forall thing <- things
                 ^{showThing $ entityVal thing}

             <div .pagination>
                  ^{widget}
             |]

Both functions return a tuple: the first element being the list of items (or Entities) to display on this page and the second being a widget showing the pagination navagation links.