On Mon, Sep 10, 2012 at 9:56 AM, Michael Snoyman <michael@snoyman.com> wrote:

On Sun, Sep 9, 2012 at 5:48 PM, Arthur Clemens <arthurclemens@gmail.com> wrote:

You'll need the AdminR constructor: AdminR AdminRootR.

It doesn't work in the scaffolded site, whereas it works as expected in a single file site like https://github.com/yesodweb/yesod/wiki/Hierarchical-routes-and-breadcrumbs

I created a new scaffolded site, used add-handler to create Handler/Admin.hs, and changed the route in config/routes to

/admin AdminR:

/ AdminRootR GET

yesod devel results in Application.hs:27:1: Not in scope: data constructor `AdminRootR'

changing that to

/admin AdminRootR GET

runs without errors.

Just to confirm: does your `cabal` file state Yesod version 1.0 or 1.1?

Actually, I bet I know what the problem is: the export list in Foundation.hs doesn't include the AdminR datatype. Try adding:

AdminR (..)

If you use
-ddump-splices when compiling, GHC will spit out the generated
code/data types, which should give a good idea of what's going on
under the surface.

I can't, it results in

Import.hs:10:2: lexical error at character 'i'

Using ghc -cpp -ddump-splices main.hs

results in Model.hs:13:1: Parse error: naked expression at top level

Arthur

Sorry, I should have clarified: you can do something like:

cabal configure --ghc-option=-ddump-splices

Then `cabal build` will pass in that option. You get the "naked expression" error because TemplateHaskell isn't enabled.

Michael