[web-devel] [Yesod] Abstracting permissions with Yesod

[Michael Snoyman]

On Sun, Sep 9, 2012 at 5:48 PM, Arthur Clemens <arthurclemens at 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?


>  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
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