haskell - Using Yesod.Auth.Hardcoded SiteAdmin in a hamlet template -


problem description

i've been unable compiling example of using yesod.auth.hardcoded. problem in trying interrogate user in hamlet template. foundation.hs set per documentation in link hardcoded. handler looks this:

gethomer :: handler html gethomer =     uid <- maybeauthid     (widget, enctype) <- generateformpost . renderbootstrap3 bootstrapbasicform $ blurbform nothing     currentpost <- rundb $ selectfirst [] [desc blogid]     currentblurb <- rundb $ selectfirst [] [desc blurbid]     defaultlayout $         settitle "my site"         addscriptremote "https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"         addscriptremote "https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.2.0/js/collapse.js"         $(widgetfile "homepage")

my site compiles , renders happily until try useful uid being assigned in do block above.

what i've tried

i've tried both $maybe , $case constructs in hamlet documentation. $maybe looked this:

    $maybe user <- uid        <p>there's name     $nothing        <p>no name

this succeeded regardless of whether logged in hardcoded user.

the $case version looked this:

    $case uid         $of left _             <p>there's no name         $of right username             <p>it worked

and failed with:

exception when trying run compile-time code:   inside $case there may $of.  use '$of _' wildcard. code: widgetfile "homepage" in splice: $(widgetfile "homepage")

question(s)

am setting uid correctly in handler code and, if so, how should access hardcoded sitemanager in templates?

as posting question made me think of answer, though i'd still grateful better ones. using combination of $maybe , $case so:

    $maybe user <- uid         $case user             $of left _                 <p>there's no name             $of right username                 <p>there might name of #{username}     $nothing        <p>no name

got me correct username. please post answer if there better way.


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