Re: [web-devel] on the necessity of extractBody

Firstly, polymorphic Hamlet is going the way of the do-do. (Sorry everyone, the train ride worked out differently than expected, so the blog post explaining this isn't ready yet.) So going forward these things should be less of a problem. I think the reason you're running into trouble is the use of "addHamlet"; try replacing it with "addWidget" and see what happens. On Tue, May 3, 2011 at 4:33 PM, Max Cantor wrote:

I've heard that its unnecessary, but I can't seem to get out it of my code.  for instance, here is a simple route which should return a small HTML snippet for AJAX requests:

 getAdmPurchDetailRh   :: EncPurchId -> Handler RepHtml  getAdmPurchDetailRh epid = withEncPersistKey epid $ \(purchId, purch) -> do    -- purchImgData <- runDB $ selectList [] [] 50 offset    -- _TODO this will be done FOR EACH Purchase.  need to cache the OcrRefs    ocrRefs <- map snd <$> runDB ( selectList [] [] 50 0)    mPsiPkv <- runDB (getBy $ PurchImgUnq purchId True)    (_, formW, et, nonce) <- runFormPost (purchFormlet purch ocrRefs)    let act = AdminRb    pc <- widgetToPageContent $ do      form <- extractBody formW      addHamlet $(Settings.hamletFile "admin/purch-dtl")    hamletToRepHtml [$hamlet|\^{pageBody pc}|]

and the hamlet file:

<div>  $maybe psiPkv <- mPsiPkv      $nothing          missing image  <form action=@{act} enctype=#{et}>    #{nonce}    ^{form}    <input type=submit>

if I drop the extractBody formW call and replace ^{form} with ^{formW} it fails to compile.

also, is there a way to get rid of the widgetToPageContent call and then extracting it with pageBody pc?  hamletToRepHtml fails when the hamlet references any widgets it seems.

sidenote, i understand that there is alot of polymorphism going on here but I'm still not exactly clear on what i "should" be doing in terms of hamlet, widgets, snippets etc.  any style hints are appreciated.

max

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