radiofieldList のラベルとして html をレンダリングしようとすると、次のエラーが発生しました。
Handler/Manager.hs:91:32:
No instance for (RenderMessage Scheduler (Handler RepHtml))
arising from a use of `radioFieldList'
Possible fix:
add an instance declaration for
(RenderMessage Scheduler (Handler RepHtml))
In the first argument of `mreq', namely `(radioFieldList bPairs)'
In a stmt of a 'do' block:
(jobRes, jobView) <- mreq
(radioFieldList bPairs) "Scheduled Jobs" Nothing
In the expression:
do { let bPairs = buttonPairs kjPairs
statusPairs
= map (pack . show &&& id) $ ([minBound .. maxBound] :: [Status ]);
(jobRes, jobView) <- mreq
(radioFieldList bPairs) "Scheduled Jobs" Nothing;
(noteRes, noteView) <- mreq textareaField " Notes " Nothing;
(statusRes, statusView) <- mreq
(selectFieldList statusPairs) " Status " Nothing;
.... }
したがって、以下のコードを考えると、インスタンスを作成するのは理にかなっていますか?(RenderMessage Scheduler (Handler RepHtml))
statusForm :: RForm CapturedData
statusForm kjPairs extra = do
let bPairs = buttonPairs kjPairs
statusPairs = map (pack . show &&& id) $
([minBound .. maxBound] :: [Status])
(jobRes ,jobView) <- mreq (radioFieldList bPairs) "Scheduled Jobs" Nothing
(noteRes, noteView) <- mreq textareaField " Notes " Nothing
(statusRes, statusView) <- mreq (selectFieldList statusPairs) " Status " Nothing -- as of 0.9.4.x it is just best to explicitly type widgetFile
let widget = toWidget ($(widgetFile "status") :: Widget)
return (CapturedData <$> jobRes <*> statusRes <*> noteRes
, widget)
buttonPairs :: [KeyJobPair] -> [(Handler RepHtml,KeyJobPair)]
buttonPairs kjList = sort $ map buttonPairs' kjList
where buttonPairs' :: KeyJobPair -> (Handler RepHtml,KeyJobPair)
buttonPairs' (KeyJobPair ((Key key), JobData (Firmware product)
(Version version)
(StartDate sDate)
status)) =
let (Right jid) = fromPersistValue key :: Either Text Int64
in (hamletToRepHtml [hamlet|<a href=@{RootR}(" Job Id " ++ (show jid))>|]
,KeyJobPair (Key key, JobData (Firmware product)
(Version version)
(StartDate sDate)
status))
(HTML,a)
思いついたのですが、本当の答えは、必要な要求ではなく、受け入れるカスタム フィールドを作成することです(msg,a)
radioFieldList
。インスタンスを作成するだけでうまくいくことを願っていますRenderMessage
。