我有以下处理程序/模板组合:
处理程序/ automation.hs
data AutomationRequest = AutomationRequest {
arEnabled :: Bool
, arTemplate :: Text
, arSchedules :: Textarea
}
getAutomationR :: Handler Html
getAutomationR = do
(formWidget, formEnctype) <- generateFormPost form
defaultLayout $(widgetFile "automation")
form :: Form AutomationRequest
form extra = do
(enabledRes, enabledView) <- mreq checkBoxField "" Nothing
(templateRes, templateView) <- mreq textField (withPlaceholder "..." $ bfs (""::Text)) Nothing
(schedulesRes, schedulesView) <- mreq textareaField (withPlaceholder "..." $ bfs (""::Text)) Nothing
(_, submitView) <- mbootstrapSubmit $ BootstrapSubmit ("Save"::Text) ("btn-primary"::Text) []
let requestRes = AutomationRequest <$> enabledRes <*> templateRes <*> schedulesRes
widget = $(widgetFile "automation-form")
return (requestRes, widget)
模板/ automation.hamlet
<form method=post role=form action=@{AutomationR} enctype=#{formEnctype}>
^{formWidget}
模板/自动化form.hamlet
#{extra}
<div .panel .panel-default>
<div .panel-heading>^{fvInput enabledView} ...
<div .panel-body>
^{fvInput templateView}
^{fvInput schedulesView}
^{fvInput submitView}
这可以按预期工作,但我想要其他功能:
a)我希望能够嵌套数据结构,如:
data AutomationRequestCollection = AutomationRequestCollection {
arcItemAbc :: AutomationRequest
, arcItemDef :: AutomationRequest
... -- 10 Items
}
data AutomationRequest = AutomationRequest {
arEnabled :: Bool
, arTemplate :: Text
, arSchedules :: Textarea
}
我不知道如何将嵌套应用到let requestRes = AutomationRequest <$> enabledRes <*> templateRes <*> schedulesRes
b)重复使用itemAbc,itemDef,...:
的HTML面板-- loop somehow
<div .panel .panel-default>
<div .panel-heading>^{fvInput enabledView} ...
<div .panel-body>
^{fvInput templateView}
^{fvInput schedulesView}
任何可以推动我走向正确方向的想法?
答案 0 :(得分:1)
我不确定(b),但(a)应该是直截了当的申请组成,例如:
Foo <$> (Bar <$> baz <*> bin) <*> qux
也可以更容易看出是否将其分解为多个功能:
bar = Bar <$> baz <*> bin
foo = Foo <$> bar <*> qux