任务是创建一个具有漂亮错误处理的注册表单 我是Yesod的新手,所以我发现这样做的唯一方法是:
regForm :: Form User
getRegRExtra extraFormWidget = do
(formWidget, enctype) <- case extraFormWidget of
Nothing -> generateFormPost regForm
Just val -> return val
defaultLayout $ $(widgetFile "reg/reg")
getRegR = getRegRExtra Nothing
postRegR = do
((result, widget), enctype) <- runFormPostNoToken regForm
case result of
FormSuccess person -> undefined
_ -> getRegRExtra (Just (widget, enctype))
但是有一个问题:每次提交时页面都会刷新,而我希望它动态地执行此操作
我知道它可以在Ajax或Jquery的帮助下修复,
但是,在使用Yesod POST功能时,我将失去所有的好处
有没有标准的方法来解决这个问题?
答案 0 :(得分:0)
解决方案是:
-- Used for returning plain html as AJAX response.
noLayout :: Widget -> Handler Html
noLayout widget = do
pc <- widgetToPageContent widget
withUrlRenderer [hamlet| ^{pageBody pc} |]
-- Replace a default event handler with the AJAX one.
getRegR :: Handler Html
getRegR = do
((res, formWidget), enctype) <- runFormPost regForm
defaultLayout $ do
$(widgetFile "reg/reg")
addScriptRemote "https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"
toWidget [julius|
$(document).on('click', '.btn-important', function(e) {
e.preventDefault();
e.stopPropagation();
$.ajax({
type: 'POST',
url:'@{RegR}',
cache: false,
dataType: 'html',
data:$('#form-reg').serialize(),
success: function(data) { $('#form-reg').html(data); }
});
}); |]
postRegR :: Handler Html
postRegR = do
((result, widget), enctype) <- runFormPostNoToken regForm
noLayout widget