Question

我在Stack中构建了我的网站，实际上我正在尝试添加更多页面（另一个问题是另一天），所以今天我打开了代码并且：

[13 of 14] Compiling Handler.Vendita  ( src/Handler/Vendita.hs, .stack-work/dist/x86_64-freebsd/Cabal-2.0.1.0/build/Handler/Vendita.o )

/usr/home/giulio/Lavori/karmen/src/Handler/Vendita.hs:20:4: error:
    * Couldn't match type `WidgetT site0 m0' with `HandlerT App IO'
      Expected type: HandlerT App IO Html
        Actual type: WidgetT site0 m0 ()
    * In a stmt of a 'do' block:
        (asWidgetT GHC.Base.. toWidget)
          ((blaze-markup-0.8.2.0:Text.Blaze.Internal.preEscapedText
              GHC.Base.. Data.Text.pack)
             "<main><h1>Canonical</h1>
</main>
")
      In a stmt of a 'do' block:
        (do (asWidgetT GHC.Base.. toWidget)
              ((blaze-markup-0.8.2.0:Text.Blaze.Internal.preEscapedText
                  GHC.Base.. Data.Text.pack)
                 "<main><h1>Canonical</h1>
</main>
"))
      In the expression:
        do setTitle "Vendita"
           (do (asWidgetT GHC.Base.. toWidget)
                 ((blaze-markup-0.8.2.0:Text.Blaze.Internal.preEscapedText
                     GHC.Base.. Data.Text.pack)
                    "<main><h1>Canonical</h1>
 </main>
 "))
   |
20 |  $(widgetFile "vendita")
   |    ^^^^^^^^^^^^^^^^^^^^

--  While building custom Setup.hs for package karmen-0.0.0 using:
      /usr/home/giulio/.stack/setup-exe-cache/x86_64-freebsd/Cabal-simple_mPHDZzAJ_2.0.1.0_ghc-8.2.2 --builddir=.stack-work/dist/x86_64-freebsd/Cabal-2.0.1.0 build lib:karmen --ghc-options " -ddump-hi -ddump-to-file"

代码正常删除所有页面，并将窗口小部件文件从此更改为主页窗口小部件无法解决问题。复制getHomeR代码也会导致错误。我还尝试添加和删除isAuthenticated部分以导致不同的错误。

Yesod - 无法匹配`WidgetT site0 m0'与`HandlerT App IO'

0 个答案: