如何动态生成 selectFields
我正在尝试通过使用 flip 映射 mreq selectField 来动态生成 selectFields，我想知道这是否是最好的方法。
这是我的尝试。在研究了 Flip 的类型之后，我开始认为这可能是错误的方法。欢迎反馈。
[(versionRes,versionView)] <- mapM (mreq (flip (selectField "Placeholder" Nothing)))
versions
versions 的类型为 [[(Text,Text)]]。
我认为这些错误没有说明任何有用的信息，因为如果通过这种方法可以做到这一点，那么问题就在于如何获得正确的类型。我很难做到这一点，并且不确定这种方法是否有解决方案。
供参考的是 mreq, 翻转 和 selectField。
嗯，这是我的下一次尝试。
[(versionRes,versionView)] <- mapM (flip mreq selectField ("Placeholder" Nothing)) versions
我正在尝试让 mreq 像这样工作
mreq "Placeholder" Nothing (选择字段 [(文本),(文本)])
I'm trying to dynamically generate selectFields by mapping over mreq selectField using flip, and I'm wondering if this is the best way.
This is my attempt. After studying flip's type I'm starting to think this may be the wrong approach. Feedback welcome.
[(versionRes,versionView)] <- mapM (mreq (flip (selectField "Placeholder" Nothing)))
versions
versions's type is [[(Text,Text)]].
I don't think the errors say anything useful as, if this is possible with this approach, it's a matter of getting the types right. I'm having difficulty doing that, and am not sure there's a solution with this approach.
For reference here are the type definitions of mreq, flip and selectField.
Well, this is my next attempt.
[(versionRes,versionView)] <- mapM (flip mreq selectField ("Placeholder" Nothing)) versions
I'm trying to get mreq to work like this
mreq "Placeholder" Nothing (selectField [(Text),(Text)])
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我得出的结论是，翻转是不切实际的，即使它可能是可行的。
我正在做这样的事情。
versionInfo <- mapMgenerateVersionSelectFields [[(Text),(Text)]]generateVersionSelectFields version = domreq (selectField version) "Placeholder" Nothing
我将其留在这里，以便可能会得到改进或出现替代方法。
I have come to the conclusion that flip just isn't practical, even if it might be possible.
I'm doing something like this instead.
versionInfo <- mapM generateVersionSelectFields [[(Text),(Text)]]generateVersionSelectFields version = domreq (selectField version) "Placeholder" Nothing
I leave this here so that maybe it gets improved or an alternative approach appears.