Question

我正在尝试在使用liftweb 2.4 scala网络框架构建的应用中显示验证消息该应用程序只有一个文本框和提交按钮，以将文本添加到数据库。提交时，代码段代码会检查文本框是否为空并显示消息。

 package snippet {

object Notes {

  def noteForm(in: NodeSeq): NodeSeq = {
    def add() = {
      if (note.description.isEmpty()) {
        S.error("descError", "Please enter a note")
      } else {
        note.save
        NotesServer ! "refresh"
        S.notice("descMessage", "Note added.")
      }

    }
    bind("f", in,
      "desc" -%> SHtml.text(note.description.is, note.description(_)),
      "submit" -%> SHtml.submit("Note It !", add)) ++ SHtml.hidden(add _)
  }

  def delete(note: Note): JsCmd = {
    note.delete_!
    NotesServer ! "refresh"
    S.notice("descMessage", "Note deleted.")
  }

}

object note extends RequestVar[Note]({ Note.create })

}

html是

 <lift:surround with="default" at="content">
<div class="row">
    <div class="span11">
        <form class="lift:form.ajax">
            <lift:Notes.noteForm>
                <f:desc id="desc" placeholder="what do you want to note?"
                    class="xxlarge" />
                <f:submit class="btn primary" />
            </lift:Notes.noteForm>
        </form>
    </div>
</div>

<div class="row">
    <div class="span11">
        <lift:msg id="descError" errorClass="alert-message error" />
        <lift:msg id="descMessage" noticeClass="alert-message success" />
    </div>
</div>

    <div class="lift:comet?type=NotesComet" id="notes">
        <div class="row show-grid">
            <div class="note span10 lpad20">
                <div style="display: inline" class="desclist"></div>
                <a class="close rpad10 tpad10" href="javascript://">&times;</a>
            </div>
        </div>
    </div>

彗星的代码

object NotesServer extends LiftActor with ListenerManager {

def createUpdate =  Note.allNotes


override def lowPriority = _ match{
  case "refresh" => updateListeners()
}

}  
class NotesComet extends CometActor with CometListener {
 private var notes: List[Note] = List()

 def registerWith = NotesServer

 override def lowPriority = {
  case n: List[Note] => notes = n; reRender()
 }

def render = "#notes" #> {
  (notes.reverse.map(note => ".desclist *" #> note.description &
  ".close [onclick]" #> ajaxInvoke(() => Notes.delete(note))))
}

}

消息显示仅首次与淡入和淡出完美匹配，但随后失败。

这是Boot.scala中淡入和淡出的内容

LiftRules.noticesEffects.default.set((notice: Box[NoticeType.Value], id: String) => {
  Full(JqJsCmds.FadeOut(id, 2 seconds, 2 seconds))
})

以下提升标签

<lift:msg id="descError" errorClass="alert-message error" />

生成

<span id="descError" ></span>

并在提交后，上面的html更改为以下内容。淡入淡出效果非常好

<span id="descError" style="display: none;">
<span id="descError">
    <span class="alert-message error">Please enter a note</span>
</span>
</span>

对于后续提交事件，不会显示该消息，因为有两个具有相同ID descError的span标记

现在问题很明显，但不知道如何解决这个问题。

更新

我用liftweb 2.5-M3尝试了相同的代码，我注意到的差异是提交后生成的html如下。

<span id="descError" style="display: none;">
    <span class="alert-message error">Please enter a note</span>
</span>

但仍未显示后续提交的消息。

liftweb通知/消息/警告第二次不起作用

0 个答案: