如何在View中创建只读字段

Question

我有一个包含2个字段的表单 - empno和name.两者都填充默认值.在视图中显示时,我想要的empno是只读且name可编辑.

在视图创建中,我@leaveform.value.get.empno用于显示就绪并且工作正常.只有在插入错误时才会出现此问题([NoSuchElementException: None.get]).

问题:

1. 问题是返回错误没有value属性.还有什么可以用来获得价值？
2. 我可以跳过@inputText只读字段吗？

请参阅下面的代码:

// ***** CONTROLLER *****//

val leaveform = Form[LeaveModel](
      mapping(
          "empno" -> nonEmptyText,
          "name" -> nonEmptyText
      )((no, empno) => LeaveModel(empno, name))
      ((leave: LeaveModel) => Some(leave.empno, leave.name))
)

def create = withAuth { username => implicit request =>

  // Define default values
  val empno = "STUDENT"
  val name = ""

  // Set default values
  val filledForm = leaveform.fill(LeaveModel(empno,name))
  Ok(html.leave.form(filledForm))
}

def insert = Action (
    implicit request => {
        leaveform.bindFromRequest.fold(
            error => {
                BadRequest(html.leave.form(error)) // Question 1. Here is the error.
            },
            leave => {
               LeaveModel.insert(leave)
               Redirect(routes.indexController.index())
            }
        )  
      }
  )

// ***** VIEW START***** //
@(leaveform: Form[LeaveModel])
@leaveform.value.get.empno
@helper.form(
    action = (routes.LeaveController.update(oid)),
        'id -> "leaveform") {
            @inputText(leaveform("empno")) // Question 2. 
            @inputText(leaveform("name"))
        }

Answer 1

使用表单助手不是强制性的.如果使用它们,则可以readonly使用CSS 传递属性或设置字段样式,使其看起来只读.

• CSS禁用Twitter引导程序:

  @inputText(
      editForm("createdOn"), 
      'id -> "createdOn", 
      'class -> "input-xlarge disabled", 
      '_label -> Messages("createdOn"), 
      '_help -> ""
  )
  

• 传递可选属性: readonly

  @inputText(
      editForm("createdOn"), 
      'id -> "createdOn", 
      'class -> "input-xlarge", 
      '_label -> Messages("createdOn"), 
      'readonly -> "readonly", 
      '_help -> " This is read only"
  )
  

• 您也可以不重新发送该字段,但显示其值:

  <span class="date">Created on: @editForm("createdOn").value</span>
  

• 更新2018-01-24

播放字段现在返回a Optional,请参阅文档.这意味着您可以从字段中获取值,如:

• @form("fieldName").getValue.get(可以扔一个NPE)
• @form("fieldName").getValue.getOrElse("defaultValue")