forms - 如何从错误案例中提取隐藏字段

Question

我正在使用带有 Scala 的 Play 2.0，我想提取一些存储在隐藏字段中的值。

控制器中的表格：

    val recommendationForm: Form[Recommendation] = Form(
        mapping(
          "fromMail" -> email,
          "fromName" -> nonEmptyText(5, 30),
          "toMail" -> email,
          "toName" -> nonEmptyText(5, 30),
          "message" -> optional(text(0, 300)),
          "productGroupId" -> nonEmptyText(),
          "masterProductId" -> nonEmptyText()
        )
        (Recommendation.apply)(Recommendation.unapply)
      )

def doRecommend = xyzAction {  implicit request =>
    recommendationForm.bindFromRequest.fold(
      errors => {
        errors.data.map(x => println(x))
        BadRequest("")
      },
      {
        case (recommendation) => {
        Ok("")
        }
      }
    )
  }

推荐案例类：

case class Recommendation(fromMail: String, fromName: String, toMail: String, toName: String, message: Option[String], productGroupId: String, masterProductId: String)

的HTML：

    @form(action = routes.Product.doRecommend) {

              <input type="hidden" value="@{(productGroup \ "@id").text}" />
              <input type="hidden" value="@{(currentMasterProduct \ "@id").text}" />

    @inputText(field = recommendationForm("fromName"),
                        '_label -> "",
                        'placeholder -> Messages("recommendation.from.name"),
                        '_showConstraints -> false,
                        'class -> "text ui-widget-content ui-corner-all"
                        )

some more fields...
}

生成的隐藏字段 HTML：

<input type="hidden" value="74.75.652">

但我无法从错误中提取这两个隐藏字段。它只打印其他五个。如何提取隐藏的？

Answer 1

我所要做的就是给输入字段一个名称属性......

<input type="hidden" value="@{(productGroup \ "@id").text}" name="@recommendationForm("productGroupId").name" />