Play中的嵌套表格！ Scala 2.2 [英] Nested form in Play! Scala 2.2

问题描述

我已经阅读了几次文档，但是在Play中的嵌套表单仍然有问题！ Scala 2.2(进一步详细说明).

I have read several times the documentation but I still have problems with my nested form in Play! Scala 2.2 (detailed further).

这是我的表格:

<form method="post" action="/admin/test2">
    first name : <input type="text" name="firstname"> <br>
    info 0 : <input type="text" name="label[0]"> <br>
    info 1 : <input type="text" name="label[1]"> <br>
    <input type="submit" value="test nested form" />
</form>

和相应的案例类:

case class Contact(firstname: String,
               informations: Seq[ContactInformation])

case class ContactInformation(label: String)


 val contactForm: Form[Contact] = Form(
    mapping(
      "firstname" -> nonEmptyText,
      "informations" -> seq(
        mapping(
          "label" -> nonEmptyText
        )(ContactInformation.apply)(ContactInformation.unapply)
      )
    )(Contact.apply)(Contact.unapply)
  )

  def saveContact = Action { implicit request =>
    contactForm.bindFromRequest.fold(
      formWithErrors => Ok("error"),
      contact => {
        println(contact)
        Ok("Done")
      }
    )
  }

我没有收到任何错误，但是我从表单(用println(contact)打印)上获得的联系人的信息字段为空，即，它看起来像这样:Contact(h,List())

I don't get any errors, but the contact that I get from the form (printed with println(contact)) has an empty informations field, i.e. it looks like this : Contact(h,List())

该错误可能来自html部分，因为我已仔细阅读了此页面上的文档:播放！ Scala表单文档 但我不知道.

The error comes probably from the html part since I have followed to the letter the documentation from this page : play! scala forms documentation but I can’t figure it out.

推荐答案

input的字段名称应使用Form中的完整路径. label出现在informations Mapping中，并且informations是序列，而不是label，因此您应该使用informations[0].label而不是label[0].

The field names of the inputs should use the full path in the Form. label appears within the informations Mapping, and informations is the sequence, not the label, so you should use informations[0].label instead of label[0].

您的视图应如下所示:

first name : <input type="text" name="firstname"> <br>
info 0 : <input type="text" name="informations[0].label"> <br>
info 1 : <input type="text" name="informations[1].label"> <br>

这篇关于Play中的嵌套表格！ Scala 2.2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！