方法映射的参数太多：(应用：(字符串，模型。地址) => R)(取消应用： R => 选项[(字符串，模型。Address)])play.api.data.Mapping[R]

Question

我有两个这样的case类。

case class Company(name: String, address: Address)
case class Address(address1: String, address2: String, 
                   city: String, state: String, 
                   zip:String, country: String)

在我的应用程序。我定义了以下代码。

[1]. val companyForm = Form(of(Company.apply _, Company.unapply _)(
    "name" -> text,
    "address" -> mapping(
        "address1" -> nonEmptyText,
        "address2" -> text,
        "city" -> nonEmptyText,
        "state" -> nonEmptyText,
        "zip" -> nonEmptyText,
        "country" -> nonEmptyText
    )(Address.apply)(Address.unapply)
  )
)
[2]. val companyForm = Form(mapping(
    "name" -> text,
    "address" -> mapping(
        "address1" -> nonEmptyText,
        "address2" -> text,
        "city" -> nonEmptyText,
        "state" -> nonEmptyText,
        "zip" -> nonEmptyText,
        "country" -> nonEmptyText
    )(Address.apply)(Address.unapply)
  )(Company.apply, Company.unapply)
)

现在[1]为我工作，但当我试图将其转换为[2]时，它给了我以下错误:

方法映射参数太多:(apply: (String, models.Address) => R)(unapply: R => Option[(String, models.Address)])play.api.data.Mapping[R].

请告诉我哪里做错了。

Answer 1

由于methode of()是贬义的，您的表单必须看起来像这样:

     val companyForm = Form(
    mapping(
    "name" -> text,
    "address" -> mapping(
      "address1" -> nonEmptyText,
      "address2" -> text,
      "city" -> nonEmptyText,
      "state" -> nonEmptyText,
      "zip" -> nonEmptyText,
      "country" -> nonEmptyText
    )(Address.apply)(Address.unapply)
  )(Company.apply)(Company.unapply)
  )

所以你的问题是在下面的语法Company.Apply and Company.unapply方法