validation - Play 验证 - 具有特定字段错误的自定义表单字段验证

Question

case class Address(
  address1: String,
  city: String,
  state: String,
  postal: String,
  country: String
)

Form(
    mapping = mapping(
      "address1" -> nonEmptyText,
      "city" -> nonEmptyText,
      "state" -> nonEmptyText,
      "postal" -> nonEmptyText,
      "country" -> nonEmptyText
    )(Address.apply)(Address.unapply).verifying("Invalid Postal Code!", validatePostal _)
)

def validatePostal(address: Address): Boolean = {
    address.country match {
      case "US" | "CA" =>
        val regex: Regex = ("^(\\d{5}-\\d{4}|\\d{5}|\\d{9})$|^([a-zA-Z]\\d[a-zA-Z]( )?\\d[a-zA-Z]\\d)$").r
        regex.pattern.matcher(address.postal).matches()
      case _ => false
    }
}    

上述邮政编码表单验证工作正常，对于无效的美国或加拿大邮政编码，表单上显示全局错误。

我希望将错误显示为字段旁边的字段错误，而不是显示为全局错误，在我的情况下，全局错误显示在表单顶部。

有没有办法使用内置的表单约束或验证方法来实现此目的，而不是 FormError 的？

Answer 1

您可以将约束添加到该字段。然后更新 validatePostal 以接受两个值的元组。

Form(
  mapping = mapping(
    "address1" -> nonEmptyText,
    "city" -> nonEmptyText,
    "state" -> nonEmptyText,
    "postal" -> tuple(
      "code" -> nonEmptyText,
      "country" -> nonEmptyText
    ).verifying("Invalid Postal Code!", validatePostal _),
  )((address1, city, state, postal) => Address(address1, city, state, postal._1, postal._2))((address: Address) => Some((address.address1, address.city, address.state, (address.postal, address.country))))
)

模板:

@inputText(
  addressForm("postal.code"), 
  '_label -> "Postal code",
  '_help -> "Please enter a valid postal code.",
  '_error -> addressForm.error("postal")
)