播放：如何验证 JSON 中的电子邮件列表

Question

鉴于以下 JSON...

{
  "recipients" : [
    "user1@domain1.com", "user2@domain2.com"
  ],
  "subject" : "My subject",
  "body" : "My body"
}

...我需要验证收件人列表...下面是我的代码：

import play.api.libs.json._
import play.api.libs.functional.syntax._
import play.api.libs.json.Reads._

val js = Json.parse("""{"subject":"My subject","body":"My body", "recipients":["user1@domain1.com","user2@domain2.com"]}""")

val validateRecipients = verifyingIf((arr: JsArray) =>
  arr.value.nonEmpty)(Reads.email)
val recipients: Reads[JsArray] = {
  (__ \ 'recipients).json.pick[JsArray] andThen validateRecipients
} 

val validateNotification = (
  ((__ \ 'recipients).json.copyFrom(recipients)) ~
  ((__ \ 'subject).json.pickBranch) ~
  ((__ \ 'body).json.pickBranch)
).reduce 

validateNotification.reads(js).fold(
  valid = { validated => JsSuccess(validated) },
  invalid = { errors => JsError(errors) }
)

问题是我的验证器不工作：

res1: Product with Serializable with play.api.libs.json.JsResult[play.api.libs.json.JsObject] = JsError(List((/recipients,List(ValidationError(error.expected.jsstring,WrappedArray())))))

我是不是漏掉了什么？

Answer 1

尝试像这样更改您的代码：

val validateRecipients = verifyingIf((arr: JsArray) =>   arr.value.nonEmpty)(Reads.list(Reads.email))

播放：如何验证 JSON 中的电子邮件列表

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