使用List中的JsArray创建JSObject [Long]

Question

我需要使用List [Long]中的JsArray创建一个JsObject。我虽然有一些名为- for each possible query param - get its value from the request - if value is present build predicate which - gets field value from detail object and convert to string - check that both strings (queried and extracted) matches - if value is not present return predicate that always returns true - combine resulting predicates using and - use always true as fallback (which here never actually happens)

的东西

JsLong

显然没有。有什么建议我可以创建吗？

Answer 1

JavaScript / JSON中只有一种数字类型，Number。看起来你正在使用Play-JSON，它有JsNumber，可以用BigDecimal构建。 （只需将Long转换为BigDecimal）。

import play.api.libs.json._

def someWork(someList: List[Long]): JsObject = {
  Json.obj(
    "someField" -> JsArray(someList.map(a => JsNumber.apply(BigDecimal(a))))
  )
}

scala> someWork(List(1, 2, 3, 4))
res0: play.api.libs.json.JsObject = {"someField":[1,2,3,4]}