Question

我试图在我收到的json中读取内部对象。我需要按原样获取这个内部对象并将其插入Mongo。

{
  "order" : {
    "customer" : {
      "name" : "Custy McCustomer",
      "contactDetails" : {
        "address" : "1 Fake Street, London, England",
        "phone" : "0123-456-789"
      }
    },
    "items" : [
      {
        "id" : 123,
        "description" : "banana",
        "quantity" : 1
      },
      {
        "id" : 456,
        "description" : "apple",
        "quantity" : 2
      }
    ],
    "total" : 123.45
  }
}

Answer 1

根据原始示例，您将推出Decoder。我不是一个专家，我昨天第一次使用它，但我认为downField应该有效。

case class Item(id: String, description: String, quantity: Int)
case class InnerObject(items: List[Item])

object InnerObject {
  implicit val decode: Decoder[InnerObject] = Decoder.instance(c =>
    c.downField("items").as[InnerObject]
  )
}

用Circe读内部对象

1 个答案: