Question

我有这个场景即时获取Facebook feed（facebook api）列表到json对象列表。比我想要反序列化到类对象列表。

第一个问题是，哪种数据结构将是最佳做法？（cass class，tratis or regular class）

我就是这样做的，我在帖子案例类中创建了评论列表

case class Post(id: String, fromId: String, fromName: String, message: String, fullUrl:     String, createdTime: String, updateTime: String ,List[Comment]) {   
 }
  case class Comment(id: String, fromId: String, fromName: String, message: String, creationTime: String, likeCount: Int)

然后我就像那样映射

 implicit val post = (
(__ \ "id").read[String] and
  (__ \ "from").\("id").read[String] and
  (__ \ "from").\("name").read[String]  and
  (__ \ "message").read[String]  and
  (__ \ "actions").\\("link").read[String]  and
  (__ \ "created_time").read[String]  and
  (__ \ "updated_time").read[String]
  )(Post)

第二个问题是如何映射列表？

感谢，

miki

Answer 1

在这种情况下，案例类看起来很不错。

您需要为评论定义相同的隐式阅读器，然后将读者更改为类似的帖子：

implicit val post = 2
(__ \ "id").read[String] and
  (__ \ "from").\("id").read[String] and
  (__ \ "from").\("name").read[String]  and
  (__ \ "message").read[String]  and
  (__ \ "actions").\\("link").read[String]  and
  (__ \ "created_time").read[String]  and
  (__ \ "updated_time").read[String] and
  (__ \ "comments").reads[List[Comment]]
)(Post)

Scala JsObject到嵌套类

1 个答案: