[英]Scala Play: How to map JSON array structure to Case Class
I'm completely new to Scala and Play and i stumbled upon the following the problem:我对 Scala 和 Play 完全陌生,我偶然发现了以下问题:
Given the following JSON structure:给定以下 JSON 结构:
[
{
"name": "Adam",
"age": 19
},
{
"name": "Berta",
"age": 22
},
...
]
I would like to map this JSON to a case classes like this:我想将此 JSON 映射到这样的案例类:
case class User(name: String, age: Int)
case class Users(users: Seq[User])
or at least something like Seq[User]
.或至少像Seq[User]
类的东西。
I don't know how to traverse the JsPath because there is no key.不知道怎么遍历JsPath,因为没有key。
I tried to define an implicit read but either he cannot resolve the symbol "read" or he cannot found an implicit for user.我试图定义一个隐式读取,但要么他无法解析符号“读取”,要么他找不到用户的隐式。
object User {
implicit val reads: Reads[User] = Json.reads[User]
}
object Users {
implicit val usersReads: Reads[Users] = (
(JsPath).read[Seq[User]]
)(Users.apply _)
}
How can I map my JSON to a working model?如何将我的 JSON 映射到工作模型?
Something like this will work像这样的东西会起作用
import play.api.libs.json._
case class User(name: String, age: Int)
case class Users(users: Seq[User])
object User {
implicit val reads = Json.reads[User]
}
object Users {
implicit val reads: Reads[Users] = Reads {
_.validate[Seq[User]].map(Users(_))
}
}
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