How to convert a sequence of Tuples into JSON array in spray

Question

I have an array of student IDs which is dynamic in scala.

val studentIds = Seq(1,2,3,4....)

I should convert them into a JSON array in Spray JSON.

like

[
 {"student_id" : 1 },
 {"student_id" : 2 },
 {"student_id" : 3 },
]

How to do it without a case class?

jgoday · Accepted Answer · 2019-03-21 18:16:16Z

3

You can use Maps. Each map will be translated directly to an json object.

import spray.json._
import DefaultJsonProtocol._

val studentIds = Seq(1,2,3,4).map(s => Map("student_id" -> s))

println(studentIds.toJson)

answered Mar 21, 2019 at 17:55

jgoday

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Comments

sachin teotia · Accepted Answer · 2022-11-17 10:38:10Z

0

You can use the below code snippet-

import spray.json.{JsNumber, JsObject}
val studentIds = Seq(1,2,3,4).map{x => JsObject("student_id" -> JsNumber(x))}
  
println(studentIds)

answered Nov 17, 2022 at 10:38

sachin teotia

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