Recipie-Book/app/models/Food.scala

package models

import org.bson.types.ObjectId

case class Food (
  _id: String = "",
  val name: String,
  val glutenFree: Boolean = false,
  val vegitarian: Boolean = false,
  val vegan: Boolean = false,
  val nutrients: Map[String, Float],
  val source: String,
  val category: Seq[String],
  val primaryMeasure: Measure,
  val density: Float,
  val mass_p_u: Float,
  val price: Int,
  val alternatives: Seq[String] = Nil
    //val picture: Image
)

object Food {
  import play.api.libs.json._

  private def roundJsValue(jsval: JsValue, perc: Int): JsValue = {
    jsval match {
      case JsNumber(num) => JsNumber(num.setScale(perc, BigDecimal.RoundingMode.HALF_UP))
      case JsArray(seq) => JsArray(seq.map(roundJsValue(_, perc)))
      case JsObject(map) => JsObject(map.mapValues(roundJsValue(_, perc)))
      case _ => jsval
    }
  }

  implicit val foodFormats = Format[Food](
    Json.using[Json.WithDefaultValues].reads[Food],
    Json.using[Json.WithDefaultValues].writes[Food].transform(roundJsValue(_, 2))
  )
}