Refactored Auctions index

app/models/models.scala

@@ -1,6 +1,6 @@
 package models
 
-import play.api.libs.json.{JsValue, Json, Writes}
+import play.api.libs.json.{JsString, JsValue, Json, OWrites, Writes}
 
 import java.time.Instant
 
@@ -24,6 +24,8 @@ enum AuctionStatus(val value: Short) {
 
 object AuctionStatus {
   lazy val byValue: Map[Short, AuctionStatus] = Map.from(AuctionStatus.values.map{it => (it.value, it)})
+
+  implicit val writes: Writes[AuctionStatus] = (o: AuctionStatus) => JsString(o.toString)
 }
 
 case class Auction(id: Option[Int], name: String, status: AuctionStatus, gid: String, authorId: Int,
@@ -32,14 +34,5 @@ case class Auction(id: Option[Int], name: String, status: AuctionStatus, gid: St
                    createdAt: Instant)
 
 object Auction {
-  implicit val writes: Writes[Auction] = (a: Auction) => Json.obj(
-    "id" -> a.id,
-    "name" -> a.name,
-    "gid" -> a.gid,
-    "status" -> a.status.toString,
-    "starting_price" -> a.startingPrice,
-    "current_bid" -> a.currentBid,
-    "current_bidder_id" -> a.currentBidderId,
-    "current_bid_at" -> a.currentBidAt
-  )
+  implicit val writes: OWrites[Auction] = Json.writes[Auction]
 }