Error when updating a vertex

[kyeljmd]

Here is the error that I am encountering.

play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[IllegalStateException: Property addition is not supported]] at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:251) at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:178) at play.core.server.AkkaHttpServer$$anonfun$1.applyOrElse(AkkaHttpServer.scala:363) at play.core.server.AkkaHttpServer$$anonfun$1.applyOrElse(AkkaHttpServer.scala:361) at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:413) at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60) at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55) at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:91) at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12) Caused by: java.lang.IllegalStateException: Property addition is not supported at org.apache.tinkerpop.gremlin.structure.Element$Exceptions.propertyAdditionNotSupported(Element.java:133) at org.apache.tinkerpop.gremlin.structure.util.detached.DetachedVertex.property(DetachedVertex.java:91) at org.apache.tinkerpop.gremlin.structure.util.detached.DetachedVertex.property(DetachedVertex.java:50) at gremlin.scala.ScalaElement.$anonfun$updateWith$2(ScalaElement.scala:76) at scala.collection.immutable.HashMap$HashMap1.foreach(HashMap.scala:231) at scala.collection.immutable.HashMap$HashTrieMap.foreach(HashMap.scala:462) at gremlin.scala.ScalaElement.updateWith(ScalaElement.scala:76) at gremlin.scala.ScalaElement.updateWith$(ScalaElement.scala:70) at gremlin.scala.ScalaVertex.updateWith(ScalaVertex.scala:8) at gremlin.scala.ScalaElement.updateAs(ScalaElement.scala:82)

Here are my models and the way I have defined it.

import java.util. UUID
import gremlin.scala.{Element, Marshallable, Vertex, id, label, underlying}


@label("trip")
case class TripModel(tripId: Option[String] = None,
                     name: String,
                     createdDate: java.time.Instant = java.time.Instant.now(),
                     startDate: java.time.Instant,
                     duration: Int,
                     totalAdults: Int,
                     totalChildrens: Int,
                     @underlying vertex: Option[Vertex] = None
                    )

object TripModel {

  implicit val marshaller = new Marshallable[TripModel] {
    def toCC(element: Element): TripModel = {
      val tripId = Some(element.value[UUID]("tripId").toString)
      val tripName = element.value[String]("name")
      val duration =  element.value[Int]("duration")
      val totalAdults = element.value[Short]("totalAdults")
      val totalChildren =element.value[Short]("totalChildrens")
      val date = element.value[java.time.Instant]("createdDate")
      val startDate = element.value[java.time.Instant]("startDate")

      models.TripModel(tripId = tripId, name = tripName,
        startDate  = startDate, duration = duration,
        totalAdults = totalAdults, totalChildrens = totalChildren, createdDate = date)
    }

    override def fromCC(cc: TripModel): FromCC = {
      val values = Map("name" -> cc.name,
        "createdDate" -> cc.createdDate,
        "startDate" -> cc.startDate,
        "duration"-> cc.duration,
        "totalAdults" -> cc.totalAdults,
        "totalChildrens" -> cc.totalChildrens,
        "tripId" -> UUID.fromString(cc.tripId.get).toString)
      FromCC(None, "trip", values)
    }
  }
}

And here is how I update a certain field.

  def updateTripDetails(id:String, tripUpdate: UpdateTripRequest) = {
    implicit val g = db.g

    val item = db.g.V().has(KeyValue(tripId, id)).head
    item.updateAs[TripModel](cc => cc.copy(name = tripUpdate.tripName.getOrElse(cc.name)))
  }

What I am trying to do is to update a certain vertex property, however I always received the aforementioned error. is there any workaround for this?

[kyeljmd]

bumping this