Scala Play Framework Json Serializer error

Question

Trying to convert class to Json. Here is my class, it includes other two classes:

case class GoodEdit(good: Good, data: List[(String, Option[GoodText])])
case class Good(
  id: Long,
  partnumber: Option[String] = None
)
case class GoodText(
  goodid: Long,
  languageid: Long,
  title: String,
  description: Option[String] = None)

And here are my writers:

object GoodWriters {
  implicit val goodWrites = new Writes[Good] {
    def writes(good: Good) = Json.obj(
      "id" -> good.id,
      "partnumber" -> good.partnumber
    )
  }

  implicit val goodTextWrites = new Writes[GoodText] {
    def writes(goodText: GoodText) = Json.obj(
      "goodid" -> goodText.goodid,
      "languageid" -> goodText.languageid,
      "title" -> goodText.title,
      "description" -> goodText.description
    )
  }

  implicit val GoodEditWrites = new Writes[GoodEdit] {
    def writes(goodEdit: GoodEdit) = Json.obj(
      "good" -> Json.toJson(goodEdit.good),
      "data" -> Json.toJson(
        for ((lang, goodTextOpt) <- goodEdit.data ) yield Json.obj(lang -> goodTextOpt)
      )
    )
  }

Then, in controller I try it to use like this:

  Action {
    import jwriters.GoodWriters._
    GoodEditAggregate.get(id).map{
      a => Ok(Json.toJson(a))
    }.getOrElse(Ok(Json.toJson(Json.obj("status" -> "error","message" -> "Can't find good with this id"))))
  }

And compilator complaining on this part: Ok(Json.toJson(a))

No Json serializer found for type GoodEdit. Try to implement an implicit Writes or Format for this type

Can't understand what is wrong. I've imported writers for objects already

Do you have another Writes implementations imported\defined in the same context? It could be ambiguous implicits — Odomontois

Murat Mustafin Murat Mustafin · Accepted Answer · 2015-10-24T13:18:03

0

votes

Try to Import Goodwrites globally

Scala Play Framework Json Serializer error

1 Answers