👀 Views: 28 💬 Answers: 1 📅 Created: 2025-08-27

scala playframework json Scala

I'm integrating two systems and I'm experimenting with I'm not sure how to approach I'm experiencing unexpected behavior when trying to serialize a custom data type to JSON using the Play Framework's built-in JSON support in Scala 2.13. I have the following case class defined: ```scala case class User(name: String, age: Int) ``` I also have an implicit format for the `User` class defined in my companion object: ```scala import play.api.libs.json._ object User { implicit val userFormat: OFormat[User] = Json.format[User] } ``` When I try to serialize an instance of `User`, as shown below: ```scala val user = User("Alice", 25) val json = Json.toJson(user) println(json) ``` I expect the output to be a JSON object like this: ```json {"name":"Alice","age":25} ``` However, instead, I'm getting an behavior: ``` want to find Json serializer for User ``` I double-checked that the `User` object is properly imported in the scope where I'm using it, and I've ensured that there are no conflicting implicit conversions. I've also tried defining the format in the main application object instead of the companion object, but the scenario continues. Is there something specific to the way Play Framework handles implicits that I might be missing? Any suggestions on how to resolve this serialization scenario would be greatly appreciated. This is part of a larger web app I'm building. Any ideas what could be causing this? This is part of a larger mobile app I'm building. Any help would be greatly appreciated! This is part of a larger web app I'm building. Is there a simpler solution I'm overlooking? Any ideas how to fix this?