There is a MongoDB instance on my computer with a database. A couple of documents are present in one of the collections, I inserted them manually. There is a Scala application to manipulate the database. There is a case class called Location.
case class Location(_id: Option[ObjectId] = None, name: String) {
var visible: Boolean = false
}
This is the MongoDB configuration in the application.
private val customCodecs = fromProviders(
classOf[Location]
)
private val javaCodecs =
fromCodecs(new LocalDateTimeDateCodec(), new LocalDateDateCodec())
private val codecRegistry =
fromRegistries(customCodecs, javaCodecs,
DEFAULT_CODEC_REGISTRY)
val dbConnection = MongoClient(dbURI)
val database: MongoDatabase = dbConnection.getDatabase(dbName).withCodecRegistry(codecRegistry)
There are more classOf definitions in the customCodecs, just removed them. The dbURI string is retrieved from a config file.
There is a controller endpoint, which returns all Locations from the database. The result is this:
[{"_id":{},"name":"Hungary","visible":false},{"_id":{},"name":"Germany","visible":false},{"_id":{},"name":"France","visible":false},{"_id":{},"name":"Switzerland","visible":false},{"_id":{},"name":"Poland","visible":false}]
The documents in the database have ObjectId, since I entered them manually, and some documents should have the visibility property true. I suspect there is something wrong with the JSON serialization, but cannot figure it out what.
This is the code which queries the collection.
val query = collection.find().toFuture()
Await.result(query, 10.seconds).toList
The service method calls this code and passes the result to the controller.
import org.json4s.native.Serialization.write
val languages = enrollmentService.getAllLanguages
logger.info("GET all languages")
Ok(Json.parse(write[List[Language]](languages)))
I use json4s for JSON serialization / deserialization.
What could be the issue here?
Perhaps you need to include org.json4s.mongo.ObjectIdSerializer?