mongodb update document method - mongodb

Question

I would like to create an generic update method, that take as input the Object _id and a String (Json) that correspond to the update to do.
I need to transform the inputDocument variable to a Document type to be passed in the update method
I need to have this generic way of typing because i would like to use this method on any field of the collection,
How can i achieve this ?
def updateField(_id : String, inputDocument : String): Future[UpdateResult] = {
/* inputDocument = {"key" : value}*/
val mongoClient = MongoClient("mongodb://localhost:27017")
val database: MongoDatabase = mongoClient.getDatabase("databaseName")
val collection: MongoCollection[Document] = database.getCollection("collectionName")
val updateDocument = Document("$set" -> inputDocument)
collection
.updateOne(Filters.eq("_id", BsonObjectId(_id)), updateDocument)
.toFuture()
}

Answer 1

My thinking about handling the inputDocument variable was not correct.
It is indeed necessary to transform the input into Document.
org.mongodb.scala.bson.collection.mutable.Document has an apply() method to parse a json string to a Document.
Thank you all for your comments.
def updateField(_id : String, inputDocument : String): Future[UpdateResult] = {
/* inputDocument = {"key" : value}*/
val mongoClient = MongoClient("mongodb://localhost:27017")
val database: MongoDatabase = mongoClient.getDatabase("databaseName")
val collection: MongoCollection[Document] = database.getCollection("collectionName")
val updateDocument = Document("$set" -> Document(inputDocument))
collection
.updateOne(Filters.eq("_id", BsonObjectId(_id)), updateDocument)
.toFuture()
}