A Collection that provides default methods using a SerializationPack.

Some methods of this collection accept instances of Reader[T] and Writer[T], that transform any T instance into a document, compatible with the selected serialization pack, and vice-versa.

A builder that helps to make a fine-tuned query to MongoDB.

When the query is ready, you can call cursor to get a Cursor, or one if you want to retrieve just one document.

import scala.concurrent.{ ExecutionContext, Future }

import reactivemongo.api.bson.BSONDocument
import reactivemongo.api.bson.collection.BSONCollection

def firstFirst(coll: BSONCollection)(
  implicit ec: ExecutionContext): Future[Option[BSONDocument]] = {
  val queryBuilder = coll.find(BSONDocument.empty)
  queryBuilder.one[BSONDocument]
}