Convert Casbah findOne to Map

Question

 val db = mongoClient("test") 
 val coll = db("test")
 val q  = MongoDBObject("id" -> 100) 
 val result= coll.findOne(q)

How can I convert result to a map of key --> value pairs?

Bask.ws · Accepted Answer · 2013-09-03T20:34:01.047

1

result of findOne is an Option[Map[String, AnyRef]] because MongoDBObject is a Map. A Map is already a collection of pairs. To print them, simply:

for {
   r <- result
   (key,value) <- r
}
yield println(key + " " + value.toString)

or

result.map(_.map({case (k,v) => println(k + " " + v)}))

To serialize mongo result, try com.mongodb.util.JSON.serialize, like

com.mongodb.util.JSON.serialize(result.get)

edited Sep 03 '13 at 20:34

answered Sep 03 '13 at 18:03

Bask.ws

So I stored `k -> v` into a mutable Map. If I have `currency-> [ { "id" : 1.0} , { "id" : 2.0}]`, how would I get `List(1.0, 2.0)` – Kevin Meredith Sep 03 '13 at 18:41
If you want to get values of key "id" from a collection of maps, it should be: `result.flatMap(_.get("id"))` – Bask.ws Sep 03 '13 at 18:53
Try `com.mongodb.util.JSON.serialize` – Bask.ws Sep 03 '13 at 20:26

1 Answers1