How can I get a List(String)
from this MongoDBList
?
val a: MongoDBList = ... // equal to [ { "id" : "0001"} , { "id" : "0017"}]
Desired result: List("0001", "0017")
I would prefer:
val bld = MongoDBList.newBuilder
bld += MongoDBObject("id" -> "0001")
bld += MongoDBObject("id" -> "0017")
val a = bld.result
a.map(x=> x.asInstanceOf[DBObject].getAs[String]("id").get)
// or to avoid nonexitence emelents
a.flatMap(x=> x.asInstanceOf[DBObject].getAs[String]("id"))
I don't like asInstanceOf here if you have
{ "data" : [ { "id" : "0001"} , { "id" : "0017"}] }
casbash can serialize Seq for you
val a2 = MongoDBObject( "data" -> a )
a2.getAs[Seq[DBObject]]("aa").get.map { x => x.getAs[String]("id").get}
MongoDBList extends scala.collection.mutable.LinearSeq so you should be able to to use toList