Casbah Scala MongoDB Driver - Embedded Objects

Question

I know that objects in MongoDB can contain several levels of data (just JSON objects can). However, the Casbah driver tutorial only covers creating “flat” objects with only one data layer. How can I create and work with multi-level objects using Casbah?

Answer 1

Its quite intuitive.

Construction:

val a: MongoDBOBject = DBObject("a" -> DBObject("b" -> "c")) // results in { "a" : { "b" : "c"}} 

access to internal fields with dotted notation :

 val c = a.expand[String]("ab") 

search for the internal object as a DBObject, so you can perform the same operations with it as with the parent object:

 val b = a.as[DBObject]("a")