doesn't work
> t.find(

)
> t.find()
{"_id" : ObjectId( "4a61b6711591f41f0f1bc5ff") , "name" : "test" , "anotherdoc" : {"somenum" : 1 , "something" : "somenewval"}}
{"_id" : ObjectId( "4a68cd809fc5017126fdd57f") , "a" : [

]}