[chef] Attributes merged between roles and environments?

[Douglas Garstang < >]

This seems to be the case, but I thought I'd check, just in case I'm making incorrect assumptions...

Do multi level attributes get 'merged' between environments and roles? Ie, would this environment attribute:

{
  "name": "qa",
  "default_attributes": {
    "mongodb": {
        "cluster_name": "test1"
    }
}

and this role attribute:

{
    "name": "role-mongo-shard1",
    "default_attributes": {
        "mongodb": {
            "shard_name": "shard1",
            "config": {
                "replSet": "replset1"
           }
        }
    }
}

be merged into this json?

mongodb": {
  "cluster_name": "test1",
  "shard_name": "shard1",
  "config": {
    "replSet": "replset1"
  }
}

Or, does one wipe the other?

Thanks,
Doug.