Access to nested json fields

[mauriziocosmai]

Hi, I've created a new WMS service using a mongodb data store. Below you can see the layer preview and an extract of the mongodb json schema.

I used the plugin in order to create a new layer in geoserver, but it seems that it cannot parse all the json fields.
In particular the field "external" which is a nested array is not present in the list of my layers.

Regards
Maurizio

...
  "description": "FLUMENDOSA D",
  "geometry": {
    "type": "Point",
    "coordinates": [
      9.53485566216458,
      39.9593062203704
    ]
  },
  "external": [
    {
      "k": "building_type_id",
      "t": "int",
      "vs": null,
      "vb": null,
      "vi": 9,
      "vf": null,
      "vt": null
    },
....    
  ]
}```