The mapping and the user object

gistfile1.json

// MAPPING
curl -XGET http://localhost:9200/directorio/_mapping?pretty=true
{
  "usuario" : {
    "properties" : {
      "avatar" : {
        "type" : "string",
        "index" : "not_analyzed",
        "omit_norms" : true,
        "index_options" : "docs"
      },
      "friends" : {
        "type" : "string",
        "index" : "not_analyzed",
        "omit_norms" : true,
        "index_options" : "docs"
      },
      "friends_qty" : {
        "type" : "integer"
      },
      "iduser" : {
        "type" : "integer"
      },
      "username" : {
        "type" : "string",
        "index" : "not_analyzed",
        "omit_norms" : true,
        "index_options" : "docs"
      }
    }
  }
} 

// THE DOCUMENT
curl -XGET http://localhost:9200/directorio/usuario/320292?pretty=true
{
  "_index" : "directorio",
  "_type" : "usuario",
  "_id" : "320292",
  "_version" : 11,
  "exists" : true, 
  "_source" : {
    "iduser":"320292",
    "username":"ELDELAPAMPA",
    "avatar":"userfiles/uf214/320292/avatar",
    "friends":[
      "43",
      "51",
      "54",
      "55",
      "66",
      "69",
      "285",
      "893978",
      "1003406",
      "165",
      "165"
    ],
    "friends_qty":10
  }
}

// ADDING SCRIPT
{
"script" : "ctx._source.friends += friend; ctx._source.friends_qty = ctx._source.friends.size()",
 "params" : { "friend" : "???" }
}

// REMOVAL SCRIPT
{
"script" : "ctx._source.friends.remove('299'); ctx._source.friends_qty = ctx._source.friends.size()"
}