attribute: defaultvalue = string | number

{
  "DataBaseTables": {
     "TableName": {
        "interface": {
           "fields": { },
           "views": { 
                "default": { 
                   "fields" : [
                      {"field": "date_created","order": "desc", "display_cfo": true,"fa":"eye", "api":"/cfo/helloteca_users","id_field": "id"}
                  ]
                 }
            }
         }
     }
  }
}

Assign the value to a string o number if the current value is empty