Sorting mixed integer/string field

gistfile1.txt

curl -XDELETE 'http://localhost:9200/test-idx'
echo
curl -XPUT 'http://localhost:9200/test-idx' -d '
{
  "mappings": {
    "doc": {
      "properties" : {
        "mixed" : {"type": "string", "store": "yes"}
      }
    }
  }
}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/1' -d '{"mixed": "1"}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/2' -d '{"mixed": "2"}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/3' -d '{"mixed": "3"}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/4' -d '{"mixed": "10"}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/5' -d '{"mixed": "12"}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/6' -d '{"mixed": "test"}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/7' -d '{"mixed": "foo"}'
echo
curl -XPUT 'http://localhost:9200/test-idx/doc/8' -d '{"mixed": "bar"}'
echo
curl -XPOST 'http://localhost:9200/test-idx/_refresh'
echo
echo
curl -XGET 'http://localhost:9200/test-idx/doc/_search?pretty=true' -d '
{
  "query" : {
      "match_all": {}
  },
  "sort": {
      "_script":{
          "script" : "s = doc['\''mixed'\''].value; n = org.elasticsearch.common.primitives.Ints.tryParse(s); if (n != null) { String.format(\"%010d\",n)} else { s }",
          "type" : "string"
      }
  }
}'
echo

@imotov
Can you provide a NEST example please

@imotov
Can you provide a NEST example please