JsonNet serializer not used for script params

[sloncho]

NEST/Elasticsearch.Net version: 6.6.0

Elasticsearch version: n/a

Description of the problem including expected versus actual behavior:

Script parameters are not serialized using the externally provided serializer (JsonNet). If elastic client is configured to use StringEnum serializer, this is not applied to objects passed as script update parameters.

Using SourceConverter instead?

[russcam]

Thanks for opening @sloncho.

Not sure what we should do here; thoughts @Mpdreamz, @codebrain ?

[Alukim]

@russcam @Mpdreamz @codebrain

We have the same problem with NodaMoney converter.

Are you planning a fix or you have some another solution ?

[russcam]

We haven't discussed this yet @Alukim.

For string enum values, enums can be attributed with [StringEnum] to serialize as strings

private static void Main()
{
    var defaultIndex = "example";
    var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));

    var settings = new ConnectionSettings(pool, JsonNetSerializer.Default)
        .DefaultIndex(defaultIndex)
	.DefaultTypeName("_doc");

    var client = new ElasticClient(settings);

	var indexResponse = client.Update<Document>(1, u => u
		.Script(s => s
			.Source("ctx._source.foo = params.foo")
			.Params(p => p
				.Add("foo", Foo.Bar)			
			)
		)
	);
}

public class Document 
{
	public Foo Foo { get;set; }
}

[StringEnum]
public enum Foo
{
	Bar,
	Baz
}

which emits

POST http://localhost:9200/example/_doc/1/_update?pretty=true 
{
  "script": {
    "params": {
      "foo": "Bar"
    },
    "source": "ctx._source.foo = params.foo"
  }
}

[codebrain]

@Alukim - does the suggested solution help?

[codebrain]

Closing as no response has been received, a solution has been offered by @russcam above.