Elastic Search NEST Self referencing loop detected for property

Question

Using version 2.0.2 I just cannot find where to set the serializer settings for the Nest.JsonNetSerializer to avoid Self referencing loop detected exception.

And i guess that the documentation is not updated for version 2.

You might have a look at my answer on **[“Self Referencing Loop Detected” exception with JSON.Net](https://stackoverflow.com/questions/40472419/self-referencing-loop-detected-exception-with-json-net/51235783#51235783)** page. — Murat Yıldız, Jul 08 '18 at 20:40

score 4 · Accepted Answer · edited Aug 14 '18 at 23:27

There is one PR in the NEST repo explaining how you can handle this situation in version 2.x.x.

Summary:

var connectionPool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));
var settings = new ConnectionSettings(connectionPool, connectionSettings => new MyJsonNetSerializer(connectionSettings))
    .DefaultIndex(indexName)
    .DisableDirectStreaming()
    .PrettyJson();

public class MyJsonNetSerializer : JsonNetSerializer
{
    public MyJsonNetSerializer(IConnectionSettingsValues settings) : base(settings)
    {
    }

    protected override void ModifyJsonSerializerSettings(Newtonsoft.Json.JsonSerializerSettings settings)
    {
        settings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
    }
}

Hope it helps.

Thank you, that was exactly what i needed – pmertz Feb 18 '16 at 10:11 — pmertz, Feb 18 '16 at 10:11
Thanks! Updating NEST has been a load of fun – gnudle Jul 13 '16 at 17:47 — gnudle, Jul 13 '16 at 17:47

score 0 · Answer 2 · edited Aug 14 '18 at 23:27

Once again there are some significant changes to how this is handled in v.5.

I found this example in the tests and it worked for me...

        /**=== Overriding Json.NET settings
    *
    * Overriding the default Json.NET behaviour in NEST is an expert behavior but if you need to get to the nitty gritty, this can be really useful.
    */

    /**
     * The easiest way is to create an instance of `SerializerFactory` that allows you to register a modification callback
     * in the constructor
     */
    public void EasyWay()
    {
        var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));
        var connectionSettings = new ConnectionSettings(
            pool,
            new HttpConnection(),
            new SerializerFactory((jsonSettings, nestSettings) => jsonSettings.PreserveReferencesHandling = PreserveReferencesHandling.All));

        var client = new ElasticClient(connectionSettings);
    }

https://github.com/elastic/elasticsearch-net/blob/5.x/src/Tests/ClientConcepts/LowLevel/Connecting.doc.cs#L289

Elastic Search NEST Self referencing loop detected for property

2 Answers2