为属性检测到 Elastic Search NEST 自引用循环

Question

使用版本 2.0.2 我只是找不到在哪里设置 Nest.JsonNetSerializer 的序列化程序设置以避免自引用循环检测到异常。

而且我猜文档没有针对版本 2 进行更新。

Answer 1

NEST 存储库中有一个 PR 解释了如何在版本 2.x.x 中处理这种情况。

总结：

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;
    }
}

希望对您有所帮助。

Answer 2

v.5 中的处理方式再次发生了一些重大变化。

我在测试中找到了这个例子，它对我有用...

        /**=== 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

为 属性 检测到 Elastic Search NEST 自引用循环

Elastic Search NEST Self referencing loop detected for property

nest

为属性检测到 Elastic Search NEST 自引用循环