Question

我们正在从Elasticsearch 5.2升级到Elasticsearch 6.4.2，因此也从Nest 5.0.1升级到Nest 6.4.2。在5.0.1中，我们可以将geoJSON数据作为对象建立索引，但是Nest 6.4.2会生成一个包含geoJSON且没有数据的请求。

我们将具有geoJSON格式的地理数据的字段索引到Elasticsearch中的geoshape字段，如下所示：

在GeoDocument类中：

[Nest.Text(Name = "field1")]
public string Field1 { get; set; }
[Nest.GeoShape(Name = "geometrie")]
public object Geometrie { get; set; }

数据：

string polygon = "{\"type\":\"Polygon\",\"coordinates\":[[[5.856956,51.002753],[5.856928,51.002771],[5.856687,51.002853],[5.856956,51.002753]]]}";

将数据序列化为对象：

Geometrie = JsonConvert.DeserializeObject<object>(polygon);

Nest 5.0.1中的索引文档（工作正常）：

var response = this.ElasticClient.Index<T>(geoDocument);

Nest 6.4.2中的索引文档：

var response = this.ElasticClient.IndexDocument<T>(geoDocument);

请求应类似于：

{"field1":"correct content","geometrie":{"type":"Polygon","coordinates"::[[[5.856956,51.002753],[5.856928,51.002771],[5.856687,51.002853],[5.856956,51.002753]]]}}

但是Nest会生成如下请求：

{"field1":"correct content","geometrie":{"type":[],"coordinates":[[[[],[]],[[],[]],[[],[]],[[],[]]]]}}

响应：

{"error":{"root_cause":[{"type":"mapper_parsing_exception","reason":"failed to parse field [geometrie] of type [geo_shape]"}],"type":"mapper_parsing_exception","reason":"failed to parse field [geometrie] of type [geo_shape]","caused_by":{"type":"illegal_state_exception","reason":"Can't get text on a START_ARRAY at 1:673"}},"status":400}

我们不在连接设置中注入SourceSerializerFactory。

Answer 1

它确实是一个Json.NET JObject。在没有SourceSerializerFactory的情况下创建的ConnectionSettings。将JsonNetSerializer.Default设置为SourceSerializerFactory可以解决此问题，谢谢！

using System;
using Nest;
using Nest.JsonNetSerializer;
using Newtonsoft.Json;

namespace TestIndexing
{
  class Program
  {
    static void Main(string[] args)
    {
      var indexName = "geodocument";
      var connectionPool = new Elasticsearch.Net.SniffingConnectionPool(new Uri[] { new Uri("http://localhost:9200") });
      var connectionSettings = new Nest.ConnectionSettings(connectionPool);
      connectionSettings.DefaultIndex(indexName);
      connectionSettings.DisableDirectStreaming();

      var elasticClient = new ElasticClient(connectionSettings);

      Func<TypeMappingDescriptor<GeoDocument>, ITypeMapping> typeMapping = m => m
        .Dynamic(false)
        .Properties(ps => ps
          .Keyword(k => k
            .Name(n => n.DocId))
          .GeoShape(g => g
            .PointsOnly(false)
            .Name(o => o.GeoField)));

      elasticClient.CreateIndex(new CreateIndexDescriptor(indexName).Mappings(ms => ms.Map(typeMapping)));

      var polygon = "{\"type\":\"Polygon\",\"coordinates\":[[[5.856956,51.002753],[5.856928,51.002771],[5.856687,51.002853],[5.856956,51.002753]]]}";
      var document = new GeoDocument()
      {
        DocId = "1",
        GeoField = JsonConvert.DeserializeObject<object>(polygon),
      };

      var indexResponse = elasticClient.IndexDocument(document);

      Console.WriteLine(indexResponse.DebugInformation);

      elasticClient.DeleteIndex(new DeleteIndexRequest(indexName));
      Console.ReadKey();
    }

    [Nest.ElasticsearchType(Name = "geoDocument", IdProperty = "DocId")]
    public class GeoDocument
    {
      [Nest.Keyword(Name = "DocId")]
      public string DocId { get; set; }

      [Nest.GeoShape(Name = "GeoField")]
      public object GeoField { get; set; }
    }
  }
}

将geojson作为对象索引到geoshape中，可以在Nest 5.0.1中使用，但不能在Nest 6.4.2中使用吗？

1 个答案: