如何检索 Elasticsearch 的序列化字段名称 Nest.Field

Question

我想获取使用 Infer.Field<MyDocument>(doc => doc.StringField1) 创建的字段的字段名称。

示例代码：

using System;
using Nest;
using Xunit;

namespace Elasticsearch.Tests
{
    public class MyDocument
    {
        public string StringField1 { get; set; }
    }

    public class SerializeField
    {

        [Fact]
        public void TestFieldName()
        {
            var connectionSettings = new ConnectionSettings(new Uri("http://myesdomain.com:9200"));
            var client = new ElasticClient(connectionSettings);

            var stringField = Infer.Field<MyDocument>(doc => doc.StringField1);
            // TODO: Code to get then name of stringField when serialized
        }
    }
}

我可以离开客户端以便像在任何请求中那样序列化 stringField 的名称吗？

Answer 1

幸运的是我自己找到了答案：

短：

client.SourceSerializer.Serialize(stringField, ms);

完成：

using System;
using System.IO;
using System.Text;
using Nest;
using Xunit;

namespace Elasticsearch.Tests
{
    public class MyDocument
    {
        public string StringField1 { get; set; }
    }

    public class SerializeField
    {

        [Fact]
        public void TestFieldName()
        {
            var connectionSettings = new ConnectionSettings(new Uri("http://myesdomain.com:9200"));
            var client = new ElasticClient(connectionSettings);

            var stringField = Infer.Field<MyDocument>(doc => doc.StringField1);
            string fieldName;
            using (var ms = new MemoryStream())
            {
                client.SourceSerializer.Serialize(stringField, ms);
                ms.Position = 0;
                using (var reader = new StreamReader(ms, Encoding.UTF8))
                {
                    fieldName = reader.ReadToEnd();
                }
            }
            Assert.Equal("\"stringField1\"", fieldName);
        }
    }
}

Answer 2

有一个更好的解决方案，使用 Nest.FieldResolver。

using System;
using Nest;
using Xunit;

namespace Elasticsearch.Tests
{
    public class MyDocument
    {
        public string StringField1 { get; set; }
    }

    public class TestClass
    {

        [Fact]
        public void TestFieldName()
        {
            var connectionSettings = new ConnectionSettings(new Uri("http://myesdomain.com:9200"));
            var fieldResolver = new FieldResolver(connectionSettings);
            var stringField = Infer.Field<MyDocument>(doc => doc.StringField1);
            var fieldName = fieldResolver.Resolve(stringField);

            Assert.Equal("stringField1", fieldName);
        }
    }
}

如何检索 Elasticsearch 的序列化字段名称 Nest.Field

How to retrieve the serialized field name of an Elasticsearch Nest.Field

elasticsearch

nest