Create index pattern from C# Nest

Elastic Stack Elasticsearch
1

Hello everyone.
I need to create an index pattern using C # Nest, without using kibana.
I searched the Nest API but didn't find it. Is possible create index pattern using the Nest API?

Regards,

Alder

2

Yes, it's possible to create an index template with an index pattern with Nest (high level client) or Elasticsearch.Net (low level client)

Assuming 7.x versions, with Nest

var client = new ElasticClient();

var response = client.Indices.PutTemplate("template_name", p => p
	.IndexPatterns("foo-*")
	.Map(m => m
		.DynamicTemplates(d => d
			.DynamicTemplate("strings", dt => dt
				.MatchMappingType("string")
				.Mapping(mm => mm
					.Text(t => t
						.Fields(f => f
							.Keyword(k => k
								.Name("raw")
								.IgnoreAbove(256)
							)
						)
					)
				)
			)
		)
	)
);

or using the object initializer syntax to construct a request

var request = new PutIndexTemplateRequest("template_name")
{
	IndexPatterns = new[] { "foo" },
	Mappings = new TypeMapping
	{
		DynamicTemplates = new DynamicTemplateContainer
		{
			{ "strings", new DynamicTemplate
				{
					MatchMappingType = "string",
					Mapping = new TextProperty
					{
						Fields = new Properties
						{
							{ "raw", new KeywordProperty
								{
									Name = "raw",
									IgnoreAbove = 256
								}
							}
						}
					}

				}
			}
		}
	}
};

var response = client.Indices.PutTemplate(request);

both yield the request

PUT <scheme://host:port>/_template/template_name
{
  "index_patterns": [
    "foo-*"
  ],
  "mappings": {
    "dynamic_templates": [
      {
        "strings": {
          "mapping": {
            "fields": {
              "raw": {
                "ignore_above": 256,
                "type": "keyword"
              }
            },
            "type": "text"
          },
          "match_mapping_type": "string"
        }
      }
    ]
  }
}

With the low level client

var lowLevelClient = new ElasticLowLevelClient();

var json = @"{
  ""index_patterns"": [
    ""foo-*""
  ],
  ""mappings"": {
    ""dynamic_templates"": [
      {
        ""strings"": {
          ""mapping"": {
            ""fields"": {
              ""raw"": {
                ""ignore_above"": 256,
                ""type"": ""keyword""
              }
            },
            ""type"": ""text""
          },
          ""match_mapping_type"": ""string""
        }
      }
    ]
  }
}";

var stringResponse = lowLevelClient.Indices.PutTemplateForAll<StringResponse>(
    "template_name", 
    PostData.String(json));
3

Thank you very much

4

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