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This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.

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Elastic Docs ›Elasticsearch.Net and NEST: the .NET clients [1.x] ›Aggregations

Missing aggregation

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Missing aggregation

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A field data based single bucket aggregation, that creates a bucket of all documents in the current document set context that are missing a field value (effectively, missing a field or having the configured NULL value set).

Fluent DSL

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var result = client.Search<ElasticsearchProject>(s => s
    .Aggregations(a => a
        .Missing("my_missing_agg", m => m
            .Field(p => p.Name)
        )
    )
);

var agg = result.Aggs.Missing("my_missing_agg");

Object Initializer Syntax

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var request = new SearchRequest
{
    Aggregations = new Dictionary<string, IAggregationContainer>
    {
        { "my_missing_agg", new AggregationContainer
            {
                Missing = new MissingAggregator
                {
                    Field = "name"
                }
            }
        }
    }
};

var result = client.Search<ElasticsearchProject>(request);

var agg = result.Aggs.Missing("my_missing_agg");

Refer to the {ref_current}/search-aggregations-bucket-missing-aggregation.html[original docs] for more information

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