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Cardinality aggregationedit
A single-value metrics aggregation that calculates an approximate count of distinct values.
Fluent DSLedit
var result = client.Search<ElasticsearchProject>(s => s .Aggregations(a => a .Cardinality("my_cardinality_agg", c => c .Field(p => p.Followers.First().FirstName) ) ) ); var agg = result.Aggs.Cardinality("my_cardinality_agg");
Object Initializer Syntaxedit
var request = new SearchRequest { Aggregations = new Dictionary<string, IAggregationContainer> { { "my_cardinality_agg", new AggregationContainer { Cardinality = new CardinalityAggregator { Field = "followers.firstName" } } } } }; var result = client.Search<ElasticsearchProject>(request); var agg = result.Aggs.Cardinality("my_cardinality_agg");
Refer to the {ref_current}/search-aggregations-metrics-cardinality-aggregation.html[original docs] for more information.