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WARNING: Version 5.x has passed its EOL date.

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 [2.x] ›Aggregations ›Pipeline Aggregations

Min Bucket Aggregation Usage

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IMPORTANT: This documentation is no longer updated.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

Min Bucket Aggregation Usage

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Fluent DSL example

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s => s
.Size(0)
.Aggregations(a => a
    .DateHistogram("projects_started_per_month", dh => dh
        .Field(p => p.StartedOn)
        .Interval(DateInterval.Month)
        .Aggregations(aa => aa
            .Sum("commits", sm => sm
                .Field(p => p.NumberOfCommits)
            )
        )
    )
    .MinBucket("min_commits_per_month", aaa => aaa
        .BucketsPath("projects_started_per_month>commits")
    )
)

Object Initializer syntax example

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new SearchRequest<Project>()
{
    Size = 0,
    Aggregations = new DateHistogramAggregation("projects_started_per_month")
    {
        Field = "startedOn",
        Interval = DateInterval.Month,
        Aggregations = new SumAggregation("commits", "numberOfCommits")
    }
    && new MinBucketAggregation("min_commits_per_month", "projects_started_per_month>commits")
}

Example json output.

{
  "size": 0,
  "aggs": {
    "projects_started_per_month": {
      "date_histogram": {
        "field": "startedOn",
        "interval": "month"
      },
      "aggs": {
        "commits": {
          "sum": {
            "field": "numberOfCommits"
          }
        }
      }
    },
    "min_commits_per_month": {
      "min_bucket": {
        "buckets_path": "projects_started_per_month>commits"
      }
    }
  }
}

Handling Responses

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response.ShouldBeValid();

var projectsPerMonth = response.Aggs.DateHistogram("projects_started_per_month");
projectsPerMonth.Should().NotBeNull();
projectsPerMonth.Buckets.Should().NotBeNull();
projectsPerMonth.Buckets.Count.Should().BeGreaterThan(0);

var minCommits = response.Aggs.MinBucket("min_commits_per_month");
minCommits.Should().NotBeNull();
minCommits.Value.Should().BeGreaterThan(0);
minCommits.Keys.Should().NotBeNull();
minCommits.Keys.Count.Should().BeGreaterOrEqualTo(1);
foreach (var key in minCommits.Keys)
    key.Should().NotBeNullOrEmpty();
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