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Serial Differencing Aggregation Usage
editSerial Differencing Aggregation Usage
editFluent DSL example
edits => 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)
)
.SerialDifferencing("thirtieth_difference", d => d
.BucketsPath("commits")
.Lag(30)
)
)
)
)
Object Initializer syntax example
editnew SearchRequest<Project>
{
Size = 0,
Aggregations = new DateHistogramAggregation("projects_started_per_month")
{
Field = "startedOn",
Interval = DateInterval.Month,
Aggregations =
new SumAggregation("commits", "numberOfCommits") &&
new SerialDifferencingAggregation("thirtieth_difference", "commits")
{
Lag = 30
}
}
}
Example json output.
{
"size": 0,
"aggs": {
"projects_started_per_month": {
"date_histogram": {
"field": "startedOn",
"interval": "month"
},
"aggs": {
"commits": {
"sum": {
"field": "numberOfCommits"
}
},
"thirtieth_difference": {
"serial_diff": {
"buckets_path": "commits",
"lag": 30
}
}
}
}
}
}
Handling Responses
editresponse.ShouldBeValid();
var projectsPerMonth = response.Aggs.DateHistogram("projects_started_per_month");
projectsPerMonth.Should().NotBeNull();
projectsPerMonth.Buckets.Should().NotBeNull();
projectsPerMonth.Buckets.Count.Should().BeGreaterThan(0);
foreach (var item in projectsPerMonth.Buckets)
{
var commits = item.Sum("commits");
commits.Should().NotBeNull();
commits.Value.Should().NotBe(null);
}