IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Reverse Nested Aggregation Usage
editReverse Nested Aggregation Usage
editFluent DSL example
edita => a
.Nested("tags", n => n
.Path(p => p.Tags)
.Aggregations(aa => aa
.Terms("tag_names", t => t
.Field(p => p.Tags.Suffix("name"))
.Aggregations(aaa => aaa
.ReverseNested("tags_to_project", r => r
.Aggregations(aaaa => aaaa
.Terms("top_projects_per_tag", tt => tt
.Field(p => p.Name)
)
)
)
)
)
)
)
Object Initializer syntax example
editnew NestedAggregation("tags")
{
Path = "tags",
Aggregations = new TermsAggregation("tag_names")
{
Field = "tags.name",
Aggregations = new ReverseNestedAggregation("tags_to_project")
{
Aggregations = new TermsAggregation("top_projects_per_tag")
{
Field = Field<Project>(p => p.Name)
}
}
}
}
Example json output.
{
"tags": {
"nested": {
"path": "tags"
},
"aggs": {
"tag_names": {
"terms": {
"field": "tags.name"
},
"aggs": {
"tags_to_project": {
"reverse_nested": {},
"aggs": {
"top_projects_per_tag": {
"terms": {
"field": "name"
}
}
}
}
}
}
}
}
}
Handling Responses
editresponse.ShouldBeValid();
var tags = response.Aggregations.Nested("tags");
tags.Should().NotBeNull();
var tagNames = tags.Terms("tag_names");
tagNames.Should().NotBeNull();
foreach (var tagName in tagNames.Buckets)
{
tagName.Key.Should().NotBeNullOrEmpty();
tagName.DocCount.Should().BeGreaterThan(0);
var tagsToProjects = tagName.ReverseNested("tags_to_project");
tagsToProjects.Should().NotBeNull();
var topProjectsPerTag = tagsToProjects.Terms("top_projects_per_tag");
topProjectsPerTag.Should().NotBeNull();
foreach (var topProject in topProjectsPerTag.Buckets)
{
topProject.Key.Should().NotBeNullOrEmpty();
topProject.DocCount.Should().BeGreaterThan(0);
}
}