Filter on aggregated bucket keys? - elasticsearch

Question

Given data model structure like this,
{
Id: 123,
"string_facet": [
{
"name": "make",
"value": "Audi"
},
{
"name": "carListType",
"value": "PERSON EU"
},
{
"name": "modelType",
"value": ""
},
{
"name": "engineBrand",
"value": "APT"
},
{
"name": "typeDescription",
"value": "8D2"
}
],
"number_facet": [
{
"name": "typeNumber",
"value": 4614
},
{
"name": "serialNumber",
"value": 2
},
{
"name": "engineSize",
"value": 18
},
{
"name": "horsePower",
"value": 125
},
{
"name": "kw",
"value": 92
},
{
"name": "engineVolume",
"value": 1781
},
{
"name": "listType",
"value": 0
}
],
"dateTime_facet": [
{
"name": "fromDate",
"value": "1999-04-01T00:00:00"
},
{
"name": "toDate",
"value": "2000-10-01T00:00:00"
}
]
}
I want to get aggregates facet names, and values per name. However, I'm only interested in facets that have specific names, such as: make and engineBrand. Note that facets are of type nested.
I have tried the following .NEST expression, but it still returns all of the facet names.
.Global("global", g => g
.Aggregations(ag => ag
.Filter("global_makes", f => f
.Filter(ff => ff
.Nested(n => n
.Path("string_facet")
.Filter(pf => pf.Term("string_facet.name", "make")))
)
.Aggregations(agg => agg
.Nested("nested_string_facet", nested => nested
.Path("string_facet")
.Aggregations(stringFacet => stringFacet
.Terms("name", nameAgg => nameAgg.Field("string_facet.name").Size(0)
.Aggregations(nameAggNext => nameAggNext
.Terms("value", valueAgg => valueAgg.Field("string_facet.value").Size(0))
)
)
)
)
)
)
)
)
);
I have a filter within global (to lose scope of a passed in query), and then filter only on string_facet.name which match "make", but results still include all other names as well. How do I filter out aggregation to include only buckets where name is "make"?

Answer 1

This helped. https://github.com/elastic/elasticsearch/issues/4449
Essentially had to move filter part deeper into aggregation.