ElasticSearch .NET Nest Sub Aggregation - elasticsearch

Question

Consider the following aggregation and sub aggregation:
.Aggregations(a => a
.Terms("ByCustomerByImpressionCount", tad => tad
.Field(o => o.CustomerName)
.OrderDescending("sumImpressionCount")
.Aggregations(ad => ad
.Sum("sumImpressionCount", sad => sad
.Field(o => o.ImpressionCount)
)
)
))
The query works fine, and I get results.
I can access the top aggregation with:
var agg = results.Aggs.Terms("ByCustomerByImpressionCount");
According to the docs, I should be able to get the sub agg with:
var subAgg = agg.Aggs.Sum("sumImpressionCount");
But Aggs isn't even a property of agg - any ideas?
EDIT:
This is the only way I've been able to get to the sub aggregation:
PopulateList(results.Aggs.Terms("CustomersByImpressionCount").Items, CustomersByImpressionCount);
private void PopulateList(IList<KeyItem> items, List<DataContainer> listToPopulate)
{
items.ForEach(item =>
{
listToPopulate
.Add(new DataContainer() { Name = item.Key, Sum = ((ValueMetric)item.Aggregations.First().Value).Value });
});
}
...but this seems to be overly complicated. Here is the ES query:
"query": {
"bool": {
"must": [
{ "range": { "requestedShipDate": {
"gte": "2014-11-26",
"lte": "2015-02-03"
} }
}
],
"must_not": [
{"terms": {
"status": [
"Order Shipped",
"Canceled",
"Completed"
]
}}
]
}
},
"aggs": {
"ByCustomerByImpressionCount": {
"terms": {
"field": "customerName",
"order": { "sumImpressionCount": "desc" }
},
"aggs": {
"sumImpressionCount": { "sum": { "field": "impressionCount" }}
}
}}
And here is partial response:
"ByCustomerByImpressionCount": {
"doc_count_error_upper_bound": -1,
"sum_other_doc_count": 26785,
"buckets": [
{
"key": "<One of our customers>",
"doc_count": 1722,
"sumImpressionCount": {
"value": 9583176
}
}

Answer 1

The documentation is wrong. We'll fix that ASAP.
Here is the correct way to access your aggregations:
var terms = results.Aggs.Terms("ByCustomerByImpressionCount");
foreach(var term in terms.Items)
{
var sum = term.Sum("sumImpressionCount");
}