ElasticSearch - Sum of Types in Nest Query

Question

I'm using Nest to do an "_all" query on an ElasticSearchIndex. I'm specifying three types:

                s.Types(typeof(TypeA), typeof(TypeB), typeof(TypeC));
                s.Query(q => q.QueryString(qs => qs
                   .DefaultField("_all")
                   .Query(criteria.SearchText)));

I'm trying to use Aggregations to get the totals found for each type. I've tried using the Nest code like this:

s.Aggregations(a => a.Sum("typeA", b => b.Field("Type")));

But it has not worked. Does anyone know how to accomplish this with Nest?

Answer 1

The sum aggregation is actually more for summing the values of field contents within your document. In your case since you just want a count of the documents, I would suggest you use a terms aggregation on the _type field. So use the following should get what you are looking for.

 s.Aggregations(a => a.Terms("types", b=>b.Field("_type")));

Hope this helps...