Date histrogram aggregation response class

[RolfDeVries]

Elastic.Clients.Elasticsearch version:
8.13.5

Elasticsearch version:
N/A

.NET runtime version:
.Net 8.0

Operating system version:
N/A

Description of the problem including expected versus actual behavior:
I'm upgrading from NEST 7.latest to the new Elastic.Clients.Elasticsearch version.
And I'm missing some features that are not yet supported

Steps to reproduce:

1. Create code to call the search API with a date histogram in it

2. Trying to parse the response of the Aggregations in the Search Api:

           var bucket = agg as DateHistogramAggregate;
           return bucket?.Buckets.NotNull()
                  .ToDictionary(s => s.Date, s => s.DocCount)
   

Expected behavior
In the NEST 7 version, the properties Date existed in the buckets of the aggregate
In the Elastic.Client.Elasticsearch 8 these field is missing, please add this back

Provide ConnectionSettings (if relevant):

Provide DebugInformation (if relevant):

[flobernd]

Hi @RolfDeVries,

for now you could try the following workaround:

var histogram = searchResponse.Aggregations?.GetDateHistogram("aggregation-name");
var dict = histogram?.Buckets.ToDictionary(k => DateTimeOffset.FromUnixTimeMilliseconds(k.Key).Date, v => v.DocCount);

It definitely makes sense to simplify access to the date.

There are probably more places where date values are generated as long instead of DateTime. I will do some research to see if it would be desired to generate DateTime in all of these places to improve usability.

[RolfDeVries]

Thanks, the workaround will do for now. But I expect more places indeed.
This would be very much appreciated by many developers!