elasticsearch 查询NEST 2.0.0-rc1聚合桶

之前在NEST（对于Elasticsearch 1.x）中，在一个聚合查询之后，我有一些代码，通过遍历所有的bucket对聚合进行了遍历和分组，如下所示：

var r = (from SingleBucket items1 in result.Aggregation.Values
select (Bucket) agg1
into items1Aggs
from col1 in items1Aggs.Items.Cast<KeyItem>()
....
select new x {}).ToList();

---

BucketAggregateData

已重命名为

BucketAggregate

并再次公开-。这将出现在GA版本中（希望是今天）

var result = _client.Search<MetaStoreEntry>(s => s
  .Aggregations(a => a
    .Filter("fullGroupBy", k => fad
      .Aggregations(e => e
        .Terms("col1", t => t
          .Field(f => f.col1)
            .Aggregations(b => b
            .Terms("col2", u => u
              .Field(f => f.col2)
            ...
            ).Size(int.MaxValue).CollectMode(TermsAggregationCollectMode.DepthFirst)
          ) ...
);