class Elasticsearch::DSL::Search::Aggregations::DateHistogram

A multi-bucket aggregation which returns a histogram for date fields

@example

search do
  aggregation :daily do
    field             'published_at'
    calendar_interval 'day'
    format            'yyyy-MM-dd'
  end
end

@see www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-datehistogram-aggregation.html