Count unique records by field added

[k-samuel]

Count unique records by field added Feature Request

IndexInterface->aggregate() method is marked as deprecated but retained for backward compatibility.
use
IndexInterface->aggregation() method instead, it returns AggregationQueryResult instead of an array

$query = (new AggregationQuery())
         ->filters($filters) 
         ->countTotal() // count unique records by field
         ->countItems() // count unique records by field value
         ->sort();

$queryResult =  $search->aggregation($query);
$oldResults = $queryResult->getValues() // return results same as deprecated IndexInterface->aggregate()
$fieldCounts = $queryResult->getFields() // return count of unique records for each field

Demo updated