add aggregation, stats and suggester to elasticsearch

extensions/elasticsearch/CHANGELOG.md

@@ -11,6 +11,9 @@ Yii Framework 2 elasticsearch extension Change Log
 - Enh #4048: Added `init` event to `ActiveQuery` classes (qiangxue)
 - Enh #4086: changedAttributes of afterSave Event now contain old values (dizews)
 - Enh: Make error messages more readable in HTML output (cebe)
+- Enh: Added support for query stats (cebe)
+- Enh: Added support for query suggesters (cebe)
+- Chg #4451: Removed support for facets and replaced them with aggregations (cebe, tadaszelvys)
 - Chg: asArray in ActiveQuery is now equal to using the normal Query. This means, that the output structure has changed and `with` is supported anymore. (cebe)
 - Chg: Deletion of a record is now also considered successful if the record did not exist. (cebe)
 - Chg: Requirement changes: Yii now requires elasticsearch version 1.0 or higher (cebe)

extensions/elasticsearch/QueryBuilder.php

@@ -98,19 +98,24 @@ class QueryBuilder extends \yii\base\Object
             $parts['filter'] = $whereFilter;
         }
 
-        if($query->highlight) {
+        if (!empty($query->highlight)) {
             $parts['highlight'] = $query->highlight;
         }
+        if (!empty($query->aggregations)) {
+            $parts['aggregations'] = $query->aggregations;
+        }
+        if (!empty($query->stats)) {
+            $parts['stats'] = $query->stats;
+        }
+        if (!empty($query->suggest)) {
+            $parts['suggest'] = $query->suggest;
+        }
 
         $sort = $this->buildOrderBy($query->orderBy);
         if (!empty($sort)) {
             $parts['sort'] = $sort;
         }
 
-        if (!empty($query->facets)) {
-            $parts['facets'] = $query->facets;
-        }
-
         $options = [];
         if ($query->timeout !== null) {
             $options['timeout'] = $query->timeout;