From 95de2cc96b47daceed492f2e9c7d68d045008d38 Mon Sep 17 00:00:00 2001
From: Aivaras Gotovskis <aivaras.gotovskis@ongr.io>
Date: Wed, 8 Jul 2015 13:49:31 +0300
Subject: [PATCH] Add nested aggregation example.
---
docs/Aggregation/index.md | 61 +++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/docs/Aggregation/index.md b/docs/Aggregation/index.md
index 571f9c1..ffc3dfe 100644
--- a/docs/Aggregation/index.md
+++ b/docs/Aggregation/index.md
@@ -16,6 +16,67 @@ $queryArray = $search->toArray();
There are 2 types of aggregation: bucketing and metric. The only difference in using them is that metric bucketing
aggregations supports nesting while metric aggregations will ignore any set nested aggregations.
+## Nesting aggregations
+
+Bucketing aggregation can have anu number nested aggregations and nesting can go to unlimited depth.
+
+Example nested aggregation.
+```JSON
+{
+ "aggregations": {
+ "agg_color": {
+ "terms": {
+ "field": "color"
+ },
+ "aggregations": {
+ "agg_avg_price": {
+ "avg": {
+ "field": "price"
+ }
+ },
+ "agg_brand": {
+ "terms": {
+ "field": "brand"
+ },
+ "aggregations": {
+ "agg_avg_price": {
+ "avg": {
+ "field": "price"
+ }
+ }
+ }
+ }
+ }
+ },
+ "agg_avg_price": {
+ "avg": {
+ "field": "price"
+ }
+ }
+ }
+}
+```
+
+```php
+$avgPriceAggregation = new AvgAggregation('avg_price');
+$avgPriceAggregation->setField('price');
+
+$brandTermAggregation = new TermsAggregation('brand');
+$brandTermAggregation->setField('brand');
+$brandTermAggregation->addAggregation($avgPriceAggregation);
+
+$colorTermsAggregation = new TermsAggregation('color');
+$colorTermsAggregation->setField('color');
+$colorTermsAggregation->addAggregation($avgPriceAggregation);
+$colorTermsAggregation->addAggregation($brandTermAggregation);
+
+$search = new Search();
+$search->addAggregation($colorTermsAggregation);
+$search->addAggregation($avgPriceAggregation);
+
+$queryArray = $search->toArray();
+```
+
## Metric Aggregations
- [Avg](Avg.md)
- [Cardinality](Cardinality.md)
--
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