From 57cea2aa64ee389255b14c4fcd225171db85eba8 Mon Sep 17 00:00:00 2001
From: Aivaras Gotovskis <aivaras.gotovskis@ongr.io>
Date: Fri, 10 Jul 2015 12:06:05 +0300
Subject: [PATCH] Add nested aggregation doc.
---
docs/Aggregation/Nested.md | 37 +++++++++++++++++++++++++++++++++++++
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+# Nested Aggregation
+
+> More info about nested aggregation is in the [official elasticsearch docs][1]
+
+A special single bucket aggregation that enables aggregating nested documents.
+
+## Simple example
+
+```JSON
+{
+ "aggregations" : {
+ "agg_resellers" : {
+ "nested" : {
+ "path" : "resellers"
+ },
+ "aggregations" : {
+ "agg_min_price" : { "min" : { "field" : "resellers.price" } }
+ }
+ }
+ }
+}
+```
+
+And now the query via DSL:
+
+```php
+$minAggregation = new MinAggregation('min_price', 'resellers.price');
+$nestedAggregation = new NestedAggregation('resellers', 'resellers');
+$nestedAggregation->addAggregation($minAggregation);
+
+$search = new Search();
+$search->addAggregation($nestedAggregation);
+
+$queryArray = $search->toArray();
+```
+
+[1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-nested-aggregation.html
--
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