# Missing Aggregation > More info about missing aggregation is in the [official elasticsearch docs][1] A field data based single bucket aggregation, that creates a bucket of all documents in the current document set context that are missing a field value. ## Simple example ```JSON { "aggregations" : { "agg_products_without_a_price" : { "missing" : { "field" : "price" } } } } ``` And now the query via DSL: ```php $missingAggregation = new MissingAggregation('products_without_a_price', 'price'); $search = new Search(); $search->addAggregation($missingAggregation); $queryArray = $search->toArray(); ``` [1]: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-missing-aggregation.html