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# 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" : {
"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
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