Post.md

Post Filter

More info about post filter is in the official elasticsearch docs

The post filters are filters that are applied to the search hits at the very end of a search request, after aggregations have already been calculated.

To add post filters use addPostFilter method in Search object. addPostFilter works like query and filter adders - you can add as many filters as you want and bool filter will be formed if endpoint has multiple filters or bool type parameter was provided.

Simple example

{
  "post_filter": { 
    "term": { "color": "red" }
  }
}

And now the query via DSL:

$termFilter = new TermFilter('color', 'red');

$search = new Search();
$search->addPostFilter($termFilter);
$queryArray = $search->toArray();

Bool example

{
    "post_filter": {
        "bool": {
            "must": [
                {
                    "term": {
                        "color": "red"
                    }
                },
                {
                    "term": {
                        "brand": "ana"
                    }
                }
            ]
        }
    }
}

And now the query via DSL:

$termFilter1 = new TermFilter('color', 'red');
$termFilter2 = new TermFilter('brand', 'ana');

$search = new Search();
$search->addPostFilter($termFilter1);
$search->addPostFilter($termFilter2);
$queryArray = $search->toArray();