elastica with terms and facets - php

Question

I am faily new to elasticsearch and try to get along with elastica. I try to find out what Items are often togehter in a set of items when one of them is 2 and/or 7. So the index contains a lot of nested sets of items. The mutual items will be extracted with facets. But I don't seem to get the following query converted to elastica:
curl -X POST "http://localhost:9200/ratings/rating/_search?pretty=true" -d '
{
"query": {
"terms": {
"bookid": [2, 7],
"minimum_match" : 1
}
},
"size": 0,
"facets": {
"bookid": {
"terms": {
"field": "bookid"
}
}
}
}'
I was trying this:
// Load index
$index = $client->getIndex('ratings');
$type = $index->getType('rating');
// We want a Terms query.
$query = new Elastica_Query_Terms();
// Setting Terms
$query->setTerms('bookid', $bookids);
// Facets
$facet = new Elastica_Facet_Query('matches');
$facet->setField( 'bookid' )
->setSize(100);
$facet->setQuery($query);
$resultSet = $type->search($query);
return $resultSet;
but no luck so far. How do I add the facet properties?

Answer 1

Elastica query classes have an addFacet method, so rather than set the query on the facet, it makes more sense to add the facet to the query.
$facet = new Elastica_Facet_Query('matches');
$facet->setField('bookid')
->setSize(100);
$query = new Elastica_Query_Terms();
$query->setTerms('bookid', $bookids);
$query->addFacet($facet);