How to use highlight_query with Elastica / FOSElasticaBundle? - php

Question

I'm new to Elastica and I'm searching for a way to highlight nested query results with highlight_query. I checked the code and $query->setHighlight() accepts only an array as a parameter. Maybe there's another way to achieve this result using Elastica.
This is the json query I'm trying to translate to Elastica:
{
"query": {
"bool": {
"must": [
{
"match": {
"publishAt": "2016"
}
},
{
"nested": {
"path": "translations",
"query": {
"multi_match": {
"query": "leadership",
"fields": [
"translations.*"
]
}
}
}
},
{
"nested": {
"path": "translations",
"query": {
"bool": {
"must": [
{
"match": {
"translations.locale": "fr"
}
}
]
}
}
}
}
]
}
},
"highlight": {
"highlight_query": {
"match": {
"translations.*": "leadership"
}
},
"fields": {
"translations.*": {}
}
}
I'm using FosElasticaBundle and I have this query without the highlight:
$query = new Query();
$bool = new Bool();
$yearQuery = new Match();
$yearQuery->setField('publishAt', 2016);
$bool->addMust($yearQuery);
$nestedQuery = new Query\Nested();
$nestedQuery->setPath('translations');
$multiMatch = new Query\MultiMatch();
$multiMatch->setQuery($string);
$multiMatch->setFields('translations.*');
$nestedQuery->setQuery($multiMatch);
$nestedQuery2 = new Query\Nested();
$nestedQuery2->setPath('translations');
$nestedBool = new Bool();
$localeQuery = new Match();
$localeQuery->setField('translations.locale', $request->getLocale());
$nestedBool->addMust($localeQuery);
$nestedQuery2->setQuery($nestedBool);
$bool->addMust($nestedQuery);
$bool->addMust($nestedQuery2);
$query->setQuery($bool);
$results = $finder->findHybrid($query);