How do i highlight my result in elasticsearch? - php

Question

I am not able to highlight my result, which part of my query is wrong?
PHPClient for elasticsearch throws exception on execution.
$query = [
"query" => [
"filtered" => [
"query" => [
"bool" => [
"should" => [
[
'query_string' => [
'fields' => [
'Title.title^4',
'Title.ngrams_front^2',
'Title.ngrams_back'
],
'defaultOperator' => 'or',
'query' => $paramsObj->q
]
],
[
'query_string' => [
'auto_generate_phrase_queries' => 0,
'enable_position_increments' => false,
'fields' => [
'Title.title',
'Address',
'keys'
],
'query' => $paramsObj->q,
'use_dis_max' => false,
'boost' => 2
]
],
[
'fuzzy' => [
'Title.title' => [
'value' => $paramsObj->q,
'boost' => 1,
'min_similarity' => 0.5,
'max_expansions' => 20,
'prefix_length' => 0
]
]
]
]
]
],
"filter" => $filters
]
],
"highlight" => [
"fields" => [
'Title.title' => [ "pre_tags" => "<em>", "post_tags" => "</em>" ]
]
]
];
First i tried highlighting at filtered level, then i googled and found out i need to do at query level at top of filtered level, so i did but still it throws exception.
Fatal error: Uncaught exception 'Guzzle\Http\Exception\ClientErrorResponseException'
If at all anyone can help, kindly help.

Answer 1

Try something like this:
$query = array(
'query' => array(
'bool' => array(
'should' => array(
'fuzzy' => array(
'name' => array(
'value' => $serachstring,
'boost' => 1,
'min_similarity' => 0.5,
'max_expansions' => 20,
'prefix_length' => 0
),
),
// ...
)
),
),
'highlight' => array(
"pre_tags" => "<em>",
"post_tags" => "</em>",
'fields' => array(
'name' => (object) array()
)
),
);