ajax - REST API endpoint for elasticpress autosuggest

The AJAX, which is part of Elasticpress, looks like this

$.ajax( {
    url: epas.endpointUrl,
    type: 'GET',
    dataType: 'json',
    crossDomain: true,
    data: JSON.stringify( query )
} );

Additionally I registered my endpoint

add_action( 'rest_api_init', function ( $data ) {
    register_rest_route( 'elasticpress', '/autosuggest/', [
        'methods' => 'GET',
        'callback' => 'ep_autosuggest'
    ] );
} );

The callback looks like this

function ep_autosuggest( $data ) {
    // Elasticsearch PHP Client
    $client = ClientBuilder::create()->build();
    $params = [
        'index' => 'index',
        'type' => 'post',
        'body' => $data
    ];
    $response = $client->search( $params );
    return $response;
}

The different parts work as they should. I'm struggling with getting the data from the passed object. Any ideas?

The AJAX, which is part of Elasticpress, looks like this

$.ajax( {
    url: epas.endpointUrl,
    type: 'GET',
    dataType: 'json',
    crossDomain: true,
    data: JSON.stringify( query )
} );

Additionally I registered my endpoint

add_action( 'rest_api_init', function ( $data ) {
    register_rest_route( 'elasticpress', '/autosuggest/', [
        'methods' => 'GET',
        'callback' => 'ep_autosuggest'
    ] );
} );

The callback looks like this

function ep_autosuggest( $data ) {
    // Elasticsearch PHP Client
    $client = ClientBuilder::create()->build();
    $params = [
        'index' => 'index',
        'type' => 'post',
        'body' => $data
    ];
    $response = $client->search( $params );
    return $response;
}

The different parts work as they should. I'm struggling with getting the data from the passed object. Any ideas?

• ajax
• rest-api
• endpoints

Share Improve this question edited Sep 8, 2018 at 18:35 Nicolai Grossherr asked Jan 25, 2018 at 7:15 Nicolai GrossherrNicolai Grossherr 18.9k88 gold badges6464 silver badges111111 bronze badges 2

• What data? You're already passing data with the jQuery.ajax call. What other data do you want to send, and at what stage? – janh Commented Jan 25, 2018 at 8:06
• Is it being sent correctly, have you checked your browser's dev tools? – janh Commented Jan 25, 2018 at 8:40

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2 Answers 2

Sorted by: Reset to default 8

After some inspecting the WP_REST_Request, it turned out, that the get_body() method was the one I'm looking for. Anyhow, this is what I ended up with:

add_action( 'rest_api_init', function() {
    register_rest_route( 'ep', '/as/', [
        'methods' => \WP_REST_Server::CREATABLE,
        'callback' => 'ep_autosuggest',
    ] );
} );
function ep_autosuggest( WP_REST_Request $data ) {
    // Elasticsearch PHP Client
    $client = ClientBuilder::create()->build();
    $params = [
        'index' => 'ep-test',
        'type' => 'post',
        'body' => $data->get_body()
    ];
    $response = $client->search( $params );
    return $response;
}

For anyone interested, I made a plugin out of it:

https://github/grossherr/elasticpress-autosuggest-endpoint

Thanks for the plugin Nicolai! Just wanted to point out a couple of things that weren't clear to me:

Once the plugin is installed, modify ep_autosuggest() in elasticpress-autosuggest-endpoint.php:

$params = [
    'index' => ep_get_index_name(), // get name of ES index dynamically
    'type' => 'post',
    'body' => $data->get_body()
];

Then, use http(s)://yourdomainname/wp-json/elasticpress/autosuggest/ (or whatever is specified in register_rest_route()) as the endpoint URL in the admin / ElasticPresss / Autosuggest / Settings.