ElasticSearch索引的“建议”映射不会返回结果

Question

I have an index that looks like the following

[question_index] => Array
        (
            [mappings] => Array
                (
                    [QUESTION] => Array
                        (
                            [properties] => Array
                                (
                                    [body] => Array
                                        (
                                            [type] => string
                                        )

                                    [general_suggest] => Array
                                        (
                                            [type] => completion
                                            [analyzer] => simple
                                            [payloads] => 1
                                            [preserve_separators] => 1
                                            [preserve_position_increments] => 1
                                            [max_input_length] => 50
                                        )
                                )

                        )

                )

        )

I added the suggest mapping with the following PHP code.

$param['index']    = 'question_index';
$param['type']      = 'QUESTION';
$param['body']      = array(
    '_source'       => array(
        'enabled' => true
    ),
    'properties'    => array(
        'body'      => array('type' => 'string'),
        'general_suggest'   => array(
            'type'              => 'completion',
            'index_analyzer'    => 'simple',
            'search_analyzer'   => 'simple',
            'payloads'          => true
        )
    )
);
$result     = $client->indices()->putMapping($param);

I tried to get suggested results with the following PHP code

    $param                                  = array();
    $param['index']                     = 'question_index';
    $param['body']['text']                  = 'someth';//should return 'something' as a suggest
    $param['body']['completion']['field']   = 'general_suggest';
    $result     = $client->suggest($param);

Whenever I run the above code I get the following errors.

Array
(
    [_shards] => Array
        (
            [total] => 5
            [successful] => 0
            [failed] => 5
            [failures] => Array
                (
                    [0] => Array
                        (
                            [index] => question_index
                            [shard] => 0
                            [reason] => BroadcastShardOperationFailedException[[question_index][0] ]; nested: ElasticsearchException[failed to execute suggest]; nested: ElasticsearchIllegalArgumentException[[suggest] does not support [field]]; 
                        )

Anyone know what could be the problem here? Are my indexes or the parameters I'm using setup incorrectly?

Please note that I'm using the PHP client library and not accessing the API directly via HTTP.

Answer 1

I got it to work with the following setup.

1. Setup the index first

$client      = new Elasticsearch\Client();
$param           = array();
$param['index'] = 'user_index';
$param['type']  = 'user';
$param['body']  = new stdClass();               
$client->create($param);

2. Setup the mapping for suggestions

$param  = array();
$param['index']                 = 'user_index';
$param['type']                  = 'user';
$param['body']                  = array(
    'properties'    => array(
        'body'          => array(
            'type'  => 'string'
        ),
        'autosuggest'   => array(
            'type'              => 'completion',
            'index_analyzer'    => 'simple',
            'search_analyzer'   => 'simple',
            'payloads'          => true
        )
    )
);
$client->indices()->putMapping($param);

3. Add documents to the index

//assume $user is an object available to you
$params = array();
$params['body']  = array(
    'autosuggest'   => array(
        'input'     => [$user->full_name, $user->username],
        'output'    => $user->full_name,
        'payload'   => array(
            'id'        => $user->id,
            'full_name' => $user->full_name,
            'username'  => $user->username,
            'type'      => 'user'
        )
    ),
    'body'          => $user->full_name . "(@{$user->username})",
);
$params['index'] = 'user_index';
$params['type']  = 'user';
$params['id']    = $user->id;
$client->index($params);

4. Finally, the way to get suggestions

$client             = new Elasticsearch\Client();
$param              = array();
$param['index']     = 'user_index';
$param['body']['search_suggest']['text']                    = 'search_query_here';
$param['body']['search_suggest']['completion']['field']    = 'autosuggest';
$results        = $client->suggest($param);

Answer 2

Try to wrap your query in another array like so:

$param                              = array();
$param['index']                     = 'question_index';
$param['body']['suggestions']['text']                  = 'someth';//should return 'something' as a suggest
$param['body']['suggestions']['completion']['field']   = 'general_suggest';
$result     = $client->suggest($param);

The $param variable would then look like:

$param = array(
    'index' => 'question_index',
    'body'  => array(
        'suggestions' => array(
            'text' => 'someth',
            'completion' => array(
                'field' => 'general_suggest'
            )
        )
    )
);

Note that "suggestions" has been added ; you can replace it by whatever you want.