Elastic search模糊匹配，精确匹配显示在前

Z时代
2024-01-10
分类：问答

我想在查询上使用模糊匹配，但在结果顶部显示完全匹配。

我已经尝试了以下方法。

$return = $this->_client->search(
            array(
                'index' => self::INDEX,
                'type'  => self::TYPE,
                'body'  => array(
                    'query' => array(
                        'bool' => array(
                            'must' => array(
                                'multi_match' => array(
                                    'query'     => $query,
                                    'fields'    => array('name', 'brand', 'description'),
                                    'boost'     => 10,
                                ),
                                'fuzzy_like_this' => array(
                                    'like_text' => $query,
                                    'fields'    => array('name', 'brand', 'description'),
                                    'fuzziness' => 1,
                                ),
                            ),
                        ),
                    ),
                    'size' => '5000',
                ),
            )
        );

由于格式错误的查询错误，此方法不起作用。

有任何想法吗？

回答：

我最终没有使用模糊匹配来解决我的问题，而是使用了ngram。

/**
 * Map - Create a new index with property mapping
 */
public function map()
{
    $params['index'] = self::INDEX;
    $params['body']['settings'] = array(
        'index' => array(
            'analysis' => array(
                'analyzer' => array(
                    'product_analyzer' => array(
                        'type'      => 'custom',
                        'tokenizer' => 'whitespace',
                        'filter'    => array('lowercase', 'product_ngram'),
                    ),
                ),
                'filter' =>  array(
                    'product_ngram' => array(
                        'type' => 'nGram',
                        'min_gram' => 3,
                        'max_gram' => 5,
                    ),
                )
            ),
        )
    );
    //all the beans
    $mapping = array(
        '_source'    => array(
            'enabled' => true
        ),
        'properties' => array(
            'id'          => array(
                'type' => 'string',
            ),
            'name'        => array(
                'type'     => 'string',
                'analyzer' => 'product_analyzer',
                'boost'    => '10',
            ),
            'brand'       => array(
                'type' => 'string',
                'analyzer' => 'product_analyzer',
                'boost'    => '5',
            ),
            'description' => array(
                'type' => 'string',
            ),
            'barcodes'    => array(
                'type' => 'string'
            ),
        ),
    );
    $params['body']['mappings'][self::TYPE] = $mapping;
    $this->_client->indices()->create($params);
}
public function search($query)
{
    $return = $this->_client->search(
        array(
            'index' => self::INDEX,
            'type'  => self::TYPE,
            'body'  => array(
                'query' => array(
                    'multi_match' => array(
                        'query'  => $query,
                        'fields' => array('id', 'name', 'brand', 'description', 'barcodes'),
                    ),
                ),
                'size' => '5000',
            ),
        )
    );
    $productIds = array();
    if (!empty($return['hits']['hits'])) {
        foreach ($return['hits']['hits'] as $hit) {
            $productIds[] = $hit['_id'];
        }
    }
    return $productIds;
}