Elasticsearch 自动完成按长度排序

Question

我想用elasticsearch做一个自动完成

我试过了

然而都不符合我的预期

假设我有这样的数据：

PHP Programing
php prado framework
OOP PHP Programming
PHPMyAdmin
PHP
Php

每当我查询 PHP 时，结果都会像上面的列表一样 ^
如何让PHP先显示？而不是最后
为什么 PHP 编程比等于查询的 PHP 具有更高的权重？

注意：我已经添加了小写过滤器，因此查询被视为区分大小写，这就是为什么 php, Php, PHP 都匹配查询

Answer 1

我不知道你在做什么，所以提供更多信息会有所帮助。

但我得到了以下结果，不是建议示例，但它显示了如何使用分数进行排序

@Test
public void es() throws Exception {
    insert("value", "foo foo");
    insert("value", "foo");
    insert("value", "fooa");
    insert("value", "fao");
    insert("value", "foo potato foo bar");
    insert("value", "foo potato bar");
    insert("value", "foo potato");
    insert("value", "foo vegetable");
    insert("value", "foo vegetable");

    Thread.sleep(1000);
    SearchResponse searchResponse =
        getClient().prepareSearch()
            .setQuery(QueryBuilders.matchPhraseQuery("value", "foo"))
            .addSort(SortBuilders.scoreSort()
                .order(SortOrder.DESC))
            .execute().actionGet();

    Arrays.stream(searchResponse.getHits().getHits())
        .forEach(h -> System.out.println(h.getSource().get("value") + ": " + h.getScore()));
}

输出：

foo: 1.1177831
foo foo: 0.98798996
foo potato foo bar: 0.790392
foo potato: 0.6986144
foo vegetable: 0.6986144
foo vegetable: 0.6986144
foo potato bar: 0.55889153

Answer 2

要实现所需的行为，您需要使用 edgengrams(https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-edgengram-tokenizer.html) on a field which is using edgengram analyzer. To rank exact matches on top of any other prefix matches maintain an additional field which is not analyzed and use it in a should clause to increase its relevance(https://www.elastic.co/guide/en/elasticsearch/guide/current/query-scoring.html)

Elasticsearch 自动完成按长度排序

Elasticsearch autocomplete sort by length

autocomplete

elasticsearch

elasticsearch-plugin

elasticsearch-2.0