php - 如何在 elasticsearch 中使用 Unicode 字符进行搜索？

Question

我已经将 MySQL 列索引到 elasticsearch 中，并且该列有一些 AR/EN/RO 语言值。 如何使用 unicode 字符串在这些索引中进行搜索？

$hosts = ['localhost:9200'];              
$client = \Elasticsearch\ClientBuilder::create()->setHosts($hosts)->build();  

$body = '{  "query": {
"filtered": {
  "query": {
    "match_all": {}
  },
  "filter": {
    "bool": {
      "must": [
        {"query": {"wildcard": {"text": {"value": "*'.$term.'*"}}}},
        {"query": {"wildcard": {"group": {"value": "hotels_cities"}}}}
      ]
    }
  }
}  }}';



$params['index'] = 'my_custom_index_name';
$params['type']  = 'translator_translations';
$params['body'] = $body;

$results = $client->search($params);

输出命中为零。

-有一个叫做分析器的东西，但是没有关于如何在 PHP 中使用它的信息。

Answer 1

我想我找到了如何在 Elasticsearch 中索引 unicode 语言字符的答案，希望这对任何人都有用。

• 首先您必须设置您的索引名称

• 其次使用过滤器和语言分析器设置您的新语言设置，像这样:

  $client = ClientBuilder::create()       // Instantiate a new ClientBuilder
              ->setHosts(['localhost:9200'])      // Set the hosts
              ->build();
  
  $lang = 'el'; // Greek in my case
  
  $param['index'] = 'test_' . $lang; // index name
  
  // uncomment this line if you want to delete an existing index
  // $response = $client->indices()->delete($param);
  
  $body = '{
    "settings": {
      "analysis": {
        "filter": {
          "greek_stop": {
            "type":       "stop",
            "stopwords":  "_greek_" 
          },
          "greek_lowercase": {
            "type":       "lowercase",
            "language":   "greek"
          },
          "greek_keywords": {
            "type":       "keyword_marker",
            "keywords":   ["παράδειγμα"] 
          },
          "greek_stemmer": {
            "type":       "stemmer",
            "language":   "greek"
          }
        },
        "analyzer": {
          "greek": {
            "tokenizer":  "standard",
            "filter": [
              "greek_lowercase",
              "greek_stop",
              "greek_keywords",
              "greek_stemmer"
            ]
          }
        }
      }
    }
  }';
  
  $param['body'] = $body; // store the JSON body as a parameter in the main array
  
  $response = $client->indices()->create($param);
  

然后开始用希腊字符索引你的值