如何使用Elastica进行查询

Question

这是我第一次使用Elastica并从ElasticSearch查询数据

对于我来说，作为初学者，我有一个关于如何使用Elastica查询以下代码的问题：

curl 'http://localhost:9200/myindex/_search?pretty=true' -d '{     
  "query" : {
    "term": {
      "click": "true"
    }   },   "facets" : {
    "matches" : {
      "terms" : {
          "field" : "pubid",
          "all_terms" : true,
          "size": 200 
      }
    }   
  } 
}'

希望有人能帮我一把。

谢谢,

Answer 1

这应该可以做到：

// Create a "global" query
$query = new Elastica_Query;

// Create the term query
$term = new Elastica_Query_Term;
$term->setTerm('click', 'true');

// Add term query to "global" query
$query->setQuery($term);

// Create the facet
$facet = new Elastica_Facet_Terms('matches');
$facet->setField('pubid')
      ->setAllTerms(true)
      ->setSize(200);

// Add facet to "global" query
$query->addFacet($facet);

// Output query
echo json_encode($query->toArray());

要运行查询，您需要连接到ES服务器

// Connect to your ES servers
$client = new Elastica_Client(array(
    'servers' => array(
        array('host' => 'localhost', 'port' => 9200),
        array('host' => 'localhost', 'port' => 9201),
        array('host' => 'localhost', 'port' => 9202),
        array('host' => 'localhost', 'port' => 9203),
        array('host' => 'localhost', 'port' => 9204),
    ),
));

并指定要对其运行查询的索引和类型

// Get index
$index = $client->getIndex('myindex');
$type = $index->getType('typename');

现在，您可以运行查询了

$type->search($query);

编辑：如果您使用的是命名空间环境和当前版本的Elastica，请相应地将创建新对象的所有行更改为

$query = new \Elastica\Query;
$facet = new \Elastica\Facet\Terms

诸若此类

Answer 2

您也可以像这样查询：(感谢http://tech.vg.no/2012/07/03/using-elastica-to-query-elasticsearch/的优秀文章)

<?php
$query = new Elastica_Query_Builder('{     
    "query" : {
        "term": {
            "click": "true"
            }   
        },
    "facets" : {
        "matches" : {
            "terms" : {
                "field" : "pubid",
                "all_terms" : true,
                "size": 200 
                }
            }   
        } 
    }');

// Create a raw query since the query above can't be passed directly to the search method used below
$query = new Elastica_Query($query->toArray());

// Create the search object and inject the client
$search = new Elastica_Search(new Elastica_Client());

// Configure and execute the search
$resultSet = $search->addIndex('blog')
                    ->addType('posts')
                    ->search($query);

// Loop through the results
foreach ($resultSet as $hit) {
    // ...
}