README

Elastic Adapter is an adapter for official PHP Elasticsearch client. It's designed to simplify basic index and document operations.

Contents

• Compatibility
• Installation
• Index Management
• Document Management

Compatibility

The current version of Elastic Adapter has been tested with the following configuration:

• PHP 7.2-7.4
• Elasticsearch 7.x

Installation

The library can be installed via Composer:

composer require babenkoivan/elastic-adapter

Index Management

IndexManager can be used to manipulate indices. It uses Elasticsearch client as a dependency, therefore you need to initiate the client before you create an IndexManager instance:

$client = \Elasticsearch\ClientBuilder::fromConfig([
  'hosts' => [
      'localhost:9200'
  ]
]);

$indexManager = new \ElasticAdapter\Indices\IndexManager($client);

The manager provides a list of useful methods, which are listed below.

Create

Creates an index, either with the default settings and mapping:

$index = new \ElasticAdapter\Indices\Index('my_index');

$indexManager->create($index);

or configured accordingly to your needs:

$mapping = (new \ElasticAdapter\Indices\Mapping())
    ->text('title', [
        'boost' => 2,
    ])
    ->keyword('tag', [
        'null_value' => 'NULL'
    ])
    ->geoPoint('location');

$settings = (new \ElasticAdapter\Indices\Settings())
    ->index([
        'number_of_replicas' => 2,
        'refresh_interval' => -1
    ]);

$index = new \ElasticAdapter\Indices\Index('my_index', $mapping, $settings);

$indexManager->create($index);

Drop

Deletes an index:

$indexManager->drop('my_index');

Put Mapping

Updates an index mapping:

$mapping = (new \ElasticAdapter\Indices\Mapping())
    ->text('title', [
        'boost' => 2,
    ])
    ->keyword('tag', [
        'null_value' => 'NULL'
    ])
    ->geoPoint('location');

$indexManager->putMapping('my_index', $mapping);

Put Settings

Updates an index settings:

$settings = (new \ElasticAdapter\Indices\Settings())
    ->analysis([
        'analyzer' => [
            'content' => [
                'type' => 'custom',
                'tokenizer' => 'whitespace'    
            ]
        ]
    ]);

$indexManager->putSettings('my_index', $settings);

Exists

Checks if an index exists:

$indexManager->exists('my_index');

Open

Opens an index:

$indexManager->open('my_index');

Close

Closes an index:

$indexManager->close('my_index');

Document Management

Similarly to IndexManager, the DocumentManager class also depends on Elasticsearch client:

$client = \Elasticsearch\ClientBuilder::fromConfig([
  'hosts' => [
      'localhost:9200'
  ]
]);

$documentManager = new \ElasticAdapter\Documents\DocumentManager($client);

Index

Adds a document to an index:

$documents = [
    new ElasticAdapter\Documents\Document('1', ['title' => 'foo']),
    new ElasticAdapter\Documents\Document('2', ['title' => 'bar']),
];

$documentManager->index('my_index', $documents);

There is also an option to refresh index immediately:

$documentManager->index('my_index', $documents, true);

Delete

Removes a document from index:

$documents = [
    new ElasticAdapter\Documents\Document('1', ['title' => 'foo']),
    new ElasticAdapter\Documents\Document('2', ['title' => 'bar']),
];

$documentManager->delete('my_index', $documents);

If you want an index to be refreshed immediately pass true as the third argument:

$documentManager->delete('my_index', $documents, true);

You can also delete documents using query:

$documentManager->deleteByQuery('my_index', ['match_all' => new \stdClass()]);

Search

Finds documents in an index:

$request = new \ElasticAdapter\Search\SearchRequest([
    'match' => [
        'message' => 'test'
    ]
]);

$request->setHighlight([
    'fields' => [
        'message' => [
            'type' => 'plain',
            'fragment_size' => 15,
            'number_of_fragments' => 3,
            'fragmenter' => 'simple'
        ]
    ]
]);

$request->setSuggest([
    'my_suggest' => [
        'text' => 'test',
        'term' => [
            'field' => 'message'
        ]
    ]
]);

$request->setSource(['message', 'post_date']);

$request->setCollapse([
    'field' => 'user'
]);

$request->setSort([
    ['post_date' => ['order' => 'asc']],
    '_score'
]);

$request->setFrom(0)->setSize(20);

$response = $documentManager->search('my_index', $request);

// total number of matched documents
$total = $response->getHitsTotal(); 

// corresponding hits
$hits = $response->getHits();

// document, highlight or raw representation of the hit
foreach ($hits as $hit) {
    $document = $hit->getDocument();
    $highlight = $hit->getHighlight();
    $raw = $hit->getRaw();
}

// suggestions
$suggestions = $response->getSuggestions();