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<?php namespace Nord\Lumen\Elasticsearch\Search\Query\Joining; |
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use Nord\Lumen\Elasticsearch\Exceptions\InvalidArgument; |
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use Nord\Lumen\Elasticsearch\Search\Query\QueryDSL; |
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/** |
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* Performing full SQL-style joins in a distributed system like Elasticsearch is prohibitively expensive. |
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* Instead, Elasticsearch offers two forms of join which are designed to scale horizontally. |
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* |
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* - "nested" query |
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* Documents may contains fields of type nested. These fields are used to index arrays of objects, where each object can |
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* be queried (with the nested query) as an independent document. |
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* |
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* - "has_child" and "has_parent" queries |
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* A parent-child relationship can exist between two document types within a single index. The has_child query returns |
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* parent documents whose child documents match the specified query, while the has_parent query returns child documents |
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* whose parent document matches the specified query. |
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* |
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* @see https://www.elastic.co/guide/en/elasticsearch/reference/current/joining-queries.html |
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*/ |
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abstract class AbstractQuery extends QueryDSL |
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{ |
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const SCORE_MODE_AVG = 'avg'; |
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const SCORE_MODE_SUM = 'sum'; |
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const SCORE_MODE_MIN = 'min'; |
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const SCORE_MODE_MAX = 'max'; |
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const SCORE_MODE_SCORE = 'score'; |
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const SCORE_MODE_NONE = 'none'; |
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/** |
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* @var string |
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*/ |
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protected $scoreMode; |
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/** |
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* @return array |
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*/ |
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abstract protected function getValidScoreModes(); |
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/** |
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* @return string |
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*/ |
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public function getScoreMode() |
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{ |
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return $this->scoreMode; |
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} |
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/** |
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* @param string $scoreMode |
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* |
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* @return $this |
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*/ |
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public function setScoreMode($scoreMode) |
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{ |
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$this->assertScoreMode($scoreMode); |
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$this->scoreMode = $scoreMode; |
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return $this; |
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} |
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/** |
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* @param string $scoreMode |
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* |
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* @throws InvalidArgument |
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*/ |
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protected function assertScoreMode($scoreMode) |
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{ |
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$validModes = $this->getValidScoreModes(); |
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if (!in_array($scoreMode, $validModes)) { |
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throw new InvalidArgument(sprintf( |
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'HasChild Query `score_mode` must be one of "%s", "%s" given.', |
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implode(', ', $validModes), |
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$scoreMode |
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)); |
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} |
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} |
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} |
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digiaonline /
lumen-elasticsearch
