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<?php |
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/** |
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* Created by PhpStorm. |
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* User: arun |
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* Date: 2019-07-07 |
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* Time: 12:59 |
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*/ |
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namespace ArunFung\ScoutElasticSearch; |
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use Laravel\Scout\Builder; |
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use Laravel\Scout\Engines\Engine; |
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use Elasticsearch\Client as ElasticSearch; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Database\Eloquent\Collection; |
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/** |
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* Class ElasticSearchEngine |
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* @package ArunFung\ScoutElasticSearch |
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*/ |
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class ElasticSearchEngine extends Engine |
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{ |
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/** |
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* ElasticSearch instance |
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* |
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* @var ElasticSearch |
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*/ |
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protected $elasticSearch; |
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/** |
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* @var ElasticSearch Index |
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*/ |
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protected $index; |
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/** |
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* Create a new engine instance. |
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* |
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* @param ElasticSearch $elasticSearch |
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* @param $index |
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* @return void |
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*/ |
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public function __construct(ElasticSearch $elasticSearch, $index) |
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{ |
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$this->elasticSearch = $elasticSearch; |
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$this->index = $index; |
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} |
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/** |
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* Update the given model in the index. |
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* |
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* @param Collection $models |
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* @return void |
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*/ |
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public function update($models) |
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{ |
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$params = []; |
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$models->each(function ($model) use (&$params) { |
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$params['body'][] = [ |
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'index' => [ |
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'_index' => $this->index, |
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'_type' => $model->searchableAs(), |
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'_id' => $model->getScoutKey() |
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] |
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]; |
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$params['body'][] = $model->toSearchableArray(); |
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}); |
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$this->elasticSearch->bulk($params); |
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} |
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/** |
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* Remove the given model from the index. |
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* |
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* @param Collection $models |
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* @return void |
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*/ |
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public function delete($models) |
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{ |
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$params = []; |
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$models->each(function ($model) use (&$params) { |
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$params['body'][] = [ |
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'delete' => [ |
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'_index' => $this->index, |
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'_type' => $model->searchableAs(), |
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'_id' => $model->getScoutKey() |
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] |
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]; |
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}); |
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$this->elasticSearch->bulk($params); |
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} |
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/** |
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* Perform the given search on the engine. |
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* |
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* @param Builder $builder |
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* @return mixed |
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*/ |
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public function search(Builder $builder) |
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{ |
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return $this->performSearch($builder, array_filter([ |
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'numericFilters' => $this->filters($builder), |
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'size' => $builder->limit, |
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])); |
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} |
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/** |
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* Perform the given search on the engine. |
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* |
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* @param Builder $builder |
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* @param int $perPage |
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* @param int $page |
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* @return mixed |
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*/ |
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public function paginate(Builder $builder, $perPage, $page) |
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{ |
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$options = [ |
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'numericFilters' => $this->filters($builder), |
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'from' => (($page - 1) * $perPage), |
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'size' => $perPage, |
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]; |
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return $this->performSearch($builder, $options); |
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} |
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/** |
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* Perform the given search on the engine. |
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* |
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* @param Builder $builder |
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* @param array $options |
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* @return mixed |
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*/ |
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protected function performSearch(Builder $builder, array $options = []) |
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{ |
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$params = [ |
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'index' => $this->index, |
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'type' => $builder->model->searchableAs(), |
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]; |
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$must = [ |
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[ |
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'query_string' => ['query' => "{$builder->query}"] |
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] |
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]; |
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if (isset($options['numericFilters']) && count($options['numericFilters'])) { |
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$must = array_merge($must, $options['numericFilters']); |
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} |
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$body = [ |
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'query' => [ |
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'bool' => [ |
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'must' => $must |
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] |
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] |
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]; |
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if (isset($options['from'])) { |
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$body['from'] = $options['from']; |
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} |
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if (isset($options['size'])) { |
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$body['size'] = $options['size']; |
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} |
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$params['body'] = $body; |
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if ($builder->callback) { |
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return call_user_func( |
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$builder->callback, |
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$this->elasticSearch, |
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$builder->query, |
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$params |
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); |
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} |
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return $this->elasticSearch->search($params); |
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} |
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/** |
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* Get the filter array for the query. |
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* |
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* @param Builder $builder |
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* @return array |
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*/ |
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protected function filters(Builder $builder) |
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{ |
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return collect($builder->wheres)->map(function ($value, $key) { |
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if (is_array($value)) { |
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return ['terms' => [$key => $value]]; |
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} |
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return ['match_phrase' => [$key => $value]]; |
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})->values()->all(); |
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} |
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/** |
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* Pluck and return the primary keys of the given results. |
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* |
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* @param mixed $results |
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* @return \Illuminate\Support\Collection |
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*/ |
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public function mapIds($results) |
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{ |
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return collect($results['hits']['hits'])->pluck('_id'); |
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} |
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/** |
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* Map the given results to instances of the given model. |
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* |
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* @param Builder $builder |
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* @param mixed $results |
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* @param Model $model |
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* @return Collection |
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*/ |
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public function map(Builder $builder, $results, $model) |
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{ |
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if ($this->getTotalCount($results) == 0) { |
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return Collection::make(); |
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} |
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$ids = $this->mapIds($results)->all(); |
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$objectIdPositions = array_flip($ids); |
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/** |
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* @var Collection $models |
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*/ |
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$models = $model->getScoutModelsByIds($builder, $ids); |
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return $models->filter(function ($model) use ($ids) { |
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return in_array($model->getScoutKey(), $ids); |
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})->sortBy(function ($model) use ($objectIdPositions) { |
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return $objectIdPositions[$model->getScoutKey()]; |
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})->values(); |
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} |
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/** |
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* Get the total count from a raw result returned by the engine. |
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* @param mixed $results |
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* @return int |
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*/ |
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public function getTotalCount($results) |
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{ |
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return $results['hits']['total']['value']; |
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} |
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/** |
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* Flush all of the model's records from the engine. |
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* |
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* @param Model $model |
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* @return void |
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*/ |
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public function flush($model) |
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{ |
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$model->newQuery()->orderBy($model->getKeyName())->unsearchable(); |
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} |
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} |
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