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<?php |
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namespace Staudenmeir\EloquentHasManyDeep\Eloquent\Relations\ThirdParty\LaravelHasManyMerged; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Eloquent\Collection; |
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use Illuminate\Database\Query\JoinClause; |
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use Korridor\LaravelHasManyMerged\HasManyMerged as Base; |
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use Staudenmeir\EloquentHasManyDeepContracts\Interfaces\ConcatenableRelation; |
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/** |
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* @copyright Based on package by Constantin Graf (korridor): https://github.com/korridor/laravel-has-many-merged |
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*/ |
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class HasManyMerged extends Base implements ConcatenableRelation |
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{ |
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/** |
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* Append the relation's through parents, foreign and local keys to a deep relationship. |
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* |
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* @param \Illuminate\Database\Eloquent\Model[] $through |
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* @param array $foreignKeys |
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* @param array $localKeys |
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* @param int $position |
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* @return array |
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*/ |
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public function appendToDeepRelationship(array $through, array $foreignKeys, array $localKeys, int $position): array |
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{ |
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if ($position === 0) { |
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$foreignKeys[] = function (Builder $query, ?Builder $parentQuery = null) { |
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if ($parentQuery) { |
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$this->getRelationExistenceQuery($this->query, $parentQuery); |
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} |
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$query->mergeConstraintsFrom($this->query); |
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}; |
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$localKeys[] = $this->localKey; |
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} else { |
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$foreignKeys[] = function (Builder $query, JoinClause $join) { |
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$join->on( |
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function (JoinClause $join) { |
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foreach ($this->foreignKeys as $foreignKey) { |
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$join->orOn($foreignKey, '=', $this->getQualifiedParentKeyName()); |
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} |
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} |
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); |
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}; |
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$localKeys[] = null; |
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} |
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return [$through, $foreignKeys, $localKeys]; |
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} |
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/** |
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* Get the custom through key for an eager load of the relation. |
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* |
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* @param string $alias |
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* @return array |
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*/ |
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public function getThroughKeyForDeepRelationships(string $alias): array |
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{ |
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$columns = []; |
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foreach ($this->foreignKeys as $i => $foreignKey) { |
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$columns[] = "$foreignKey as $alias" . ($i > 0 ? "_$i" : ''); |
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} |
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return $columns; |
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} |
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/** |
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* Set the constraints for an eager load of the deep relation. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @param array $models |
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* @return void |
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*/ |
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public function addEagerConstraintsToDeepRelationship(Builder $query, array $models): void |
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{ |
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$this->addEagerConstraints($models); |
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$query->mergeConstraintsFrom($this->query); |
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} |
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/** |
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* Match the eagerly loaded results for a deep relationship to their parents. |
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* |
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* @param array $models |
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* @param \Illuminate\Database\Eloquent\Collection $results |
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* @param string $relation |
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* @return array |
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*/ |
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public function matchResultsForDeepRelationship(array $models, Collection $results, string $relation): array |
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{ |
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$dictionary = $this->buildDictionaryForDeepRelationship($results); |
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foreach ($models as $model) { |
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if (isset($dictionary[$key = $model->getAttribute($this->localKey)])) { |
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$model->setRelation( |
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$relation, |
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$this->getRelated()->newCollection($dictionary[$key])->unique($this->getRelated()->getKeyName()) |
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); |
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} |
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} |
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return $models; |
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} |
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/** |
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* Build the model dictionary for a deep relation. |
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* |
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* @param \Illuminate\Database\Eloquent\Collection $results |
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* @return array |
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*/ |
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protected function buildDictionaryForDeepRelationship(Collection $results): array |
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{ |
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$dictionary = []; |
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$foreignKeyNames = array_map( |
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fn ($i) => 'laravel_through_key' . ($i > 0 ? "_$i" : ''), |
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range(0, count($this->foreignKeys) - 1) |
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); |
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foreach ($results as $result) { |
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foreach ($foreignKeyNames as $foreignKeyName) { |
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$foreignKeyValue = $result->{$foreignKeyName}; |
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if (!isset($dictionary[$foreignKeyValue])) { |
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$dictionary[$foreignKeyValue] = []; |
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} |
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$dictionary[$foreignKeyValue][] = $result; |
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} |
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} |
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return $dictionary; |
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} |
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/** |
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* Create a new instance of the relation from a base relation instance. |
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* |
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* @param \Korridor\LaravelHasManyMerged\HasManyMerged $relation |
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* @return static |
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*/ |
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public static function fromBaseRelation(Base $relation): static |
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{ |
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return new static( |
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$relation->getQuery(), |
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$relation->getParent(), |
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$relation->getQualifiedForeignKeyNames(), |
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(fn () => $this->localKey)->call($relation) |
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); |
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} |
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} |
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staudenmeir /
eloquent-has-many-deep
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