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<?php |
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namespace Staudenmeir\LaravelAdjacencyList\Eloquent\Relations\Graph\Traits; |
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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\Eloquent\Model; |
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use Illuminate\Database\Query\Expression; |
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trait IsRecursiveRelation |
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{ |
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/** |
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* Whether to include the parent model. |
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* |
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* @var bool |
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*/ |
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protected bool $andSelf; |
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/** |
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* Create a new recursive pivot relationship instance. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @param \Illuminate\Database\Eloquent\Model $parent |
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* @param string $table |
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* @param string $foreignPivotKey |
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* @param string $relatedPivotKey |
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* @param string $parentKey |
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* @param string $relatedKey |
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* @param bool $andSelf |
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* @return void |
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*/ |
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public function __construct( |
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Builder $query, |
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Model $parent, |
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string $table, |
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string $foreignPivotKey, |
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string $relatedPivotKey, |
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string $parentKey, |
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string $relatedKey, |
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bool $andSelf |
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) { |
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$this->andSelf = $andSelf; |
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parent::__construct($query, $parent, $table, $foreignPivotKey, $relatedPivotKey, $parentKey, $relatedKey); |
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} |
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/** |
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* Add the recursive expression for an eager load of the relation. |
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* |
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* @param array $models |
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* @param string $column |
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* @return void |
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*/ |
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protected function addEagerExpression(array $models, string $column): void |
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{ |
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$whereIn = $this->whereInMethod($this->parent, $this->parentKey); |
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$keys = $this->getKeys($models, $this->parentKey); |
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$constraint = function (Builder $query) use ($whereIn, $column, $keys) { |
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$query->$whereIn($column, $keys); |
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}; |
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$supportsUnion = $this->query->getExpressionGrammar()->supportsUnionInRecursiveExpression(); |
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$union = $this->andSelf || !$supportsUnion ? 'unionAll' : 'union'; |
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if (!$supportsUnion) { |
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$this->query->getQuery()->distinct(); |
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} |
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$this->addExpression($constraint, null, null, $union); |
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} |
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/** |
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* Build model dictionary. |
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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 buildDictionary(Collection $results) |
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{ |
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return $results->mapToDictionary(function (Model $result) { |
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return [$result->getFirstPathSegment() => $result]; |
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})->all(); |
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} |
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/** |
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* Handle dynamic method calls to the relationship. |
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* |
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* @param string $method |
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* @param array $parameters |
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* @return mixed |
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*/ |
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public function __call($method, $parameters) |
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{ |
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$methods = ['update', 'increment', 'decrement', 'delete', 'forceDelete']; |
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if (in_array($method, $methods)) { |
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$expression = $this->query->getQuery()->from; |
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$table = $this->parent->getTable(); |
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$this->query->getQuery()->from = $table; |
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$this->query->getModel()->setTable($table); |
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$keys = $this->query->getQuery()->newQuery()->from($expression)->select($this->parentKey); |
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return $this->query->whereIn($this->parentKey, $keys)->$method(...$parameters); |
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} |
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return parent::__call($method, $parameters); |
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} |
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/** |
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* Replace table hash with expression name in self-relation aggregate queries. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @param \Illuminate\Database\Query\Expression $expression |
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* @return \Illuminate\Database\Query\Expression |
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*/ |
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protected function replaceTableHash(Builder $query, Expression $expression): Expression |
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{ |
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return new Expression( |
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str_replace( |
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$query->getGrammar()->wrap( |
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$this->getRelationCountHash(false) |
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), |
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$query->getGrammar()->wrap( |
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$query->getModel()->getExpressionName() |
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), |
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$expression->getValue( |
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$query->getGrammar() |
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) |
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) |
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); |
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} |
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/** |
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* Get the select columns for the relation query. |
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* |
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* @param array $columns |
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* @return array |
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*/ |
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protected function shouldSelect(array $columns = ['*']) |
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{ |
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return $columns; |
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} |
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} |
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staudenmeir /
laravel-adjacency-list
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