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<?php |
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namespace Iatstuti\Database\Support; |
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use Illuminate\Database\Eloquent\Relations\Relation; |
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use LogicException; |
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trait CascadeSoftDeletes |
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{ |
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/** |
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* Boot the trait. |
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* |
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* Listen for the deleting event of a soft deleting model, and run |
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* the delete operation for any configured relationship methods. |
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* |
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* @throws \LogicException |
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*/ |
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protected static function bootCascadeSoftDeletes() |
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{ |
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static::deleting(function ($model) { |
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if (! $model->implementsSoftDeletes()) { |
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throw new LogicException(sprintf( |
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'%s does not implement Illuminate\Database\Eloquent\SoftDeletes', |
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get_called_class() |
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)); |
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} |
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if ($invalidCascadingRelationships = $model->hasInvalidCascadingRelationships()) { |
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throw new LogicException(sprintf( |
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'%s [%s] must exist and return an object of type Illuminate\Database\Eloquent\Relations\Relation', |
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str_plural('Relationship', count($invalidCascadingRelationships)), |
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join(', ', $invalidCascadingRelationships) |
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)); |
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} |
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foreach ($model->getCascadingDeletes() as $relationship) { |
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$model->{$relationship}()->delete(); |
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} |
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}); |
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} |
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/** |
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* Determine if the current model implements soft deletes. |
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* |
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* @return bool |
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*/ |
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protected function implementsSoftDeletes() |
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{ |
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return in_array('Illuminate\Database\Eloquent\SoftDeletes', $this->getClassTraits($this)); |
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} |
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/** |
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* Get all traits used by class, including those inherited from ancestor classes. |
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* |
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* @param $class |
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* @param bool $autoload |
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* |
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* @return array |
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*/ |
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protected function getClassTraits($class, $autoload = true) { |
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$traits = []; |
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do { |
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$traits = array_merge(class_uses($class, $autoload), $traits); |
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} while($class = get_parent_class($class)); |
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foreach ($traits as $trait => $same) { |
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$traits = array_merge(class_uses($trait, $autoload), $traits); |
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} |
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return array_unique($traits); |
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} |
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/** |
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* Determine if the current model has any invalid cascading relationships defined. |
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* |
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* A relationship is considered invalid when the method does not exist, or the relationship |
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* method does not return an instance of Illuminate\Database\Eloquent\Relations\Relation. |
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* |
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* @return array |
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*/ |
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protected function hasInvalidCascadingRelationships() |
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{ |
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return array_filter($this->getCascadingDeletes(), function ($relationship) { |
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return ! method_exists($this, $relationship) || ! $this->{$relationship}() instanceof Relation; |
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}); |
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} |
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/** |
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* Fetch the defined cascading soft deletes for this model. |
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* |
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* @return array |
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*/ |
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protected function getCascadingDeletes() |
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{ |
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return isset($this->cascadeDeletes) ? (array) $this->cascadeDeletes : []; |
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} |
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} |
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michaeldyrynda /
laravel-cascade-soft-deletes
