/**
* Deletes a model that was formerly related to this model.
* This performs a check to see if the model is at least not being used
* for the same type of relation by another model. Note that this is not
* safe by any means -- use on your own risk.
*
* @param Model $model
* @param RelationInfo $info
*/
protected function deleteFormerlyRelatedModel(Model $model, RelationInfo $info)
{
$class = $this->modelClass;
// To see if we can safely delete the child model, attempt to find a different
// model of the same type as the parent model, that has a relation to the child model.
// If one exists, it's still in use and should not be deleted.
/** @var Model $class */
$inUse = $class::whereHas($info->relationMethod(), function ($query) use($model, $info) {
/** @var \Illuminate\Database\Eloquent\Builder $query */
$query->where($info->model()->getTable() . '.' . $info->model()->getKeyName(), $model->id);
})->where($this->model->getTable() . '.' . $this->model->getKeyName(), '!=', $this->model->id)->count();
if ($inUse) {
return;
}
$model->delete();
}
