public function updating(\Illuminate\Database\Eloquent\Model $model)
{
// An node is being updated.
// Rebuild the tree if the parent was changed.
// Get column names.
// Missing required columns will throw an exception.
$pkColumn = $model->getKeyName();
$leftColumn = $model->getLeftColumn();
$rightColumn = $model->getRightColumn();
$parentColumn = $model->getParentColumn();
$depthColumn = $model->getDepthColumn();
$groupColumn = $model->getGroupColumn();
$originalParentId = $model->getOriginal($parentColumn);
if ($originalParentId !== $model->{$parentColumn}) {
$model->syncOriginalAttribute($parentColumn);
echo 'parent changed from "' . $originalParentId . '" to "' . $model->{$parentColumn} . '"';
if (!is_null($originalParentId)) {
// Load original parent
$originalParent = $model::findOrFail($originalParentId, array_filter([$pkColumn, $leftColumn, $rightColumn, $depthColumn, $groupColumn]));
}
if (!is_null($model->{$parentColumn})) {
// Load new parent
$newParent = $model::findOrFail($model->{$parentColumn}, array_filter([$pkColumn, $leftColumn, $rightColumn, $depthColumn, $groupColumn]));
if ($newParent->{$leftColumn} > $model->{$leftColumn} and $newParent->{$leftColumn} < $model->{$rightColumn}) {
// This change would create a circular tree.
throw new \Exception('Changing this node\'s parent to ' . $model->{$parentColumn} . ' creates a circular reference');
}
}
//$originalParent = $model->where
// @TODO: Move this to the Trait. Override save().
dd($modelId);
/*
SELECT id FROM node
WHERE node.left BETWEEN 1 AND 10
AND node.id = 8
*/
// Rebuild the entire tree.
// @TODO: Be smarter about this method.
dd($model);
$rootNode = $model::where($parentColumn, '=', null)->first();
$rootNode->buildTree();
}
return true;
}
