tree behavior sorting

Hey guys,

I am using the tree behavior (first time) and got a question about
sorting.

I am using it for a multilevel menu system with drag&drop sortables.

Everything works very nicely, but can't figure one thing out. When I
sort items on the same level the parent_id doesn't change and the tree
structure doesn't get updated.

The solution I use now, is by setting the parent_id to NULL and back
again. See below.

$this->MenuItem->saveField('parent_id', 'NULL', false);
$this->MenuItem->saveField('parent_id', $parentId, false);

Is this the way to bypass this behaviour or are there better ways to
do this?

Thanks,
Adriaan

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