Finding a subtree in a CakePHP Tree
In CakePHP, how do you select just a subtree in a model which actsAs
tree?
I tried this, to find the tree headed by the item with label = "My Label"
$this->find("threaded", array(
"conditions" => array(
"label" => "My Label"
)
));
...however looking at the logs, it runs this SQL:
SELECT Menu.id, Menu.parent_id, Menu.lft, Menu.rght, Menu.l开发者_StackOverflow社区abel, Menu.link
FROM menus Menu
WHERE label = 'My Label'
Which obviously only selects the one node, and not all its children.
It seems you will have to do it in two steps like this (from the manual):
$parent = $this->Category->find('first', array(
'conditions' => array('label' => 'My label')
));
$parentAndChildren = $this->Category->find('threaded', array(
'conditions' => array(
'Category.lft >=' => $parent['Category']['lft'],
'Category.rght <=' => $parent['Category']['rght']
)
));
You can't use the 'label' => 'my label'
condition in the threaded
call, since it would only find results that match that condition, parents and children. 'threaded'
only rearranges the results of a normal find operation based on the parent_id
, so you'll have to supply your own condition of what "children" are by using the lft
/rght
columns.
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