本文介绍了在单一查询中如何使用原则获取整个树?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
此代码段来自按预期工作:
This snippet from official website works as expected:
$treeObject = Doctrine::getTable('Category')->getTree();
$rootColumnName = $treeObject->getAttribute('rootColumnName');
foreach ($treeObject->fetchRoots() as $root) {
$options = array(
'root_id' => $root->$rootColumnName
);
foreach($treeObject->fetchTree($options) as $node) {
echo str_repeat(' ', $node['level']) . $node['name'] . "\n";
}
}
但是我看到有数十个查询发送到数据库
But I see there are dozens of queries sent to database.
如何做到这一点?
推荐答案
尝试这样:
Doctrine_Core::getTable('YourTableWithTree')->createQuery('tree')
->addOrderBy('tree.root_id ASC')
->addOrderBy('tree.lft ASC');
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