迭代原则集合由某个字段排序 [英] Iterate Doctrine Collection ordered by some field

问题描述

我需要这样的：

        $products = Products::getTable()->find(274);
        foreach ($products->Categories->orderBy('title') as $category)
        {
            echo "{$category->title}<br />";
        }

我知道是不可能的，但...像这样不创建Doctrine_Query？

I know is it not possible, but... How can I do something like this without creating a Doctrine_Query?

谢谢。

推荐答案

只是看着同样的问题。你需要将Doctrine_Collection转换为一个数组：

I was just looking at the same problem. You need to convert the Doctrine_Collection into an array:

$someDbObject = Doctrine_Query::create()...;
$children = $someDbObject->Children;
$children = $children->getData(); // convert from Doctrine_Collection to array

然后可以创建自定义排序函数并调用它： p>

Then you can create a custom sort function and call it:

// sort children
usort($children, array(__CLASS__, 'compareChildren')); // fixed __CLASS__

其中compareChildren看起来像：

Where compareChildren looks something like:

private static function compareChildren($a, $b) {
   // in this case "label" is the name of the database column
   return strcmp($a->label, $b->label);
}

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