Yii2 ActiveRecord 缓存 [英] Yii2 ActiveRecord cache

问题描述

Yii 2 如何使用 ActiveRecotd 缓存?我没有在官方文档中找到任何示例.在 Google 中我找到了 2 个例子，第一个是:

How to use ActiveRecotd cache for Yii 2? I did't find any examples in official docs. In Google I found 2 examples, first is:

$db = self::getDb();
$object = $db->cache(function ($db) use($id) {
    return self::findOne($id);
});

但它不适用于 Model，我使用更新的框架进行了测试.另一个例子是:

But it doesn't work for Model, I tested with updated framework. Other example is:

$data = Yii::$app->cache->get('some_var_' . $id);
if ($data === false)
{
    $data = self::findOne($id);
    Yii::$app->cache->set('some_var_' . $id, $data, 60);
}

它工作正常，但它不是 ActiveRecord 缓存而是数据缓存，所以我们在 Yii 2 中没有 ActiveRecord 缓存?

It's working fine, but it's not ActiveRecord caching it's data caching, So we haven't got ActiveRecord caching in Yii 2?

推荐答案

1) 像这样使用缓存:

1) Use cache like that:

$db = Yii::$app->db;// or Category::getDb()
$result = $db->cache(function ($db) use ($id) {
    return Category::find()->where(['id' => $id])->all();
}, CACHE_TIMEOUT);

2) 如果你可以使用查询依赖，像这样使用:

2) If you may use query dependency, use like that:

$db = Yii::$app->db;// or Category::getDb()
$dep = new DbDependency();
$dep->sql = 'SELECT count(*) FROM category';
$result = $db->cache(function ($db) use ($id) {
    return Category::find()->where(['id' => $id])->all();
}, CACHE_TIMEOUT, $dep);

这篇关于Yii2 ActiveRecord 缓存的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！