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Yii2-Redis使用小记

Jun 20, 2016 pm 12:25 PM

前些天简单学习了下 Redis,现在准备在项目上使用它了。我们目前用的是 Yii2 框架,在官网搜索了下 Redis,就发现了yii2-redis这扩展。

安装后使用超简单,打开 common/config/main.php 文件,修改如下。

文本

'cache' => [    // 'class' => 'yii\caching\FileCache',    'class' => 'yii\redis\Cache',],'redis' => [    'class' => 'yii\redis\Connection',    'hostname' => 'localhost',    'port' => 6379,    'database' => 0,],
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Copy after login
'cache' => [    // 'class' => 'yii\caching\FileCache',    'class' => 'yii\redis\Cache',],'redis' => [    'class' => 'yii\redis\Connection',    'hostname' => 'localhost',    'port' => 6379,    'database' => 0,],
Copy after login
Copy after login

OK,现在已经用 redis 接管了yii的缓存,缓存的使用和以前一样,以前怎么用现在还是怎么用,但是有个不算bug的bug,所以算小坑,等会会说。

来测试下 cache 先,

文本

Yii::$app->cache->set('test', 'hehe..');echo Yii::$app->cache->get('test'), "\n";Yii::$app->cache->set('test1', 'haha..', 5);echo '1 ', Yii::$app->cache->get('test1'), "\n";sleep(6);echo '2 ', Yii::$app->cache->get('test1'), "\n";
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Copy after login
Yii::$app->cache->set('test', 'hehe..');echo Yii::$app->cache->get('test'), "\n";Yii::$app->cache->set('test1', 'haha..', 5);echo '1 ', Yii::$app->cache->get('test1'), "\n";sleep(6);echo '2 ', Yii::$app->cache->get('test1'), "\n";
Copy after login
Copy after login

来看下测试结果。

和原来一样的用法,没问题。。

但是刚才我说过了有个不算bug的bug,所以算小坑,到底是什么东西呢?

如果你直接用 redis 接管了 cache,如果正常使用是完全没问题的,但是当 过期时间 的值超过 int 范围的时候,redis就会报错。

我使用了 yii2-admin,凑巧让我踩到坑了,因为他缓存了30天,也就是2592000秒,并且 redis 缓存时间精度默认用毫秒,所以时间就是 2592000000 毫秒。

而 redis 的过期时间只能是int类型,Cache.php 里的 php 强制转为int,而没有做其他处理,所以就会变成 -1702967296 然后就报错了。

但是直接在 redis 命令行下不会负数,如图。

不过没关系,修复起来也很简单,我们修改为秒即可。

打开 vendor/yiisoft/yii2-redis/Cache.php

133

行,修改为如下代码。

文本

protected function setValue($key, $value, $expire){    if ($expire == 0) {        return (bool) $this->redis->executeCommand('SET', [$key, $value]);    } else {        // $expire = (int) ($expire * 1000); // 单位默认为毫秒        // return (bool) $this->redis->executeCommand('SET', [$key, $value, 'PX', $expire]);        $expire = +$expire > 0 ? $expire : 0; // 防止负数        return (bool) $this->redis->executeCommand('SET', [$key, $value, 'EX', $expire]); // 按秒缓存    }}
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Copy after login
protected function setValue($key, $value, $expire){    if ($expire == 0) {        return (bool) $this->redis->executeCommand('SET', [$key, $value]);    } else {        // $expire = (int) ($expire * 1000); // 单位默认为毫秒        // return (bool) $this->redis->executeCommand('SET', [$key, $value, 'PX', $expire]);        $expire = +$expire > 0 ? $expire : 0; // 防止负数        return (bool) $this->redis->executeCommand('SET', [$key, $value, 'EX', $expire]); // 按秒缓存    }}
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Copy after login

这样就OK了。

好了,今天分享这些。

在Yii2中使用Pjax导致Yii2内联脚本载入失败的问题 http://www.linuxidc.com/Linux/2016-03/128949.htm

Yii2 实现修改密码功能 http://www.linuxidc.com/Linux/2015-07/120137.htm

Yii 用户登陆机制 http://www.linuxidc.com/Linux/2015-01/111602.htm

Yii中引入js和css文件 http://www.linuxidc.com/Linux/2015-01/111603.htm

Yii 不完全解决方案 http://www.linuxidc.com/Linux/2015-01/111606.htm

Yii CGridView 基本使用 http://www.linuxidc.com/Linux/2015-01/111607.htm

Yii框架分布式缓存的实现方案 http://www.linuxidc.com/Linux/2015-02/113828.htm

Yii 的详细介绍 : 请点这里

Yii 的下载地址 : 请点这里

本文永久更新链接地址 : http://www.linuxidc.com/Linux/2016-06/132347.htm

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