鉴于您在上面的评论并假设您对数据库进行了正确的复制设置。
解决方案 ：-
- 步骤1：
在文件中
应用程序/etc/config.xml
找到“core_read”结束标签
<resources>
....
<core_read>
<connection>
<use>default_read</use>
</connection>
</core_read>
....
</resources>
添加在结束标记之后（与您要使用的数据库一样多），它应该如下所示：
<resources>
....
<core_read>
<connection>
<use>default_read</use>
</connection>
</core_read>
<slave_db_1>
<connection>
<use>slave_one_db</use>
</connection>
</slave_db_1>
<slave_db_2>
<connection>
<use>slave_two_db</use>
</connection>
</slave_db_2>
....
</resources>
- 第2步：
并在您的 apt/etc/local.xml 之后（“/default_setup>”结束标记）添加新连接
<resources>
....
<slave_one_db>
<connection>
<host><![CDATA[localhost]]></host>
<username><![CDATA[slave_one_db_user]]></username>
<password><![CDATA[slave_one_db_password]]></password>
<dbname><![CDATA[slave_db_one_name]]></dbname>
<initStatements><![CDATA[SET NAMES utf8]]></initStatements>
<model><![CDATA[mysql4]]></model>
<type><![CDATA[pdo_mysql]]></type>
<pdoType><![CDATA[]]></pdoType>
<active>1</active>
</connection>
</slave_one_db>
<slave_two_db>
<connection>
<host><![CDATA[localhost]]></host>
<username><![CDATA[slave_tow_db_user]]></username>
<password><![CDATA[slave_tow_db_password]]></password>
<dbname><![CDATA[slave_db_one_tow]]></dbname>
<initStatements><![CDATA[SET NAMES utf8]]></initStatements>
<model><![CDATA[mysql4]]></model>
<type><![CDATA[pdo_mysql]]></type>
<pdoType><![CDATA[]]></pdoType>
<active>1</active>
</connection>
</slave_two_db>
....
</resources>
- 第 3 步：
从“app/code/core/Mage/Core/Model/Resource.php”复制文件 == TO ==>“app/code/local/Mage/Core/Model/Resource.php”
1- 查找受保护的 $_mappedTableNames；
2-在下面添加此方法：
public function getSlaveDb()
{
$prefix = 'slave_db_'; // prefix for the slaves databased in the xml file
$cookieExpireTime = 1209600; // 2 weeks Cookie ( database selection ) expire time
$dbArray = array(1,2); // All slaves Db in-case the cookie has invalid value
$slaveDb = array_rand( array_flip($dbArray),1 ); // How to alternate between databases ( in this demo i just use 2 database ) adjust the selection of the database to fit hoe many database you want to use !
if(!isset($_COOKIE['read_db']) || !in_array($_COOKIE['read_db'],$dbArray)) // Check for the cookie values
{
setcookie("read_db", $slaveDb, time()+$cookieExpireTime); // set the current database to the user in cookie so next time user use same connection to database ! to avoid jumping or hopping on different databases in short time
}else{
$slaveDb = $_COOKIE['read_db']; // return the database selected if the user has it in the cookies
}
return $prefix.$slaveDb;
}
3- 将方法“public function getConnection($name)”修改为如下所示：
public function getConnection($name)
{
if($name =='core_read') // Only applied for READ Connections !!!
{
$name = $this->getSlaveDb(); // change the name of the connection to the one we get from our main method
}
//....... Leave the rest of the function as it is !!
}
这将允许您使用您在 XML 和 PHP 代码中为 core_read 连接指定的数据库以及为 magento 中的所有其他连接指定的 default_setup 连接（ core_write，core_setup ）
希望这能解决您的问题。