php - Yii1 使用第二个数据库连接访问模型类。多数据库连接

Question

我使用了多个数据库连接。

主文件

'components'=>array(
    'db'=>array(
        'connectionString' => 'mysql:host=localhost;dbname=testdrive',
        'emulatePrepare' => true,
        'username' => 'root',
        'password' => '',
        'charset' => 'utf8',
    ),
    'db2'=>array(
            'connectionString' => 'mysql:host=remotelocalhost;dbname=seconddb',
            'emulatePrepare' => true,
            'username' => 'root',
            'password' => '',
            'charset' => 'utf8',
            'class'=>'CDbConnection'
        ),
    ),
)

当模型类使用第二个数据库连接（远程数据库 - db2）记录不更新

请帮我解决这个问题。

模型类

class Modelclass extends CActiveRecord
{
    // model class code
}

Answer 1

Yii1中访问多个数据库连接

以下是步骤：

Step1：在 config/main.php 中创建数据库连接字符串

'components'=>array(
    'db2'=>array(
        'class'=>'CDbConnection',
        'connectionString' => 'mysql:host=RemoteHostIpAddress;dbname=Remote_DB_Name',
        'emulatePrepare' => true,
        'username' => 'Remote_DB_User_Name',
        'password' => 'Remote_DB_Password',
        'charset' => 'utf8',
        'enableParamLogging' => true,
    ),

    'db'=>array(
        'class'=>'CDbConnection',
        'connectionString' => 'mysql:host=localhost;dbname=DB_Name',
        'emulatePrepare' => true,
        'username' => 'DB_User_Name',
        'password' => 'DB_Password',
        'charset' => 'utf8',
        'enableParamLogging' => true,
    ),
)

Step2：在组件中创建新类以访问第二个数据库连接（db2）

class Db2ActiveRecord extends CActiveRecord
{
    public static $db2;

    public function getDbConnection()
    {

        if(self::$db2!==null)
            return self::$db2;
        else
        {
            self::$db2=Yii::app()->db2;
            self::$db2->connectionString;

            if(self::$db2 instanceof CDbConnection)
            {
                self::$db2->setActive(true);
                return self::$db2;
            }
            else{
                throw new CDbException(Yii::t('yii','Active Record requires a "db" CDbConnection application component.'));
            }

        }

    }
}

Step3：使用在组件中创建的类从第二个数据库扩展模型类

class Modelclass extends Db2ActiveRecord
{
    // model class code
}