Yii框架实现多数据库配置和操作的方法

//cms DB connection
'db' => (defined('DB_CONNECTION') ? array(
  'connectionString' => DB_CONNECTION,
  'username' => DB_USER,
  'password' => DB_PWD,
  'charset' => 'utf8',
  'emulatePrepare' => true,
  'enableParamLogging' => true,
  'schemaCachingDuration' => 3600, //cache table schema
    ) : array()),
//member DB connection
'db_member' => (defined('DB_CONNECTION_MEMBER') ? array(
  'class'=> 'CDbConnection' ,
  'connectionString' => DB_CONNECTION_MEMBER,
  'username' => DB_USER_MEMBER,
  'password' => DB_PWD_MEMBER,
  'charset' => 'utf8',
  'emulatePrepare' => true,
  'enableParamLogging' => true,
  'schemaCachingDuration' => 3600, //cache table schema
    ) : array()),

class Point extends CActiveRecord {
  public function getDbConnection() {
     return Yii::app()->db_member;
  }
  ...
}