'components' => [
 'db' => [
 'class' => 'yii\db\Connection',
 'dsn' => 'mysql:host=10.10.10.10;port=4005;dbname=wordpress',
 'username' => 'wp',
 'password' => '123',
 'charset' => 'utf8',
 ],

class ActiveRecord extends BaseActiveRecord {
 
/**
 * Returns the database connection used by this AR class.
 * By default, the "db" application component is used as the database connection.
 * You may override this method if you want to use a different database connection.
 * @return Connection the database connection used by this AR class.
 */
public static function getDb()
{
 return Yii::$app->getDb();
}

abstract class Application extends Module {
/**
 * Returns the database connection component.
 * @return \yii\db\Connection the database connection.
 */
public function getDb()
{
 return $this->get('db');
}

class OrderInfo extends \yii\db\ActiveRecord
{
 /**
 * @inheritdoc
 * @return
 */
 public static function tableName()
 {
 return 'order_info';
 }

class OrderInfo extends \yii\db\ActiveRecord
{
 private static $partitionIndex_ = null; // 分表ID
 
 /**
 * 重置分区id
 * @param unknown $uid
 */
 private static function resetPartitionIndex($uid = null) {
 $partitionCount = \Yii::$app->params['Order']['partitionCount'];
 
 self::$partitionIndex_ = $uid % $partitionCount;
 }
 
 /**
 * @inheritdoc
 */
 public static function tableName()
 {
 return 'order_info' . self::$partitionIndex_;
 }

class OrderInfo extends \yii\db\ActiveRecord {
 
private static $databaseIndex_ = null; // 分库ID
private static $partitionIndex_ = null; // 分表ID
 
 /**
 * 重置分区id
 * @param unknown $uid
 */
 private static function resetPartitionIndex($uid = null) {
 $databaseCount = \Yii::$app->params['Order']['databaseCount'];
 $partitionCount = \Yii::$app->params['Order']['partitionCount'];
 
 // 先决定分到哪一张表里
 self::$partitionIndex_ = $uid % $partitionCount;
 // 再根据表的下标决定分到哪个库里
 self::$databaseIndex_ = intval(self::$partitionIndex_ / ($partitionCount / $databaseCount));
 }
 
 /**
 * @inheritdoc
 */
 public static function tableName()
 {
 $database = 'wordpress' . self::$databaseIndex_;
 $table = 'order_info' . self::$partitionIndex_;
 return $database . '.' . $table;
 }

'db0' => [
 'class' => 'yii\db\Connection',
 'dsn' => 'mysql:host=10.10.10.10;port=6184;dbname=wordpress0',
 'username' => 'wp',
 'password' => '123',
 'charset' => 'utf8',
 // 'tablePrefix' => 'ktv_',
],
'db1' => [
 'class' => 'yii\db\Connection',
 'dsn' => 'mysql:host=10.10.10.11;port=6184;dbname=wordpress2',
 'username' => 'wp',
 'password' => '123',
 'charset' => 'utf8',
 // 'tablePrefix' => 'ktv_',
],
'db2' => [
 'class' => 'yii\db\Connection',
 'dsn' => 'mysql:host=10.10.10.12;port=6184;dbname=wordpress4',
 'username' => 'wp',
 'password' => '123',
 'charset' => 'utf8',
 // 'tablePrefix' => 'ktv_',
],
'db3' => [
 'class' => 'yii\db\Connection',
 'dsn' => 'mysql:host=10.10.10.13;port=6184;dbname=wordpress6',
 'username' => 'wp',
 'password' => '123',
 'charset' => 'utf8',
 // 'tablePrefix' => 'ktv_',
],

class OrderInfo extends \yii\db\ActiveRecord
{
 private static $databaseIndex_ = null; // 分库ID
 private static $partitionIndex_ = null; // 分表ID
 
 /**
 * 重置分区id
 * @param unknown $uid
 */
 private static function resetPartitionIndex($uid = null) {
 $databaseCount = \Yii::$app->params['Order']['databaseCount'];
 $partitionCount = \Yii::$app->params['Order']['partitionCount'];
 
 // 先决定分到哪一张表里
 
 self::$partitionIndex_ = $uid % $partitionCount;
 // 再根据表的下标决定分到哪个库里
 self::$databaseIndex_ = intval(self::$partitionIndex_ / ($partitionCount / $databaseCount));
 }
 
 /**
 * 根据分库分表,返回库名.表名
 */
 public static function tableName()
 {
 $database = 'wordpress' . self::$databaseIndex_;
 $table = 'order_info' . self::$partitionIndex_;
 return $database . '.' . $table;
 }
 
 /**
 * 根据分库结果,返回不同的数据库连接
 */
 public static function getDb()
 {
 return \Yii::$app->get('db' . self::$databaseIndex_);
 }