karlfranz
(Karlfranz3)
1
Hi,
I need to manage 2 synchronizes databases in my yii backend.
Each insert,update,delete need to be done in both databases.
I already declare my db in config\main.php like this.
'db'=>array(
'connectionString' => 'mysql:host=localhost;dbname=db_main',
'emulatePrepare' => true,
'username' => 'user',
'password' => 'user',
'charset' => 'utf8',
),
'db_backup'=>array(
'connectionString' => 'mysql:host=localhost;dbname=db_backup',
'emulatePrepare' => true,
'username' => 'user',
'password' => 'user',
'charset' => 'utf8',
'class' => 'CDbConnection'
),
Somebody have idea where to start, Models overrides, controller, …
I know some topic already speak how to use 2 databases to fetch data, but none speak about override insert,update,delete.
Thank you for help.
karlfranz
(Karlfranz3)
2
I found a solution to insert,delete,update in 2 database in same time.
Simply use MyActiveRecord instead of CActiveRecord.
config/main.php
'components'=>array(
...
'db'=>array(
'connectionString' => 'mysql:host=localhost;dbname=bd_main',
'emulatePrepare' => true,
'username' => 'user',
'password' => 'user',
'charset' => 'utf8',
),
'db2'=>array(
'connectionString' => 'mysql:host=localhost;dbname=bd_backup',
'emulatePrepare' => true,
'username' => 'user',
'password' => 'user',
'charset' => 'utf8',
'class' => 'CDbConnection' // DO NOT FORGET THIS!
),
...
)
And my MyActiveRecord.php class
<?php
// protected/components/MyActiveRecord.php
class MyActiveRecord extends CActiveRecord
{
private static $dbmssql = null;
protected static $cur_db = 'db';
public function getDbConnection()
{
if (self::$cur_db == 'db')
{
self::$cur_db = 'db2';
return parent::getDbConnection();
}
else
{
self::$cur_db = 'db';
return self::getDb2Connection();
}
}
public function getDb2Connection()
{
if (self::$dbmssql !== null)
return self::$dbmssql;
else
{
self::$dbmssql = Yii::app()->db2;
if (self::$dbmssql instanceof CDbConnection)
{
self::$dbmssql->setActive(true);
return self::$dbmssql;
}
else
throw new CDbException(Yii::t('yii','Active Record requires a "db" CDbConnection application component.'));
}
}
public function deleteByPk($pk,$condition='',$params=array())
{
parent::deleteByPk($pk,$condition,$params);
return parent::deleteByPk($pk,$condition,$params);
}
public function insert($attributes=null)
{
parent::insert($attributes);
return parent::insert($attributes);
}
public function updateByPk($pk,$attributes,$condition='',$params=array())
{
parent::updateByPk($pk,$attributes,$condition,$params);
return parent::updateByPk($pk,$attributes,$condition,$params);
}
}
?>
And what about a master/master replication of databases? Wouldn’t that be easier ? 
karlfranz
(Karlfranz3)
4
My final objective is synchronize 1 mysql database on local server and 1 mssql database on another server.
That’s why I didn’t choose to option database replication.
Insert/Delete/Update on bold servers.
Select on localhost.
