1. Requirements
2. Usage

This helper class ensures a transaction to occure without error. Put your code within a transaction without worrying where the transaction started. If method mA() of Class A start a transaction and another method mB() of Class B also starts a transaction and call the mA() method, an error will occur transaction already started. With this helper you don't have to worry about this.

Requirements ¶

Yii 1.1

Usage ¶

Let say thers is

Class A
{
  public function mA()
  {
    Yii::app()->db->beginTransaction();
    ..
    ..
    Yii::app()->db->currentTransaction->commit();
  }
}

AND

Class B
{
  public function mB()
  {
    $a=new A();
    Yii::app()->db->beginTransaction();
    ..
    ..
    $a->mA(); //error occured
    ..
    ..
    Yii::app()->db->currentTransaction->commit();
  }
}

with TransactionHelper write the above code like below :

Class A
{
  public function mA()
  {
    $trans_key=TransactionHelper::beginTransaction();
    ..
    ..
    TransactionHelper::commit($trans_key);
  }
}

Class B
{
  public function mB()
  {
    $a=new A();
    $trans_key=TransactionHelper::beginTransaction();
    ..
    ..
    $a->mA(); //no error , transaction will not commit here
    ..
    ..
    TransactionHelper::commit($trans_key);
  }
}

Just put the TransactionHelper.php anywhere in your code.load it. Use it.