Introduction
Basic using Transaction
The problem with method saveMany()
Solution
References

1.Introduction

This is my first Tutorial, I would like to talk about using transaction with saveMany() method of Model Object in CakePHP.

2.Basic using Transaction

With CakePHP, using transaction is easy with following simple lines:

Item

// Getting DataSouce
$dataSource = $this->getDataSource();

// Starting transaction
$dataSource->begin();

// do something and save data to talbe
......................

To commit transaction on success

dataSource->commit();

Or rollback transaction on failure

$dataSource->rollback();

It works well when is used with methods: save, saveAll.

3.The problem with method saveMany()

But may be you will spend much time to debug and find problem because transaction seem doesn't work with saveMany() method of Model Object

I was surprised and spent too much time to understand why transaction didn't work with following code block. Although I started transaction, but data is always written to database whether $successFlag is true or false.

Item

// Getting DataSouce
$dataSource = $this->getDataSource();

// Starting transaction
$dataSource->begin();

// Perform some tasks
$items = array();

foreach ($postedData as $row) {
$items[] = array(
                    'name'     => $row['name'],
                    'quantity' => $row['quantity'],
                    // something else ...
                );
} // End foreach


$this->create();
$this->saveMany($items);

$successFlag = doSomething();

if ($successFlag) {
dataSource->commit();
} else {
$dataSource->rollback();
}

4.Solution

To resolve problem, we must change this line

$this->saveMany($items);

↓

$this->saveMany($items, array('atomic' => false));

5.References

To get more detail : http://book.cakephp.org/2.0/en/models/saving-your-data.html#model-savemany-array-data-null-array-options-array

Thank you for reading and happy coding day.