Zend framework $db->update result

Question

Zend_Db_Adapter::update() returns the number of rows affected by the update operation. What is best way to determine if the query was successful?

Answer 1

If you are just looking for a boolean return value, this solution is the best for handling success in the model:

class Default_Model_Test extends Zend_Db_Table {

public function updateTest($testId, $testData){

    try {

        $this->_db->update('test', $testData, array(
            'id = ?'        => $testId
        ));

        return true;

    }
    catch (Exception $exception){

        return false;

    }

}

}

But, a better solution would be to handling success from the controller level, because it is making the request:

class Default_Model_Test extends Zend_Db_Table {

    public function updateTest($testId, $testData){

        $this->_db->update('test', $testData, array(
            'id = ?'        => $testId
        ));

    }

}

class Default_TestController extends Zend_Controller_Action {

    public function updateAction(){

        try {

            $testId = $this->_request->getParam('testId');
            if (empty($testId)) throw new Zend_Argument_Exception('testId is empty');

            $testData = $this->_request->getPost();
            if (empty($testId)) throw new Zend_Argument_Exception('testData is empty');

            $testModel->updateTest($testId, $testData);

        }
        catch (Exception $exception){

            switch (get_class($exception)){

                case 'Zend_Argument_Exception': $message = 'Argument error.'; break;
                case 'Zend_Db_Statement_Exception': $message = 'Database error.'; break;
                case default: $message = 'Unknown error.'; break;

            }

        }

    }

}

This is an excellent solution when working with multiple resource types, using a switch on the exception type, and doing what is appropriate based on your program's needs. Nothing can escape this vacuum.

Answer 2

Maybe:

$data = array(
    'updated_on'      => '2007-03-23',

    'bug_status'      => 'FIXED'
);
$result = $db->update('bugs', $data, 'bug_id = 2');
if ($result < $numRows) {//pass in numRows as method arg or hardcode integer.
    //handle error
} else {
    return TRUE;
}

Try something like this with the idea being you want to verify that the number of records you wanted updated got updated.

Answer 3

$data = array(
    'updated_on' => '2007-03-23',
    'bug_status' => 'FIXED',
);
$n = 0;
try {
    $n = $db->update('bugs', $data, 'bug_id = 2');
} catch (Zend_Exception $e) {
    die('Something went wrong: ' . $e->getMessage());
}
if (empty($n)) {
    die('Zero rows affected');
}