protected function SavePersonForceUpdate($strFormId, $strControlId, $strParameter)
{
if ($strParameter == '1') {
$objPerson = $this->objPerson1;
$objPerson->FirstName = $this->txtFirstName1->Text;
$objPerson->LastName = $this->txtLastName1->Text;
} else {
$objPerson = $this->objPerson2;
$objPerson->FirstName = $this->txtFirstName2->Text;
$objPerson->LastName = $this->txtLastName2->Text;
}
// Do the Save, Forcing the Update
$objPerson->Save(false, true);
// Reload the Person so that it's fresh
if ($strParameter == '1') {
$this->objPerson1 = PersonWithLock::Load(5);
} else {
$this->objPerson2 = PersonWithLock::Load(5);
}
}
_p(QApplication::$ScriptName);
?>
">
<p>Saving a Single Object will perform the save normally<br />
<input type="submit" id="single" name="single" value="Save 1 Object"/></p>
<p>Attempting to save a Two Instances of the Same Object will throw an <strong>Optimistic Locking Exception</strong><br />
<input type="submit" id="double" name="double" value="Save 2 Objects (same Instance)"/></p>
<p>Using <strong>$blnForceUpdate</strong> to avoid the <strong>Optimistic Locking Exception</strong><br/>
<input type="submit" id="double_force" name="double_force" value="Force Update Second Object"/></p>
</form>
<?php
// Load the Two Person objects (same instance -- let them both be Person ID #4)
$objPerson1 = PersonWithLock::Load(5);
$objPerson2 = PersonWithLock::Load(5);
// Some RDBMS Vendors' TIMESTAMP is only precise to the second
// Let's force a delay to the next second to ensure timestamp functionality
// Note: on most web applications, because Optimistic Locking are more application user-
// level constraints instead of systematic ones, this delay is inherit with the web
// application paradigm. The following delay is just to simulate that paradigm.
$dttNow = new QDateTime(QDateTime::Now);
while ($objPerson1->SysTimestamp == $dttNow->qFormat(QDateTime::FormatIso)) {
$dttNow = new QDateTime(QDateTime::Now);
}
// Make Changes to the Object so that the Save Will Update Something
if ($objPerson1->FirstName == 'Al') {
$objPerson1->FirstName = 'Alfred';
$objPerson2->FirstName = 'Al';
} else {
$objPerson1->FirstName = 'Al';
