Magento getEvent()->getOrder empty - class

Question

I'm trying to get an Observer working to see if a payment has been made via check/cheque, I know the Observer is being used as I have a log record to show. However when I try to access the Order it is either empty or will not print to the log file.
app/etc/modules/Foo_Bar.xml
<?xml version="1.0"?>
<config>
<modules>
<Foo_Bar>
<active>true</active>
<codePool>local</codePool>
</Foo_Bar>
</modules>
</config>
app/code/local/Foo/Bar/etc/config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<config>
<global>
<models>
<foo_bar>
<class>Foo_Bar_Model</class>
</foo_bar>
</models>
<events>
<sales_order_payment_place_end> <!-- event -->
<observers>
<foo_bar> <!-- unique for event -->
<!-- type: singleton | disable | model -->
<class>foo_bar/observer</class>
<method>SalesOrderPaymentPlaceEnd</method>
</foo_bar>
</observers>
</sales_order_payment_place_end>
</events>
</global>
</config>
app/code/local/Foo/Bar/Model/Observer.php
<?php
class Foo_Bar_Model_Observer
{
public function SalesOrderPaymentPlaceEnd(Varien_Event_Observer $observer)
{
Mage::log('Location: SalesOrderPaymentPlaceEnd');
$order = $observer->getEvent()->getOrder();
Mage::log('order: '.$order);
}
}
The first log works as expected, however I'm sure getOrder() isn't working as my second log entry just prints 'order: '.
Thanks

Answer 1

#James has already commented this..I am explaning
The event "sales_order_payment_place_end" located in "app\code\core\Mage\Sales\Model\Order\Payment.php" .
The event have only one parameter that is Payment. So
$order = $observer->getEvent()->getOrder();
will not work. You need to use
$orderPayment = $observer->getEvent()->getPayment();

Answer 2

What worked for me was below:
public function autoInvoiceForOfflinePayment(Varien_Event_Observer $observer)
{
$order = $observer->getEvent()->getPayment()->getOrder();
// In my case I was trying to get the payment method code, e.g.
$order->getPayment()->getMethodInstance()->getCode()
}
I hope this helps (Magento EE 1.14.2)
What I discovered, which I forget and often discover again when creating a hook is to look at the line in the file dispatching the event:
e.g. "app\code\core\Mage\Sales\Model\Order\Payment.php"
Mage::dispatchEvent('sales_order_payment_place_end', array('payment' => $this));
So you want to get the event first, then in the array the payment variable:
$order = $observer->getEvent()->getPayment();
From there you can get any public functions in that file, the same principle seems to apply throughout.