How to get the order_id from an observer

Question

I tried to get the order_id from an observer

here is my observer

 public function adminhtmlWidgetContainerHtmlBefore($observer) {
        if ($block instanceof Mage_Adminhtml_Block_Sales_Order_View) {
            var_dump($this->getOrderId());
            $block->addButton('do_something_crazy', array(
                'label'     => Mage::helper('sales')->__('Print Sticker'),
                    'onclick'   => 'setLocation(\'' . $this->getPrintStickerUrl() . '\')',
                    'class'     => 'go'
            ));           
        }
    }

I got this error:

Call to undefined method Company_extention_Model_Observer::getOrderId(). I tried too $order = $observer->getEvent()->getObject();

but nothing,

Could you help me?

thanks

Answer 1

The $observer variable contains all the information and methods you need. You were on the right track with $observer->getEvent(), but from there you must figure out what variables are stored in the event and access them appropriately.

A quick grep shows that the event is triggered in Mage_Adminhtml_Block_Widget_Container with the line: Mage::dispatchEvent('adminhtml_widget_container_html_before', array('block' => $this));, so you can access that variable with getBlock(). Now after checking that the block type is the one you want, you can call getOrder() on the Mage_Adminhtml_Block_Sales_Order_View object.

Your method should look something like this:

public function adminhtmlWidgetContainerHtmlBefore($observer) {
  $block = $observer->getEvent()->getBlock();
  if ($block instanceof Mage_Adminhtml_Block_Sales_Order_View) {
    $order = $block->getOrder();
    $block->addButton('do_something_crazy', array('label' => Mage::helper('sales')->__('Print Sticker'), 'onclick' => 'setLocation(\'' . $this->getPrintStickerUrl() . '\')', 'class' => 'go'));
  }
}

Answer 2

It can better idea to use class match and

Issue: wrong object:

$this mean current class object and but you need Mage_Adminhtml_Block_Sales_Order_View class object .As per $block is object of this Mage_Adminhtml_Block_Sales_Order_View.

$this->getOrderId() should be $block->getOrdeId();

The function getOrderId() is exits in that class but it is given null value henever this does not have value.

for getting Sale model object then try this $block=$block->getOrder();

Then you can use

get_class($block)==Mage_Adminhtml_Block_Sales_Order_View

instead of

$block instanceof Mage_Adminhtml_Block_Sales_Order_View