Error setting an adminhtml from a frontend path

Question

I'm using a third-party which set an appendPaymentBlock Observer method

<adminhtml>
    <events>
        <payment_info_block_prepare_specific_information>
            <observers>
                <realex_payment_information>
                    <type>singleton</type>
                    <class>realex/observer</class>
                    <method>appendPaymentBlock</method>
                </realex_payment_information>
            </observers>
        </payment_info_block_prepare_specific_information>
        ...
    </events>
    ...
</adminhtml>

Basically, this method set a template:

public function appendPaymentBlock(Varien_Event_Observer $observer)
{
    ...

    $paymentInfoBlock
        ->setPayment($payment)
        ->setPaymentInfo($paymentData)
        ->setTemplate('realex/payment/info/payment-info.phtml');

    $block->append($paymentInfoBlock);
}

payment-info.phtml script is at app/design/adminhtml/default/default/template/ path.

This is causing me the following critical error:

CRIT (2): Not valid template file:frontend/base/default/template/realex/payment/info/payment-info.phtml

How I can get this template from adminhtml and not from frontend folder?

Answer 1

Most likely the $paymentInfoBlock class extends Mage_Core_Block_Template and not Mage_Adminhtml_Block_Template.

Specifically to your extension, replacing

$blockType = 'core/template';

with

$blockType = 'adminhtml/template'; should do the trick.