Bundle product email template

Question

<sales_email_order_items>
    <block type="sales/order_email_items" name="items" template="email/order/items.phtml">
        <action method="addItemRender"><type>default</type><block>sales/order_email_items_order_default</block><template>email/order/items/order/default.phtml</template></action>
        <action method="addItemRender"><type>grouped</type><block>sales/order_email_items_order_grouped</block><template>email/order/items/order/default.phtml</template></action>
        <block type="sales/order_totals" name="order_totals" template="sales/order/totals.phtml">
            <action method="setLabelProperties"><value>colspan="3" align="right" style="padding:3px 9px"</value></action>
            <action method="setValueProperties"><value>align="right" style="padding:3px 9px"</value></action>
            <block type="tax/sales_order_tax" name="tax" template="tax/order/tax.phtml">
                <action method="setIsPlaneMode"><value>1</value></action>
            </block>
        </block>
    </block>
    <block type="core/text_list" name="additional.product.info" />
</sales_email_order_items>

While searching for the email templates for an order I found this block of the XML file. It clearly specifies which template files are used. My question is for product type default one can easily find the template file by seeing the addItemRender method and type=default.

But for product type="grouped" the template file that is shown is /email/order/items/order/default.phtml but in actual /bundle/email/order/items/order/default.phtml is the template file. It will sound silly but any one could let me know why the bundle is not specified in the template path hint, if it is understood by default then how?

And also blocks sales/order_email_items_order_grouped and this sales/order_email_items_order_default where I could find them and what is their use.

Answer 1

Block blocks sales/order_email_items_order_grouped you can find it from

app\code\core\Mage\Sales\Block\Order\Email\Items\Order\Grouped.php and the block

sales/order_email_items_order_default you can find it from

app\code\core\Mage\Sales\Block\Order\Email\Items\Order\Default.php both block provides the valid methods for

app\design\frontend\YOUR_VENDOR\YOUR_THEME\template\email\order\items\order\default.phtml

For example in this default.phtml you an find the <?php if ($this->getItemOptions()): ?> and the implementation of this method is in Default.php