Magento 1.7.2 - Add custom field at Admin, Sales, Order

Question

I'm following this tutorial: http://www.excellencemagentoblog.com/magento-create-custom-payment-method. At the end of step 2, I should see my field on Admin=>Sales=>Order but I can't see anything.

In sales_flat_quote_payment I can see the telefono_no field, and in sales_flat_order_payment too. When I buy something, Magento saves the phone data telefono_no in database. Anyway, my mysql4-install-0.1.0.php is:

$install = $this;
$install->startSetup();

$install->run("
    ALTER TABLE `".$install->getTable('sales/quote_payment')."` ADD `telefono_no` VARCHAR(7) NOT NULL DEFAULT '0000000';
    ALTER TABLE `".$install->getTable('sales/order_payment')."` ADD `telefono_no` VARCHAR(7) NOT NULL DEFAULT '0000000';
");

$install->endSetup();

And in my config.xml I have:

<?xml version="1.0"?>
<config>
    <modules>
        <Xs_Pago>
            <version>0.1.0</version>
        </Xs_Pago>
    </modules>
    <global>
        <fieldsets>
            <sales_convert_quote_payment>
                <telefono_no>
                    <to_order_payment>*</to_order_payment>
                </telefono_no>
            </sales_convert_quote_payment>
        </fieldsets>
    </global>
</config>

Answer 1

The code about should only add the fields to the db and copy the value from quote_payment to order_payment when an order is place.

The code will not display any info, the reason the info is display in the example you refer is because of Mage_Payment_Block_Info

<?php
class Excellence_Pay_Block_Info_Pay extends Mage_Payment_Block_Info
{
    protected function _prepareSpecificInformation($transport = null)
    {
        if (null !== $this->_paymentSpecificInformation) {
            return $this->_paymentSpecificInformation;
        }
        $info = $this->getInfo();
        $transport = new Varien_Object();
        $transport = parent::_prepareSpecificInformation($transport);
        $transport->addData(array(
            Mage::helper('payment')->__('Check No#') => $info->getCheckNo(),
            Mage::helper('payment')->__('Check Date') => $info->getCheckDate()
        ));
        return $transport;
    }
}

Take a look @ Magento custom "order" attribute / admin input and display