I have created couple of custom fields in Magento's customer addresses using a tutorial available here.
When a customer edits his/her address the fields are shown, when he is checking out through the one page checkout being logged in, the addresses appear as a drop down. In this case the address is hidden from the client using a display:none; style.
The problem is that the custom address attributes are not available but the regular attributes are available.
What I think is that when the customer is editing the address, the controller is customer and when he is on onepage the controller is checkout. There is some error or I am missing something so that the onepage controller fails to pull custom address fields.
What I have done:
I have overridden the billing.phtml file in
/app/design/frontend/base/default/template/checkout/onepage
The fields show up in the onepage checkout billing section. But when the system is loading a default address the fields values are not loaded like other values get loaded. For example, the phone number is loaded by calling the function
$this->getAddress()->getTelephone();
but when i call my custom field whose name is address_mobile like
$this->getAddress()->getAddressMobile();
The system can not pull the value, like it pulls for telephone. Below is the source code of how the field appears in hidden section.