Remove telephone as required field on shipping but not billing Magento - magento

Question

How do I make the telephone field not required on shipping but have it required on billing in onepage checkout?
I have followed many forums that point to the below method but this disables the required element on both billing and shipping?
http://swarminglabs.com/magento-making-the-telephone-field-not-required-at-checkout/#comment-2687

Answer 1

I do not know any extension that would allow this. If you want to make it work you should work with Mage_Customer_Model_Form. During checkout process magento calls validateData() method of this model. This method is defined in Mage_Eav_Model_Form. You need to rewrite another model, namely Mage_Sales_Model_Quote_Address as its parent Mage_Customer_Model_Address_Abstract has a valid() method that checks if telephone is not emtpy. So, assuming you have removed is_required and validation_rules for this attribute
in a module etc/config.xml
<config>
<global>
<models>
<customer>
<rewrite>
<form>YourNamespace_YourModule_Model_Customer_Form</form>
</rewrite>
</customer>
<sales>
<rewrite>
<quote_address>YourNamespace_YourModule_Model_Quote_Address</quote_address>
</rewrite>
</sales>
</models>
</global>
</config>
in YourNamespace/YourModule/Model/Customer/Form.php
class YourNamespace_YourModule_Model_Customer_Form extends Mage_Customer_Model_Form {
public function validateData(array $data) {
//perform parent validation
$result = parent::validateData($data);
//checking billing address; perform additional validation
if ($this->getEntity()->getAddressType() == Mage_Sales_Model_Quote_Address::TYPE_BILLING) {
$valid = $this->_validatePhoneForBilling($data);
if ($result !== true && $valid !== true) {
$result[] = $valid;
}
elseif ($result === true && $valid !== true) {
$result = $valid;
}
}
return $result;
}
protected function _validatePhoneForBilling($data) {
$errors = array();
if (empty($data['telephone'])) {
$attribute = $this->getAttribute('telephone');
$label = Mage::helper('eav')->__($attribute->getStoreLabel());
$errors[] = Mage::helper('eav')->__('"%s" is a required value.', $label);
}
if (empty($errors)) {
return true;
}
return $errors;
}
}
in YourNamespace/YourModule/Model/Quote/Address.php
class YourNamespace_YourModule_Model_Quote_Address extends Mage_Sales_Model_Quote_Address {
public function validate() {
if ($this->getAddressType() == self::TYPE_SHIPPING) {
$result = parent::validate();
$errorMsg = Mage::helper('customer')->__('Please enter the telephone number.');
if (is_array($result) && in_array($errorMsg, $result)) {
$result = array_diff($result, array($errorMsg));
}
if (empty($result)) {
return true;
}
return $result;
}
else {
return parent::validate();
}
}
}