Save addition information in payment method on Order Page

Question

I have created custom payment module in Magento for emi options.

But the issue is that when person place order, then in the invoice I can only see the payment method they used for place order, But cannot see emi option they have selected.

For example: this time it is showing me

Payment method:
xyz payment

But I also want add addition selected option like that:

Payment method
xyz payment
3 month emi

So, Please guide how can I use this in my payment module

Answer 1

In payment, to show extra information you will use the info block.

Step1:

Assign the info block in your custom payment model file

protected $_infoBlockType = 'payment/info_[custom_payment_name]';

Step 2:

Need to set emi options in $this->getInfoInstance(). Please refer the Mage_Payment_Model_Method_Purchaseorder file and function name assignData()

$this->getInfoInstance()->setAdditionalData([get emi option value]);

for ex:

$details['emi'] = 'xxxx';
$this->getInfoInstance()->setAdditionalData(serialize($details));

Step 3:

In Block folder create the payment info file extends info block, assign the payment info template file. Please refer default payment file(Purchaseorder), function name _construct() and add the additional data conversion refer below

protected function _construct()
{
    parent::_construct();
    $this->setTemplate('payment/info/[custompayment].phtml');
}

protected $_emi;

public function getEmi()
{
     if (is_null($this->_emi)) {
        $this->_convertAdditionalData();
     }
     return $this->_emi;
}

protected function _convertAdditionalData()
{
    $this->_emi = '';

    $details = @unserialize($this->getInfo()->getAdditionalData());        
    if (is_array($details)) {
         $this->_emi = isset($details['emi']) ? (string) $details['emi'] : '';
    }
    return $this;
}

Step 4:

Create phtml file design folder under current theme, app/design/fronted/[package]/[theme]/template/payment/info/[custom_payment_name].phtml

<?php  
echo ( if($this->getEmi()) ? $this->getEmi() : '');  
?>

Please check additional_data field in sales_flat_order_payment table for that last order, you can find the data details added.

Try this. Hope this help you

Answer 2

@venkat, I have used this code in module

Namespace/Module/Model/Standard.php

class Namespace_Module_Model_Standard extends Mage_Payment_Model_Method_Abstract {

    protected $_infoBlockType = 'ebsemi/info_pay';

        public function assignData($data)
        {
            if (!($data instanceof Varien_Object)) {
                $data = new Varien_Object($data);
            }
        $this->getInfoInstance()->setEmi($data->getEmi());
        return $this;
        }
    }

Namespace/Module/Block/Info/Pay.php

class Namespace_Module_Block_Info_Pay extends Mage_Payment_Block_Info{

    protected function _construct()
    {
            parent::_construct();
        $this->setTemplate('payment/info/pay.phtml');
    }
}

app/design/fronted/[package]/[theme]/template/payment/info/pay.phtml

<?php  
echo ( if($this->getInfo()->getEmi()) ? ($this->getInfo()->getEmi()) : '');  
?>