I need a custom customer attribute of type int that should start with some 5-digit number and auto-increments each time a new customer is created.

Approach 1: Or should I make a simple int type attribute and fill it with customer's auto generated ID plus some 5-digit number as follow.

customer_id = 30;
custom_id = 10030;

Approach 2: Is there a way in magento to create an attribute of input type auto_increment? So I can set the default value to '10000' and it always get increment for new customer? If yes, then how can I make it auto_increment.

$installer->addAttribute('customer', 'cotp_id',  array(
    'type'     => 'int',
    'label'    => 'COTP ID',
    'input'    => 'hidden',
    'source'   => '',
    'visible'  => true,
    'required' => true,
    'default' => '10000',
    'frontend' => '',
    'unique'     => true,
    'note'       => 'Custom Attribute'

Approach 3: Or should I try to achieve this through some observer that call upon every time a new customer created, then get the attribute latest/highest value and increment one in it?

1 Answer 1


I am suggesting you to used Approach-3 with observer like this.

In your extension config.xml file avilabel here.


define code like this:


create Observer.php at


class Company_Extension_Model_Observer 
  public function customerRegisterSuccess(Varien_Event_Observer $observer) 
      //Get Customer detail like 
      $customer = $observer->getEvent()->getCustomer(); 

     // Here you need to add your logic to set that attribute value

  • Thanks @Dhiren for your answer. But the observer you've mentioned is not observer when customer created from admin. Oct 28, 2016 at 10:38
  • @MuhammadSaiid I edit my answer, if you talking about admin, then you need to used customer_save_after event. Oct 28, 2016 at 10:42
  • If above answer help you, accept as solution, so other get help. Oct 28, 2016 at 10:42
  • Yes thanks @Dhiren I get it. I hope it will be triggered for both admin and frontend customer registration. Oct 28, 2016 at 10:44
  • if you want only for admin, then put event in <adminhtml> instade of <global> Oct 28, 2016 at 10:46

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