/**
* Retrieve default attribute backend model by attribute code
*
* @return string
*/
protected function _getDefaultBackendModel()
{
switch ($this->getAttributeCode()) {
case 'created_at':
return 'Magento\\Eav\\Model\\Entity\\Attribute\\Backend\\Time\\Created';
case 'updated_at':
return 'Magento\\Eav\\Model\\Entity\\Attribute\\Backend\\Time\\Updated';
case 'store_id':
return 'Magento\\Eav\\Model\\Entity\\Attribute\\Backend\\Store';
case 'increment_id':
return 'Magento\\Eav\\Model\\Entity\\Attribute\\Backend\\Increment';
default:
break;
}
return parent::_getDefaultBackendModel();
}