I'm doing a module with a new type of product using a helper/model for virtual product, and inserting a new attribute via SQL setup (in Module ...)

My helper model:

class ItepCompany_Incomm_Model_Product_Virtual
    extends Mage_Catalog_Model_Product_Type_Virtual

My pro mysql-install-0.1.0.php code is:

$this->addAttribute(ItepCompany_Incomm_Model_Product_Virtual::ENTITY, 'terms_of_use', array(
    'group'         => 'General',
    'input'         => 'textarea',
    'type'          => 'text',
    'sort_order' => 4,
    'label'         => 'Terms of use',
    'backend'       => '',
    'visible'       => true,
    'required'      => true,
    'wysiwyg_enabled' => true,
    'visible_on_front' => true,
    'global'        => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,


Only when accessing the admin panel of the error:

Fatal error: Undefined class constant 'ENTITY' ... \ sql \ add_product_attribute \ MySQL4-install-0.1.0.php on line 3

Did not generate anything in the log, which caused the problem?

  • 1
    ItepCompany_Incomm_Model_Product_Virtual::ENTITY this cause the problem have you defined the constant? – Qaisar Satti May 13 '15 at 5:02
  • for example, the $this->addAttribute(Mage_Catalog_Model_Product::ENTITY.... , takes the folder app/core/mage/catalog/model/product and creates in the every type of product, i need to create in my custom type of product.... the constant have definitions in model wich i was using, but this error is a problem – Matheus Silva Itep May 13 '15 at 7:36

you are trying to get the constant that are not define in your class.


in this class ENTITY constant in define

const ENTITY                 = 'catalog_product';

so solution is that use the default product ENTITY or define in your custom class.

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