Fatal error: Undefined class constant 'ENTITY'

Question

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 (削除) helper (削除ここまで) model:

class ItepCompany_Incomm_Model_Product_Virtual
 extends Mage_Catalog_Model_Product_Type_Virtual
{
}

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

<?php
$this->startSetup();
$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,
));
$this->endSetup();

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?

• Qaisar Satti: ItepCompany_Incomm_Model_Product_Virtual::ENTITY this cause the problem have you defined the constant?
• Matheus Silva Itep: 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

Answer 1

ItepCompany_Incomm_Model_Product_Virtual::ENTITY 

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

Mage_Catalog_Model_Product::ENTITY

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.