What code (method, function) to automatically activate the product property in Bitrix? Place the code in result_modifier?

Question

Programming

How can a product property be automatically activated in Bitrix? The product has a "promotion" property. It is necessary that for all products on the site that fall under the condition, this property is activated.
I tried to automatically activate this property using the CIBlockProperty::Update and CIBlockElement::SetPropertyValues ​​methods. The property values ​​were changed, but the "Promotion" checkbox was not displayed on the product, and the checkbox was not active. How can this problem be solved?

Answer 1

the CIBlockElement::SetPropertyValues ​​method should have worked.
What did you mean by
First, try to test the code on one product as in the example (change it to your own property)
https://dev.1c-bitrix.ru/api_help/iblock/classes/c...
Under what condition do you want to activate the "Promotion" checkbox?