Change Details

## Part 1 # create `DiscountItemsEventHandler::SetCustomQuery` method # add WHERE filter to the `ItemName` calculated field (e.g. `$object->addFilter('test_filter', 'ItemName LIKE ' . $this->Conn->qstr('z'));`) # go to {nav E-commerce > Discounts & Certificates} section # create a discount with 1 product # confirm, that applied before filter works as expected ## Part 2 # create `DiscountItemsEventHandler::SetCustomQuery` method # add HAVING filter to the `ItemName` calculated field (e.g. `$object->addFilter('test_filter', 'ItemName LIKE ' . $this->Conn->qstr('z'), kDBList::HAVING_FILTER);`) # go to {nav E-commerce > Discounts & Certificates} section # create a discount with 1 product # confirm, that applied before filter works as expected