We are still responsible for adding the additional products to the user's cart when selected. We do this by adding custom submit handlers to the form. In this case we add two custom submit handlers, one before the standard one to clear the cart in case there's anything else in there, and one after where we add the selected optional products.

In the end, one argument against using Views for our content queries overrode all others: we wanted our client to use Views. Our client had specified that once they received the sites, their own developers would be using Views to build blocks and pages themselves. We knew that if we worked in Views for our own work, the Views we created would eventually be exposed to them, which leads to possibilities of regression and error. We wanted our core querying functionality to continue to function without concern that it might be tampered with.

The GeShi Filter module provides a filter for source code syntax highlighting for a wide range of languages.

Source code can be entered with for example ... or .... Automatically adding line numbers is possible too with for example [ruby linenumbers="normal"].