Add text instead of just number to “Year” filter

Hi Stanislav,

Great work! Is it possible to add a third option that will filter based on a text attribute instead of a number attribute like the Year?

For example, I have this structure: Make – Model – Type
Is it possible to create this one, so that a restirction would be:
Honda – GX – AR123
Honda – GX – FR334
……

The page I need help with: [log in to see the link]