Order a listing based on two or more fields

I want to establish an ordering criteria based on more than one fields like:

parent_id + product_name + custom_field_whatever

I don't think I con do this with standard parametrization in the parameters for products area:




Can I do this through changes in a view file? Any clue?

No you can't do that via the interface. You actually can't do that via a view file edition either.

You will have to create a hikashop plugin implementing the trigger onBeforeProductListingLoad and change the second parameter (&$order) to the ordering that you want.