Is there a way to augment django QuerySets with extra attributes?

Question

I\'m trying to add some extra attributes to the elements of a QuerySet so I can use the extra information in templates, instead of hitting the database multiple times. Let m

Answer 1

If you iterate queryset before .reverse, then call the reverse and iterate the resulting queryset again then there will be 2 different SQL queries executed, .reverse() method won't reverse already fetched results, it will re-fetch the (possibly changed) results with an another SQL query. So what you're doing is not only fragile but also inefficient.

In order to avoid the second SQL query you can either reverse the queryset before iterating it or reverse a list with model instances in python using e.g. builtin 'reversed' function (see MattoTodd answer).