Django.QuerySet.Case.When.py

queryset = queryset.annotate(
    exact=Case(
        When(
            name__iexact=query,
            then=Value('1')
        ),
        When(
            name__istartswith=query,
            then=Value('2')
        ),
        When(
            name__iendswith=query,
            then=Value('3')
        ),
        When(
            name__icontains=query,
            then=Value('4')
        ),
        default=Value('5'),
        output_field=CharField(),
    )
).order_by('exact', 'name')