Django Filters Package with Ordering Django.How

class CompanyLanguageFilter(django_filters.FilterSet):
    language__name = django_filters.CharFilter(label='Language', lookup_expr='icontains',)
    group__name = django_filters.CharFilter(label='Group', lookup_expr='icontains',)

    class Meta:
        model = CompanyLanguage
        fields = fields = {
        }

Ordering

    CHOICES = (
        ('ascending', 'Ascending'),
        ('desending', 'Descending')
    )
    ordering = django_filters.ChoiceFilter(label='Ordering', choices=CHOICES, method='filter_by_order')

    def filter_by_order(self, queryset, name, value):
        expression = 'language__name' if value == 'ascending' else '-language__name'
        return queryset.order_by(expression)

Resource:

https://www.youtube.com/watch?v=nle3u6Ww6Xk&t=3s

Official example:

https://django-filter.readthedocs.io/en/stable/ref/filters.html#orderingfilter

class UserFilter(FilterSet):
    account = CharFilter(field_name='username')
    status = NumberFilter(field_name='status')

    o = OrderingFilter(

Tuple-mapping retains order

        fields=(
            ('username', 'account'),
            ('first_name', 'first_name'),
            ('last_name', 'last_name'),
        ),

Labels do not need to retain order

        field_labels={
            'username': 'User account',
        }
    )

    class Meta:
        model = User
        fields = ['first_name', 'last_name']

>>> UserFilter().filters['o'].field.choices
[
    ('account', 'User account'),
    ('-account', 'User account (descending)'),
    ('first_name', 'First name'),
    ('-first_name', 'First name (descending)'),
    ('last_name', 'Last name'),
    ('-last_name', 'Last name (descending)'),
]