With django-filter, is there a quick way to support all possible lookups for fields?

Question

django-filter allows you to easily declare filterable fields of a model.

For example,

class UserFilter(django_filters.FilterSet):
    class Meta:
        model = User
        fields = ['username']

provides an exact lookup for the username field which is equivalent to this...

class UserFilter(django_filters.FilterSet):
    class Meta:
        model = User
        fields = {
            'username': ['exact']
        }

I'm looking for a way support all possible lookup filters given the field so that I don't have to do this:

class UserFilter(django_filters.FilterSet):
    class Meta:
        model = User
        fields = {
            "username": ["exact", "iexact", "contains", "icontains", "startswith", ..., etc.]
        }

Answer 1

Override the get_fields(...) class method of FilterSet class as,

import django_filters as filters
# If you are using DRF, import `filters` as
# from django_filters import rest_framework as filters


class AnyModelFilter(filters.FilterSet):
    class Meta:
        model = AnyModel
        fields = '__all__'

    @classmethod
    def get_fields(cls):
        fields = super().get_fields()
        for field_name in fields.copy():
            lookup_list = cls.Meta.model._meta.get_field(field_name).get_lookups().keys()
            fields[field_name] = lookup_list
        return fields