Is there a proper way to modify the form fields before validating the data on a Class Based FormView. More specifically a CreateView. Is necessary to use Class Based views ’cause I’m throwing in a bunch of custom mixins:

class Create(HtmxRequiredMixin, CreatedByMixin, HxFormValidationMixin, BaseMixin, CreateView):
    template_name = 'administration/form.html'
    model = Object
    form_class = Form
    success_url = reverse_lazy('object-list')
    hx_retarget = '#CREATE'
    base = 'object'
    views_list = ('create',)

I used the CreatedByMixin in the DRF viewset for the api rest. it looks like:

class CreatedByMixin:
    def create(self, request, *args, **kwargs):
        data = request.data.copy()
        if request.user.is_authenticated:
            data['creado_por'] = request.user.id
        serializer = self.get_serializer(data=data)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)

I want a similar mixin for my CreateView but I’m not sure what is the proper method to override