views.py

@method_decorator(login_required, name='dispatch')
class ImmatriculationCreate(CreateView):
    model = Immatriculation
    template_name = 'vol/immatriculation_add.html'
    fields = ['immatriculation',
              'type_avion']
    success_url = '/immatriculation_add/list'
    # template_name_suffix = '_add'

    def get_context_data(self, **kwargs):
        context = super(ImmatriculationCreate, self).get_context_data(**kwargs)
        data = Immatriculation.objects.all()
        context['data'] = data
        return context

    def form_valid(self, form):
        form.instance.user_id = self.request.user
        return super(ImmatriculationCreate, self).form_valid(form)

    def dispatch(self, *args, **kwargs):
        return super().dispatch(*args, **kwargs)