Removed unused code

from . import models

class ContributionFormMixin(django.views.generic.edit.FormMixin):

    def can_post(self):

        return self.request.user.has_perms((self.permission_required_post,), self.object)

    def form_valid(self, form):

        form.save()

        return super().form_valid(form)

    def get_form(self):

        if self.can_post():

            return super().get_form()

        return None

    def get_form_kwargs(self):

        kwargs = super().get_form_kwargs()

        kwargs['contributions'] = self.object.container.contributions

        kwargs['instance'] = models.Contribution(

                author=self.request.user.gestalt, container=self.object.container)

        return kwargs

    def has_permission(self):

        self.object = self.get_object()

        if self.request.method == 'GET':

            return super().has_permission()

        elif self.request.method == 'POST':

            return self.can_post()

        else:

            return False

    def post(self, request, *args, **kwargs):

        form = self.get_form()

        if form.is_valid():

            return self.form_valid(form)

        else:

            return self.form_invalid(form)

    def get_success_url(self):

        return self.object.get_absolute_url()

class Delete(AssociationMixin, core.views.PermissionMixin, django.views.generic.UpdateView):

    permission_required = 'contributions.delete'

    model = models.Contribution