actions.py 文件源码

def do_action(self, queryset):
        # Check that the user has delete permission for the actual model
        if not self.has_delete_permission():
            raise PermissionDenied

        using = router.db_for_write(self.model)

        # Populate deletable_objects, a data structure of all related objects that
        # will also be deleted.
        deletable_objects, model_count, perms_needed, protected = get_deleted_objects(
            queryset, self.opts, self.user, self.admin_site, using)

        # The user has already confirmed the deletion.
        # Do the deletion and return a None to display the change list view again.
        if self.request.POST.get('post'):
            if perms_needed:
                raise PermissionDenied
            self.delete_models(queryset)
            # Return None to display the change list page again.
            return None

        if len(queryset) == 1:
            objects_name = force_unicode(self.opts.verbose_name)
        else:
            objects_name = force_unicode(self.opts.verbose_name_plural)

        if perms_needed or protected:
            title = _("Cannot delete %(name)s") % {"name": objects_name}
        else:
            title = _("Are you sure?")

        context = self.get_context()
        context.update({
            "title": title,
            "objects_name": objects_name,
            "deletable_objects": [deletable_objects],
            'queryset': queryset,
            "perms_lacking": perms_needed,
            "protected": protected,
            "opts": self.opts,
            "app_label": self.app_label,
            'action_checkbox_name': ACTION_CHECKBOX_NAME,
        })

        # Display the confirmation page
        return TemplateResponse(self.request, self.delete_selected_confirmation_template or
                                self.get_template_list('views/model_delete_selected_confirm.html'), context)