问django查询集的批量联合

EN

def intersect(self, list_of_querysets):
    combined = list_of_querysets[0]
    for queryset in list_of_querysets:
        combined = combined | queryset
    return [combined]


def _get_template_folders(self, template_folder_list):
    """
    :rtype : list
    """

    parents = []
    for template_folder in template_folder_list:
        if not TemplateFolder.objects.filter(pk=template_folder).exists():
            continue
        templates = TemplateFolder.objects.filter(pk=template_folder)
        for template in templates:

            parent_folders = self._get_template_folders([template.template_folder_parent_id])
            if parent_folders is not None:
                parents.extend(parent_folders)

        if templates is not None:
            parents.append(templates)
    if parents:
        return parents
    else:
        return None

template_folders_list = self.intersect(self._get_template_folders(template_folder_list))