拿到所有的数据库分类

    cursor = connection.cursor()
    cursor.execute(f'select id,name_cn,name_en,code from new_db_type order by `position` asc')
    ret = [format_types(i) for i in cursor.fetchall()]
    for t in ret:
        # 根据中间表获取到分类下面的数据库所有数据
        cursor.execute(
            f'select d.name_en,d.name_cn,d.code,m.type_id,d.show_style,d.document,d.left_nav from new_db_type_middle'
            f' m join new_db_list d on d.id=m.db_id where m.type_id={t["id"]} order by `position`')
        t['dbs'] = [format_dbs(i) for i in cursor.fetchall()]
    cursor.close()
    return JsonResponse({'code': 200, 'msg': 'success', 'data': ret})