AttributeError: ‘Sack‘ object has no attribute ‘_rpmdb_version‘

Posted 2022-05-03 rtoax

AttributeError: 'Sack' object has no attribute '_rpmdb_version'
荣涛 2022-04-30

文档修改日志

日期	修改内容	修改人	备注
2022-04-30	创建	荣涛

问题描述

当我执行sudo dnf up更新操作系统时候发生：

[SKIPPED] xdg-desktop-portal-1.12.3-1.el9.x86_64.rpm: Already downloaded                               
[SKIPPED] xorg-x11-drv-fbdev-0.5.0-11.el9.x86_64.rpm: Already downloaded                               
[SKIPPED] xorg-x11-drv-vmware-13.2.1-18.el9.x86_64.rpm: Already downloaded                             
[SKIPPED] xorg-x11-drv-wacom-1.0.0-1.el9.x86_64.rpm: Already downloaded                                
[SKIPPED] zlib-devel-1.2.11-32.el9.x86_64.rpm: Already downloaded                                      
[SKIPPED] google-chrome-stable-101.0.4951.41-1.x86_64.rpm: Already downloaded                          
[SKIPPED] code-1.66.2-1649664637.el7.x86_64.rpm: Already downloaded                                    
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Traceback (most recent call last):
  File "/bin/dnf", line 58, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.9/site-packages/dnf/cli/main.py", line 201, in user_main
    errcode = main(args)
  File "/usr/lib/python3.9/site-packages/dnf/cli/main.py", line 67, in main
    return _main(base, args, cli_class, option_parser_class)
  File "/usr/lib/python3.9/site-packages/dnf/cli/main.py", line 106, in _main
    return cli_run(cli, base)
  File "/usr/lib/python3.9/site-packages/dnf/cli/main.py", line 130, in cli_run
    ret = resolving(cli, base)
  File "/usr/lib/python3.9/site-packages/dnf/cli/main.py", line 176, in resolving
    base.do_transaction(display=displays)
  File "/usr/lib/python3.9/site-packages/dnf/cli/cli.py", line 246, in do_transaction
    tid = super(BaseCli, self).do_transaction(display)
  File "/usr/lib/python3.9/site-packages/dnf/base.py", line 983, in do_transaction
    tid = self._run_transaction(cb=cb)
  File "/usr/lib/python3.9/site-packages/dnf/base.py", line 1049, in _run_transaction
    rpmdbv = self.sack._rpmdb_version()
AttributeError: 'Sack' object has no attribute '_rpmdb_version'

解决方案

因为提示：

  File "/usr/lib/python3.9/site-packages/dnf/base.py", line 1049, in _run_transaction
    rpmdbv = self.sack._rpmdb_version()
AttributeError: 'Sack' object has no attribute '_rpmdb_version'

我尝试了下载dnf，rpm相关的rpm包进行手动安装，发现仍旧提示上面的错误，所以我尝试了一种奇葩的方法，结果成功了，那就是：

修改代码/usr/lib/python3.9/site-packages/dnf/base.py的1049行代码，将_rpmdb_version函数直接替换成了字符串，字符串是：

[rongtao@192 ~]$ rpmdb --version
RPM version 4.16.1.3

直接替换。

其实我在更新操作系统后发现，原来调用’_rpmdb_version’的地方没有了：

        if self._record_history():
            using_pkgs_pats = list(self.conf.history_record_packages)
            installed_query = self.sack.query().installed()
            using_pkgs = installed_query.filter(name=using_pkgs_pats).run()
            rpmdbv = self._ts.dbCookie()
            lastdbv = self.history.last()
            if lastdbv is not None:
                lastdbv = lastdbv.end_rpmdb_version

            if lastdbv is None or rpmdbv != lastdbv:
                logger.debug(_("RPMDB altered outside of prog.").format(
                    prog=dnf.util.MAIN_PROG_UPPER))

Copyright (C) Rong Tao.