Python 报错： django.contrib.admin.sites.AlreadyRegistered: The model Consumer is already registered

素颜马尾好姑娘i 2022-08-29 10:23 13阅读 0赞

在 python 的执行过程中出错：

File "/opt/**/urls.py", line 617, in <module>
        sso_server = Server()
      File "/root/.virtualenvs/py3.6/lib/python3.6/site-packages/simple_sso/sso_server/server.py", line 144, in __init__
        self.register_admin()
      File "/root/.virtualenvs/py3.6/lib/python3.6/site-packages/simple_sso/sso_server/server.py", line 147, in register_admin
        admin.site.register(Consumer, self.client_admin)
      File "/root/.virtualenvs/py3.6/lib/python3.6/site-packages/django/contrib/admin/sites.py", line 109, in register
        raise AlreadyRegistered('The model %s is already registered' % model.__name__)
    django.contrib.admin.sites.AlreadyRegistered: The model Consumer is already registered

报错提示 Consumer 模块已经注册，即此时再注册属于重复注册 !

解决方法步骤如下：

找到 /root/.virtualenvs/py3.6/lib/python3.6/site-packages/simple\_sso/sso\_server/server.py 文件， 并编辑（147行，报错提示），修改代码如下：

141     def __init__(self, **kwargs):
        142         for key, value in kwargs.items():
        143             setattr(self, key, value)
        144         self.register_admin()
        145
        146     def register_admin(self):
        147         if Consumer not in admin.site._registry:
        148             admin.site.register(Consumer, self.client_admin)
        149
        150     def has_access(self, user, consumer):
        151         return True

第 147 行代码为新增代码： 即在注册 Consumer 模块之前进行判断，已有 Consumer 模块则不再注册。

备注：此处使用的是 django == 2.0 版本， 若后期程序正常执行， 可考虑将 147 行代码注释，再重启服务，因为我在后期注释后程序可正常运行， 应该是之前的模块注册存在问题；

为什么这么修改可参看 /root/.virtualenvs/py3.6/lib/python3.6/site-packages/django/contrib/admin/sites.py 源码。