python之自定义和非托管用户模型/滞后用户表

我正在尝试让 django-guardian 使用我的自定义用户模型。该模型继承自AbstractUser，也继承自GuardianUserMixin。这是 User 模型:

class User(AbstractUser, GuardianUserMixin): 
 
    class Meta: 
        managed = False 
        db_table = 'users' 

我面临的问题是在检查权限时。例如这里 request.user.has_perm(...)

这是错误信息:

编程错误在/manageDb/mira/follow/14/ 关系“users_groups”不存在 第 1 行:...sion"."group_id"= "auth_group"."id") INNER JOIN "users_gro...

回溯:

    File "/home/khajvah/Project/mira_website/manageDb/views.py" in delete 
  486.             if request.user.has_perm('follow', follow_object): 
File "/usr/local/lib/python3.4/dist-packages/django/contrib/auth/models.py" in has_perm 
  353.         return _user_has_perm(self, perm, obj) 
File "/usr/local/lib/python3.4/dist-packages/django/contrib/auth/models.py" in _user_has_perm 
  281.             if backend.has_perm(user, perm, obj): 
File "/usr/local/lib/python3.4/dist-packages/guardian/backends.py" in has_perm 
  89.         return check.has_perm(perm, obj) 
File "/usr/local/lib/python3.4/dist-packages/guardian/core.py" in has_perm 
  54.         return perm in self.get_perms(obj) 
File "/usr/local/lib/python3.4/dist-packages/guardian/core.py" in get_perms 
  110.                 perms = list(set(chain(user_perms, group_perms))) 
File "/usr/local/lib/python3.4/dist-packages/django/db/models/query.py" in __iter__ 
  162.         self._fetch_all() 
File "/usr/local/lib/python3.4/dist-packages/django/db/models/query.py" in _fetch_all 
  965.             self._result_cache = list(self.iterator()) 
File "/usr/local/lib/python3.4/dist-packages/django/db/models/query.py" in iterator 
  1217.             for row in compiler.results_iter(): 
File "/usr/local/lib/python3.4/dist-packages/django/db/models/sql/compiler.py" in results_iter 
  794.             results = self.execute_sql(MULTI) 
File "/usr/local/lib/python3.4/dist-packages/django/db/models/sql/compiler.py" in execute_sql 
  840.             cursor.execute(sql, params) 
File "/usr/local/lib/python3.4/dist-packages/django/db/backends/utils.py" in execute 
  79.             return super(CursorDebugWrapper, self).execute(sql, params) 
File "/usr/local/lib/python3.4/dist-packages/django/db/backends/utils.py" in execute 
  64.                 return self.cursor.execute(sql, params) 
File "/usr/local/lib/python3.4/dist-packages/django/db/utils.py" in __exit__ 
  97.                 six.reraise(dj_exc_type, dj_exc_value, traceback) 
File "/usr/local/lib/python3.4/dist-packages/django/utils/six.py" in reraise 
  658.             raise value.with_traceback(tb) 
File "/usr/local/lib/python3.4/dist-packages/django/db/backends/utils.py" in execute 
  64.                 return self.cursor.execute(sql, params) 

问题似乎是 guardian 正在对表 users_groups 进行查询，该表不存在，而是称为 auth_groups，由 django.auth 创建。所以问题归结为在 guardian

请您参考如下方法:

我做了一个 hacky 解决方案。 guardian 所做的是期待与 User 和 auth_group 的ManyToMany 关系。 AbstractUser 默认执行此操作，但由于我手动指定了 managed = False 和 db_table，Django 在迁移时未创建关系，所以我为这种关系创建了一个中间模型，下面是我的 model.py 的一部分:

class User(AbstractBaseUser, PermissionsMixin, GuardianUserMixin): 
 
    username=models.CharField(unique=True, max_length=123) 
    date_joined = models.DateTimeField(default=datetime.now()) 
    email=models.CharField(unique=True, max_length=125) 
    first_name=models.CharField(max_length=128) 
    last_name=models.CharField(max_length=128) 
 
    is_staff = models.NullBooleanField(null=True) 
    is_active = models.NullBooleanField(null=True) 
 
    USERNAME_FIELD='username' 
    REQUIRED_FIELDS = ['password', 'email', 'first_name', 'last_name'] 
 
    objects = UserManager() 
    class Meta: 
        managed = False 
        db_table = 'users' 
 
class GroupUser(models.Model): 
    group = models.ForeignKey(Group) 
    user = models.ForeignKey(User) 
 
    class Meta: 
        db_table = 'users_groups' 

关键是组表要有正确的名字。 IE。 guardian 正在等待 userTableName_groups。