django - 将自定义 QuerySet 添加到 UserModel 会导致 makemigrations 异常

Question

我想为我的用户模型创建一个自定义查询集。但是，我不能简单地使用objects = UserQuerySet.as_manager()，因为标准 Django User 模型已经有一个自定义 UserManager。

我的代码很简单：

class UserQuerySet(MyBaseQuerySet):
    def opted_out_method(self):
        return

class User(AbstractUser):
    objects = UserManager.from_queryset(UserQuerySet)()
    # etc... 

此代码有效，除非我这样做：

$manage.py makemigrations --dry-run
  File "./manage.py", line 49, in <module>
    execute_from_command_line(sys.argv)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/core/management/commands/makemigrations.py", line 164, in handle
    changes = autodetector.changes(
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/migrations/autodetector.py", line 43, in changes
    changes = self._detect_changes(convert_apps, graph)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/migrations/autodetector.py", line 129, in _detect_changes
    self.new_apps = self.to_state.apps
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/migrations/state.py", line 210, in apps
    return StateApps(self.real_apps, self.models)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/migrations/state.py", line 273, in __init__
    self.render_multiple([*models.values(), *self.real_models])
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/migrations/state.py", line 308, in render_multiple
    model.render(self)
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/migrations/state.py", line 577, in render
    body.update(self.construct_managers())
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/migrations/state.py", line 536, in construct_managers
    as_manager, manager_path, qs_path, args, kwargs = manager.deconstruct()
  File "/home/user/.cache/pypoetry/virtualenvs/django-app-4WxKU_E8-py3.8/lib/python3.8/site-packages/django/db/models/manager.py", line 61, in deconstruct
    raise ValueError(

引发的异常是“找不到管理器。请注意，您需要从使用 'from_queryset()" 动态生成的管理器继承，这就是我正在做的。

有没有人遇到过这个？

我目前正在使用 Django 2.2，不确定这是否已在 3+ 中修复。

标签： django