Question

我正在尝试将我的django应用程序从1.8.18更新到1.11.1并面临以下问题 TypeError：allow_migrate（）缺少1个必需的位置参数：'model'

我在网上搜索过，但没找到解决问题的方法。这是追溯

Traceback (most recent call last):
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/utils/autoreload.py", line 227, in wrapper
    fn(*args, **kwargs)
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 125, in inner_run
    self.check(display_num_errors=True)
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/core/management/base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/core/management/base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/core/checks/model_checks.py", line 30, in check_all_models
    errors.extend(model.check(**kwargs))
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/db/models/base.py", line 1282, in check
    errors.extend(cls._check_fields(**kwargs))
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/db/models/base.py", line 1357, in _check_fields
    errors.extend(field.check(**kwargs))
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 909, in check
    errors = super(AutoField, self).check(**kwargs)
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 219, in check
    errors.extend(self._check_backend_specific_checks(**kwargs))
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 321, in _check_backend_specific_checks
    if router.allow_migrate(db, app_label, model_name=self.model._meta.model_name):
  File "/srv/projects/TcellIDM/env/lib/python3.5/site-packages/django/db/utils.py", line 300, in allow_migrate
    allow = method(db, app_label, **hints)
TypeError: allow_migrate() missing 1 required positional argument: 'model'

请帮我检测问题位置或建议我应该在哪里解决问题。

Answer 1

DATABASE_ROUTERS设置似乎无法接受类列表，而只能接受点类路径的列表。

代替此：

DATABASE_ROUTERS = [MyRouterClass]

执行此操作：

DATABASE_ROUTERS = ['myapp.routers.MyRouterClass']

该特定路由器类位于myapp/routers.py中。如果像我一样在设置文件中定义路由器，我怀疑您需要将其移出。

Answer 2

def allow_migrate(self, db, app_label=None, model_name=None, **hints):
    """
    Make sure the auth app only appears in the 'auth_db'
    database.
    """
    if app_label == 'auth':
        return db == 'xxxx'
    return None

也许你可以添加model_name = None。我在app_lable上遇到了类似的错误。

Django迁移allow_migrate（）缺少1个必需的位置参数'model'

2 个答案: