django admin添加用户组时报错

如图所示，点击创建后报错

很奇怪啊，我没有改任何初始代码

这是database_router的代码

from django.conf import settings

class DatabaseRouter(object):
    def db_for_read(self, model, **hints):
        app_label = model._meta.app_label
        if app_label in settings.DATABASES_APPS_MAPPING:
            res = settings.DATABASES_APPS_MAPPING[app_label]
            return res
        return None

    def db_for_write(self, model, **hints):
        app_label = model._meta.app_label
        if app_label in settings.DATABASES_APPS_MAPPING:
            return settings.DATABASES_APPS_MAPPING[app_label]
        return None

    def allow_relation(self, obj1, obj2, **hints):
        # 获取对应数据库的名字
        db_obj1 = settings.DATABASES_APPS_MAPPING.get(obj1._mata.app_label)
        db_obj2 = settings.DATABASES_APPS_MAPPING.get(obj2._mata.app_label)
        if db_obj1 and db_obj2:
            if db_obj1 == db_obj2:
                return True
            else:
                return False
        return None

    def db_for_migrate(self, db, app_label, model_name=None, **hints):
        if db in settings.DATABASES_APPS_MAPPING.values():
            return settings.DATABASES_APPS_MAPPING.get(app_label) == db
        elif app_label in settings.DATABASES_APPS_MAPPING:
            return False
        return None

allow_relation方法里面，是否想要访问的是_meta属性？

你的拼写是_mata，更正之后应该就没有问题了，有帮助请采纳，谢谢～

• 请看👉 ：Django Admin添加导入功能

在这段代码中，可能是有一个拼写错误导致了该错误。你在 allow_relation 和 db_for_migrate 方法中使用了 _mata 属性，而正确的拼写应该是 _meta。因此，你需要在这两个方法中将 _mata 替换为 _meta，并重新运行程序。修改后的代码如下：

from django.conf import settings

class DatabaseRouter(object):
    def db_for_read(self, model, **hints):
        app_label = model._meta.app_label
        if app_label in settings.DATABASES_APPS_MAPPING:
            res = settings.DATABASES_APPS_MAPPING[app_label]
            return res
        return None

    def db_for_write(self, model, **hints):
        app_label = model._meta.app_label
        if app_label in settings.DATABASES_APPS_MAPPING:
            return settings.DATABASES_APPS_MAPPING[app_label]
        return None

    def allow_relation(self, obj1, obj2, **hints):
        # 获取对应数据库的名字
        db_obj1 = settings.DATABASES_APPS_MAPPING.get(obj1._meta.app_label)
        db_obj2 = settings.DATABASES_APPS_MAPPING.get(obj2._meta.app_label)
        if db_obj1 and db_obj2:
            if db_obj1 == db_obj2:
                return True
            else:
                return False
        return None

    def db_for_migrate(self, db, app_label, model_name=None, **hints):
        if db in settings.DATABASES_APPS_MAPPING.values():
            return settings.DATABASES_APPS_MAPPING.get(app_label) == db
        elif app_label in settings.DATABASES_APPS_MAPPING:
            return False
        return None

你可以通过将 _mata 替换为 _meta，来解决该错误。