我正在开发一个新的django项目并坚持迁移。
我想创建一个UserModel,为了做到这一点,我到目前为止做了两件事。 1.我制作了AuthUser模型并在下面的类中设置了一个Meta类。
在 models.py
中class AuthUser(AbstractUser):
user_type_id = models.PositiveIntegerField(choices=UserTypes.choices())
user_id = models.PositiveIntegerField()
class Meta(AbstractUser.Meta):
swappable = 'AUTH_USER_MODEL'
@property
def user_type(self):
return UserTypes(self.user_type_id)
def original_orm(self):
if self.user_type.value == UserTypes.raijosha.value:
return RaijoshaUsers.objects.filter(id=self.user_id).first()
elif self.user_type.value == UserTypes.shuttennsha.value:
return Users.objects.filter(id=self.user_id).first()
在settings.py中,我设置了AUTH_USER_MODEL。
AUTH_USER_MODEL ='recommended.AuthUser'
这是错误代码。
Operations to perform:
Apply all migrations: admin, auth, contenttypes, recommend, recommend_raijousha, sessions
Traceback (most recent call last):
File "manage.py", line 25, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/__init__.py", line 363, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.6/dist-packages/django/core/management/__init__.py", line 355, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/commands/migrate.py", line 164, in handle
pre_migrate_apps = pre_migrate_state.apps
File "/usr/local/lib/python3.6/dist-packages/django/utils/functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/usr/local/lib/python3.6/dist-packages/django/db/migrations/state.py", line 218, in apps
return StateApps(self.real_apps, self.models)
File "/usr/local/lib/python3.6/dist-packages/django/db/migrations/state.py", line 295, in __init__
raise ValueError("\n".join(error.msg for error in errors))
ValueError: The field admin.LogEntry.user was declared with a lazy reference to 'recommend.authuser', but app 'recommend' doesn't provide model 'authuser'.
你能帮助我们或给我一个建议。
Applying admin.0001_initial...Traceback (most recent call last):
File "manage.py", line 25, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/__init__.py", line 363, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.6/dist-packages/django/core/management/__init__.py", line 355, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.6/dist-packages/django/core/management/commands/migrate.py", line 204, in handle
fake_initial=fake_initial,
File "/usr/local/lib/python3.6/dist-packages/django/db/migrations/executor.py", line 115, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python3.6/dist-packages/django/db/migrations/executor.py", line 145, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python3.6/dist-packages/django/db/migrations/executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "/usr/local/lib/python3.6/dist-packages/django/db/migrations/migration.py", line 129, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/usr/local/lib/python3.6/dist-packages/django/db/migrations/operations/models.py", line 97, in database_forwards
schema_editor.create_model(model)
File "/usr/local/lib/python3.6/dist-packages/django/db/backends/base/schema.py", line 254, in create_model
definition, extra_params = self.column_sql(model, field)
File "/usr/local/lib/python3.6/dist-packages/django/db/backends/base/schema.py", line 144, in column_sql
db_params = field.db_parameters(connection=self.connection)
File "/usr/local/lib/python3.6/dist-packages/django/db/models/fields/related.py", line 994, in db_parameters
return {"type": self.db_type(connection), "check": self.db_check(connection)}
File "/usr/local/lib/python3.6/dist-packages/django/db/models/fields/related.py", line 991, in db_type
return self.target_field.rel_db_type(connection=connection)
File "/usr/local/lib/python3.6/dist-packages/django/db/models/fields/related.py", line 909, in target_field
return self.foreign_related_fields[0]
File "/usr/local/lib/python3.6/dist-packages/django/db/models/fields/related.py", line 653, in foreign_related_fields
return tuple(rhs_field for lhs_field, rhs_field in self.related_fields if rhs_field)
File "/usr/local/lib/python3.6/dist-packages/django/db/models/fields/related.py", line 640, in related_fields
self._related_fields = self.resolve_related_fields()
File "/usr/local/lib/python3.6/dist-packages/django/db/models/fields/related.py", line 625, in resolve_related_fields
raise ValueError('Related model %r cannot be resolved' % self.remote_field.model)
ValueError: Related model 'recommend.authuser' cannot be resolved
考虑到建议,我确实删除了迁移文件。 但是上面显示了另一个错误。
答案 0 :(得分:9)
如果您执行默认的auth
应用迁移,然后又在AUTH_USER_MODEL
中更改了settings.py
,则会发生这种情况。您可以尝试以下操作:
# comment AUTH_USER_MODEL in settings.py so it points to default User model
python manage.py migrate auth zero
# uncomment to be AUTH_USER_MODEL='recommend.AuthUser'
python manage.py migrate auth
答案 1 :(得分:1)
我必须参考 this stack: 才能解决该问题。 我只是按照以下步骤操作:
因为我没有使用 sqlite,所以我在我的 settings.py 中做了新的数据库配置来引用我的 postgres:
我不再使用的旧数据库:
<块引用>DATABASES = { 'default': { 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'NAME': 'leszexpert', 'USER': 'postgres', 'PASSWORD': '', 'HOST': '127.0.0.1', 'PORT': '5432', } }
我想开始使用的新数据库:
<块引用>DATABASES = { 'default': { 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'NAME': 'leszexpert_db', 'USER': 'postgres', 'PASSWORD': '', 'HOST': '127.0.0.1', 'PORT': '5432', } }
如您所见,不同之处在于 DATABASE NAME(在 ENGINE 之后引用)!!!!!!
感谢您阅读我的回答
答案 2 :(得分:0)
我删除所有迁移文件和数据库并应用它。
然后我可以迁移。
答案 3 :(得分:0)
对我来说,帮助进行了两次迁移
AUTH_USER_MODEL = 'recommend.authuser'
)答案 4 :(得分:0)
注意:我正在使用sqlite3作为数据库。
嗨,
我删除了__init__.py
文件之外的所有迁移文件,轻松解决了这个问题。并删除db.sqlite3
。现在运行以下命令:python manage.py makemigrations
,然后运行python manage.py migrate
。现在,您必须再次创建超级用户,为此,只需键入以下命令:python manage.py createsuperuser
。然后它将提示输入用户名,电子邮件和密码,因此输入您的凭据,所有内容将继续正常运行,我希望这会有所帮助。
答案 5 :(得分:0)
root@abcomp:~/var/www/yourapp$sudo -u postgres psql
#list your databases
postgres=#\l
postgres=#\c your_dbname;
your_db=# delete from django_migrations;
# after pulling the latest working changes
(venv)root@abcomp/var/www/yourapp$./manage.py migrate --fake
答案 6 :(得分:0)
我正在使用 MySQL。
对我来说,解决方案是在 MySQL Workbench 中删除迁移文件夹中的文件(除了 __ init__.py)、DROP
和 CREATE
数据库并运行 python manage.py makemigrations
和 {再次{1}}。
因此,我不得不创建一个新的超级用户,而我的所有数据都丢失了:(