在Django中,我在models.py
中添加了一些模型。在manage.py makemigrations
之后,manage.py migrate
提出了这个例外:
django.db.utils.OperationalError: no such table: auth_test_usertranslatorprofile
所以我已经删除了所有旧的迁移并再次运行makemigrations
和migrate
,这似乎有效。
不幸的是,我注意到它没有帮助,因为当我尝试点击User customer profiles
的User translator profiles
时它会引发异常:
环境:
Request Method: GET
Request URL: http://127.0.0.1:8000/admin/auth_test/usertranslatorprofile/
Django Version: 1.8.7
Python Version: 2.7.10
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'auth_test')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware')
Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in get_response
132. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in wrapper
618. return self.admin_site.admin_view(view)(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
110. response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func
57. response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\contrib\admin\sites.py" in inner
233. return view(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapper
34. return bound_func(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
110. response = view_func(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\django\utils\decorators.py" in bound_func
30. return func.__get__(self, type(self))(*args2, **kwargs2)
File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in changelist_view
1550. self.list_max_show_all, self.list_editable, self)
File "C:\Python27\lib\site-packages\django\contrib\admin\views\main.py" in __init__
82. self.get_results(request)
File "C:\Python27\lib\site-packages\django\contrib\admin\views\main.py" in get_results
177. result_count = paginator.count
File "C:\Python27\lib\site-packages\django\core\paginator.py" in _get_count
72. self._count = self.object_list.count()
File "C:\Python27\lib\site-packages\django\db\models\query.py" in count
318. return self.query.get_count(using=self.db)
File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in get_count
466. number = obj.get_aggregation(using, ['__count'])['__count']
File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in get_aggregation
447. result = compiler.execute_sql(SINGLE)
File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
840. cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\utils.py" in execute
79. return super(CursorDebugWrapper, self).execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\utils.py" in execute
64. return self.cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\utils.py" in __exit__
98. six.reraise(dj_exc_type, dj_exc_value, traceback)
File "C:\Python27\lib\site-packages\django\db\backends\utils.py" in execute
64. return self.cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\sqlite3\base.py" in execute
318. return Database.Cursor.execute(self, query, params)
Exception Type: OperationalError at /admin/auth_test/usertranslatorprofile/
Exception Value: no such table: auth_test_usertranslatorprofile
我正在附上我的文件:
models.py:
from django.db import models
from django.contrib.auth.models import User
class Language(models.Model):
shortcut = models.CharField(max_length=6)
name = models.CharField(max_length=50)
price_per_sign = models.FloatField()
class UserTranslatorProfile(models.Model):
user = models.OneToOneField(User)
languages = models.ManyToManyField(Language)
price_per_word = models.FloatField()
class UserCustomerProfile(models.Model):
user = models.OneToOneField(User)
admin.py:
from django import forms
from .models import Language
from django.contrib.auth.models import User
from django.contrib.auth.forms import UserCreationForm
class FreelancerRegistrationForm(forms.Form):
language = forms.ModelChoiceField(queryset=Language.objects.all().order_by('shortcut'))
你知道问题出在哪里吗?谢谢
我用这些步骤解决了同样的问题:
db.sqlite3
)__pycache__
文件夹中删除所有内容migrations
和__pycache__
目录如果您确定已清除所有上述文件,请运行:
python manage.py makemigrations
python manage.py migrate
我希望这有帮助。
wihch的另一个案例可以生成没有这样的表错误。如果您的views.py或类似的代码执行在导入时尝试访问数据库的代码,即导入views.py有副作用,那么从头开始将不起作用。
当您的代码使用现有数据库时,会发生这种情况,现在您尝试在没有数据库的情况下启动。只需更改views.py即可导入而无需副作用。如果您不想修改设计,请执行以下操作:
from django.db.utils import OperationalError
format_list = [('', '(all)')]
geom_type_list = [('', '(all)')]
try:
format_list.extend([(i[0],i[0])
for i in Format.objects.values_list('name')])
geom_type_list.extend([(i[0],i[0])
for i in Geom_type.objects.values_list('name')])
except OperationalError:
pass # happens when db doesn't exist yet, views.py should be
# importable without this side effect
添加到terry_brown的答案,这是导致我的问题的原因。我有一个自定义用户模型与ForeignKey到另一个模型。我将默认值设置为DB中的第一个对象。当我在数据库中有数据时,它工作。但是,当我从头开始时,它不起作用,因为它在导入时立即执行(因此甚至不进行迁移)。
class User(AbstractBaseUser, PermissionsMixin):
subscription_plan = models.ForeignKey(SubscriptionPlan, default=SubscriptionPlan.objects.first().id)
我不得不牺牲那个default
(评论出来)。
更新:更好的解决方案是使用初始迁移或固定装置预填充数据库。
也许是时间不过了......当我试图将Django 1.11安装“克隆”到其他目录然后初始尝试管理makemigrations时,我遇到同样的问题。
我按照以下方式解决问题:
django-admin.py startproject app_name
管理createsuperuser
多数民众赞成没有错误,一切正常。
彼得
如果其他人遇到此问题并且接受的解决方案无效,请查看您的数据库路径,数据库路径应该是绝对路径,
'NAME': '/pathto-db/default.db',
在命令下运行。这个问题解决了我
manage.py migrate --run-syncdb