我删除了db以及用于重置数据库的所有迁移。但删除后，我试图运行 Makemigrations它显示错误
OperationalError：没有这样的表：student_app_grade
我有一个名为student_app的应用 并且有一个名为Grade
的模型这是完整的错误
python3 manage.py makemigrations
Traceback (most recent call last):
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py", line 337, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such table: student_app_grade
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
utility.execute()
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/management/__init__.py", line 359, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/management/base.py", line 294, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/management/base.py", line 342, in execute
self.check()
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/management/base.py", line 374, in check
include_deployment_checks=include_deployment_checks,
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/management/base.py", line 361, in _run_checks
return checks.run_checks(**kwargs)
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/checks/registry.py", line 81, in run_checks
new_errors = check(app_configs=app_configs)
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 14, in check_url_config
return check_resolver(resolver)
File "/home/ajit/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 24, in check_resolver
for pattern in resolver.url_patterns:
File "/home/ajit/.local/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/ajit/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 313, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/home/ajit/.local/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/ajit/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 306, in urlconf_module
return import_module(self.urlconf_name)
File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 665, in exec_module
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "/home/ajit/Documents/Choice_feedback/Choice_feedback_main/Choice_feedback_main/urls.py", line 8, in <module>
url(r'^user/', include('registration_app.urls')),
File "/home/ajit/.local/lib/python3.5/site-packages/django/conf/urls/__init__.py", line 50, in include
urlconf_module = import_module(urlconf_module)
File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 665, in exec_module
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "/home/ajit/Documents/Choice_feedback/Choice_feedback_main/registration_app/urls.py", line 10, in <module>
from registration_app.views import (
File "/home/ajit/Documents/Choice_feedback/Choice_feedback_main/registration_app/views.py", line 11, in <module>
from registration_app.forms import (
File "/home/ajit/Documents/Choice_feedback/Choice_feedback_main/registration_app/forms.py", line 45, in <module>
class AddtionalInformationForm(forms.Form):
File "/home/ajit/Documents/Choice_feedback/Choice_feedback_main/registration_app/forms.py", line 59, in AddtionalInformationForm
for grade in q:
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/models/query.py", line 256, in __iter__
self._fetch_all()
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/models/query.py", line 1087, in _fetch_all
self._result_cache = list(self.iterator())
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/models/query.py", line 54, in __iter__
results = compiler.execute_sql()
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/models/sql/compiler.py", line 835, in execute_sql
cursor.execute(sql, params)
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/ajit/.local/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/ajit/.local/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py", line 337, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: student_app_grade
xlB
这是我的forms.py
import roman
from collections import OrderedDict
from django.contrib.auth.forms import (
UserCreationForm,
UserChangeForm,
PasswordChangeForm
)
from django import forms
from django.contrib.auth.models import User
from student_app.models import Grade
class RegistrationForm(UserCreationForm):
email = forms.EmailField(required=True)
username = forms.CharField(max_length=24, widget=forms.TextInput(attrs={'name':"username"}))
class Meta:
model = User
fields = (
'username',
'email',
'password1',
'password2'
)
def save(self,commit = True):
user = super(RegistrationForm,self).save(commit = False)
# user.first_name = self.cleaned_data['first_name']
# user.last_name = self.cleaned_data['last_name']
user.email = self.cleaned_data['email']
if commit:
user.save()
return user
class EditProfileForm(UserChangeForm):
class Meta:
model = User
fields = (
'email',
'password'
)
class AddtionalInformationForm(forms.Form):
hash_class_ordered = []
hash_div_ordered = []
hash_class = []
hash_div = []
grade_ol = OrderedDict()
grade_ = []
grade_n = []
yq = []
div_ = []
div_n = []
grade_t = ()
q = Grade.objects.all()
for grade in q:
x = grade.grade
temp = x.split("-")
hash_class.append(temp[0])
hash_div.append(temp[1])
for c in hash_class:
if c not in grade_n:
grade_n.append(c)
for d in hash_div:
temp = (d, d)
if temp not in div_:
div_.append(temp)
div_.sort()
for h_c in grade_n:
h_c_n = roman.fromRoman(h_c)
temp = (h_c, h_c_n)
hash_class_ordered.append(temp)
hash_class_ordered.sort()
for c in hash_class_ordered:
c = (c[0], c[0])
yq.append(c)
grade = tuple(yq)
div = tuple(div_)
first_name = forms.CharField(max_length=20)
last_name = forms.CharField(max_length=20)
student_class_grade = forms.ChoiceField(choices=grade)
student_class_div = forms.ChoiceField(choices=div)
roll_no = forms.CharField(max_length=10)
答案 0 :(得分：3)
尝试，
希望它有所帮助。
答案 1 :(得分：0)
检查student_app/migrations/__init__.py中是否有拼写错误（init之前和之后是否有两个下划线？文件名中是否有空格????
运行makemigrations时是否出现错误？
删除您的迁移和数据库并粘贴到问题 makemigrations的完整输出或完整追溯，如果错误出现在其他地方（并在出现时解释：您可能过早导入某些内容）
更新：问题出在forms.py（AddtionalInformationForm）的第59行。在Python中，构造函数代码应该在def __init__(self, ...)中。请参阅Django的表单文档，并了解有关python的面向对象编程的更多信息。另外：在Django中，模板用于呈现HTML。
答案 2 :(得分：0)
我修复了与登录应用程序相同的问题。
(venv) MacBook-Pro:src admin$ python manage.py makemigrations Login
Migrations for 'Login':
Login/migrations/0001_initial.py
- Create model User
(venv) MacBook-Pro:src admin$ python manage.py migrate Login
Operations to perform:
Apply all migrations: Login
Running migrations:
Applying Login.0001_initial... OK
(venv) MacBook-Pro:src admin$ python manage.py runserver 0.0.0.0:8000
Performing system checks...
System check identified no issues (0 silenced).
July 11, 2017 - 13:05:56
Django version 1.11.2, using settings 'CabProj.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CONTROL-C
答案 3 :(得分：0)
我知道这篇文章很旧，但是如果其他任何人遇到了这个问题，则可能是由于您在允许迁移之前运行了某个程序。例如在view.py或可能正在更新等中
由于数据库已被重置，因此错误听起来像是正在尝试对它执行某些操作，即使它正在重置中（因此不存在）。