OperationalError: no such table after deleting db and migrations - django

Question

I deleted db and all migrations for resetting my database. But after the deletion when I tried to run
Makemigrations it is showing the error that
OperationalError: no such table : student_app_grade
I have an app named student_app
And in that there is a model with name Grade
this is the full error
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
this is my 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)

Answer 1

Try,
rebuild migrations: python manage.py makemigrations student_app
migrate: python manage.py migrate
Hope it helps.

Answer 2

I know this post is old but in case anyone else runs into this, the problem could possibly be if you are having a program run before the migrations are being allowed to take place. Such as in the view.py or maybe updating, etc.
Since the db is being reset, the error sounds like something is trying to be done to it even though it was in the middle of being reset (thus not existing).

Answer 3

Check that you don't have typos in student_app/migrations/__init__.py (Do you have two underlines before and after init?? Is there a space somewhere in the filename????)
Does the error appear when running makemigrations?
Delete your migrations and db and paste into your question the full output of makemigrations or the full traceback if the error appears somewhere else (and explain when it appears: you might be importing something too early)
Update: The problem is in line 59 in forms.py (AddtionalInformationForm). In Python constructor code should be in def __init__(self, ...). Please refer to Django's forms docs and learn more about python's object oriented programming. Also: in Django, templates are used to render HTML.

Answer 4

I fixed the same issue as following for my Login app.
(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

Answer 5

See the full error traceback. In that, you can find the line in file where you are querying from the db, maybe mostly ( in forms ). You need to temporary delete/comments out the those lines. And then re-run the migrations. You need to keep tracing back and keep deleting/comments outing the lines having query after makemigrations command. At last it will create the migrations files.