OperationalError: no such table: django_content_type and django_session - mysql

Question

I cannot access my app, when I enter the URL, it gives me the error
OperationalError: no such table: django_session
This usually means I need to migrate, or delete my sqlite database and redo migrations, so I did that multiple times. I deleted everything in the migrations folder and sqlite3.db and ran:
python manage.py makemigrations app_name
python manage.py migrate app_name
No errors yet. Then after creating a superuser I run:
python manage.py runserver
It tells me 18 migrations have not been made, which I was able to fix with:
python manage.py migrate --fake
I try the site and again I get the no such table: django_session error.
I read this thread
Django: no such table: django_session
and tried everything in it, including the approved solution, same error.
Also, when I try to run the migrate command again, I get this error
OperationalError: no such table: django_content_type
so I went to this thread
sqlite3.OperationalError: no such table: django_content_type
once again, the solutions that worked for them did not work for me.
This problem started after we migrated to MySQL, I tried to switch databases using a .env file, but ran into these problems, so I tried to switch back to sqlite so I can at least work on the project. The team is in the middle of moving to MySQL, and we have people working successfully with both databases, so it shouldn't be a database issue.
Here is my settings.py file:
import os
from pathlib import Path
from django.contrib.messages import constants as message_constants
# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.2/howto/deployment/checklist/
SECRET_KEY = os.environ.get("DJ_SECRET_KEY", default="Testing")
DEBUG = os.environ.get("DJ_DEBUG", default=True)
ALLOWED_HOSTS = ["redonkulator.apps.dev.mach9.usmc.mil", "localhost", "127.0.0.1"]
# Application definition
INSTALLED_APPS = [
"django.contrib.admin",
"django.contrib.auth",
"django.contrib.contenttypes",
"django.contrib.sessions",
"django.contrib.messages",
"django.contrib.staticfiles",
"redonkulator_app.apps.RedonkulatorAppConfig",
"jquery",
"debug_toolbar",
]
MIDDLEWARE = [
"django.middleware.security.SecurityMiddleware",
"django.contrib.sessions.middleware.SessionMiddleware",
"django.contrib.auth.middleware.AuthenticationMiddleware",
"django.middleware.common.CommonMiddleware",
"debug_toolbar.middleware.DebugToolbarMiddleware",
"django.middleware.csrf.CsrfViewMiddleware",
"django.contrib.messages.middleware.MessageMiddleware",
"django.middleware.clickjacking.XFrameOptionsMiddleware",
"django.contrib.messages.middleware.MessageMiddleware",
]
ROOT_URLCONF = "iiimef_project.urls"
TEMPLATES = [
{
"BACKEND": "django.template.backends.django.DjangoTemplates",
"DIRS": ["templates"],
"APP_DIRS": True,
"OPTIONS": {
"context_processors": [
"django.template.context_processors.debug",
"django.template.context_processors.request",
"django.contrib.auth.context_processors.auth",
"django.contrib.messages.context_processors.messages",
],
},
},
]
AUTH_USER_MODEL = "redonkulator_app.MlptUsers"
WSGI_APPLICATION = "iiimef_project.wsgi.application"
# Database
# https://docs.djangoproject.com/en/3.2/ref/settings/#databases
DATABASES = {
"default": {
"ENGINE": os.environ.get("SQL_ENGINE", "django.db.backends.sqlite3"),
"NAME": os.environ.get(
"SQL_DATABASE",
os.path.join(BASE_DIR, "db.sqlite3"),
),
"USER": os.environ.get("SQL_USER", "user"),
"PASSWORD": os.environ.get("SQL_PASSWORD", "password"),
"HOST": os.environ.get("SQL_HOST", "localhost"),
"PORT": os.environ.get("SQL_PORT", "5432"),
}
}
# Password validation
# https://docs.djangoproject.com/en/3.2/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
"NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
},
{
"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",
},
{
"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",
},
{
"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",
},
]
# Internationalization
# https://docs.djangoproject.com/en/3.2/topics/i18n/
LANGUAGE_CODE = "en-us"
TIME_ZONE = "UTC"
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.2/howto/static-files/
STATIC_URL = "/static/"
STATIC_ROOT = os.path.join(BASE_DIR, "static")
# Default primary key field type
# https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field
DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
LOGIN_REDIRECT_URL = ""
LOGOUT_REDIRECT_URL = "/about"
LOGIN_URL = "/login"
MESSAGE_STORAGE = "django.contrib.messages.storage.cookie.CookieStorage"
# needed to overwrite bootsrap classes
MESSAGE_TAGS = {
message_constants.DEBUG: "debug",
message_constants.INFO: "info",
message_constants.SUCCESS: "success",
message_constants.WARNING: "warning",
message_constants.ERROR: "danger",
}
INTERNAL_IPS = [
"127.0.0.1",
]
I have session and contenttype in my installed apps and sessions in my middleware, is there anything in here that looks obviously wrong?
Here is my .env
DJ_SECRET_KEY=super-secret-key
DJ_ALLOWED_HOSTS=localhost 127.0.0.1 [::1] 0.0.0.0 *
DJ_DEBUG=True
SQL_DATABASE=redonkulator
SQL_ENGINE=django.db.backends.mysql
SQL_USER=[myusername]
SQL_PASSWORD=[mypassword]
SQL_HOST=localhost
SQL_PORT=3306
I know that this .env won't work with my settings, and that's okay as I'm just trying to get sqlite to work for now.
One more thing, starting today, slightly after this problem started, every django import is underlined in yellow. For example "django.contrib.messages" in settings.py is underlined, however I don't get a module import error, so I don't think that's the issue.
Finally, here is the traceback for the content_type error:
Traceback (most recent call last):
File "C:\Users\dwill\Documents\GitHub\MLPT\manage.py", line 22, in <module>
main()
File "C:\Users\dwill\Documents\GitHub\MLPT\manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
utility.execute()
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\management\__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\management\base.py", line 398, in execute
output = self.handle(*args, **options)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\management\base.py", line 89, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\management\commands\migrate.py", line 268, in handle
emit_post_migrate_signal(
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\management\sql.py", line 42, in emit_post_migrate_signal
models.signals.post_migrate.send(
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\dispatch\dispatcher.py", line 180, in send
return [
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\dispatch\dispatcher.py", line 181, in <listcomp>
(receiver, receiver(signal=self, sender=sender, **named))
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\auth\management\__init__.py", line 42, in create_permissions
create_contenttypes(app_config, verbosity=verbosity, interactive=interactive, using=using, apps=apps, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\contenttypes\management\__init__.py", line 119, in create_contenttypes
content_types, app_models = get_contenttypes_and_models(app_config, using, ContentType)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\contenttypes\management\__init__.py", line 94, in get_contenttypes_and_models
content_types = {
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\query.py", line 280, in __iter__
self._fetch_all()
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\query.py", line 1324, in _fetch_all
self._result_cache = list(self._iterable_class(self))
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\query.py", line 51, in __iter__
results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\sql\compiler.py", line 1175, in execute_sql
cursor.execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 98, in execute
return super().execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\sqlite3\base.py", line 423, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: django_content_type
and the django session error:
Traceback (most recent call last):
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\sqlite3\base.py", line 423, in execute
return Database.Cursor.execute(self, query, params)
The above exception (no such table: django_session) was the direct cause of the following exception:
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\views\decorators\cache.py", line 44, in _wrapped_view_func
response = view_func(request, *args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\admin\sites.py", line 414, in login
return LoginView.as_view(**defaults)(request)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\views\generic\base.py", line 70, in view
return self.dispatch(request, *args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\utils\decorators.py", line 43, in _wrapper
return bound_method(*args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\views\decorators\debug.py", line 89, in sensitive_post_parameters_wrapper
return view(request, *args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\utils\decorators.py", line 43, in _wrapper
return bound_method(*args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\utils\decorators.py", line 130, in _wrapped_view
response = view_func(request, *args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\utils\decorators.py", line 43, in _wrapper
return bound_method(*args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\views\decorators\cache.py", line 44, in _wrapped_view_func
response = view_func(request, *args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\auth\views.py", line 63, in dispatch
return super().dispatch(request, *args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\views\generic\base.py", line 98, in dispatch
return handler(request, *args, **kwargs)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\views\generic\edit.py", line 142, in post
return self.form_valid(form)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\auth\views.py", line 92, in form_valid
auth_login(self.request, form.get_user())
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\auth\__init__.py", line 111, in login
request.session.cycle_key()
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\sessions\backends\base.py", line 344, in cycle_key
self.create()
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\sessions\backends\db.py", line 51, in create
self._session_key = self._get_new_session_key()
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\sessions\backends\base.py", line 196, in _get_new_session_key
if not self.exists(session_key):
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\contrib\sessions\backends\db.py", line 47, in exists
return self.model.objects.filter(session_key=session_key).exists()
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\query.py", line 808, in exists
return self.query.has_results(using=self.db)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\sql\query.py", line 550, in has_results
return compiler.has_results()
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\sql\compiler.py", line 1145, in has_results
return bool(self.execute_sql(SINGLE))
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\models\sql\compiler.py", line 1175, in execute_sql
cursor.execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\debug_toolbar\panels\sql\tracking.py", line 198, in execute
return self._record(self.cursor.execute, sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\debug_toolbar\panels\sql\tracking.py", line 133, in _record
return method(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 98, in execute
return super().execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\dwill\Documents\GitHub\MLPT\myenv\lib\site-packages\django\db\backends\sqlite3\base.py", line 423, in execute
return Database.Cursor.execute(self, query, params)
Exception Type: OperationalError at /admin/login/
Exception Value: no such table: django_session

Answer 1

Try avoiding the .env file to rule that out.
Update settings.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'DBNAME',
'USER': 'USER',
'PASSWORD': 'PASS',
'HOST': '127.0.0.1',
'PORT': 3306
}
}
If this works then we have found the source of the problem and should double-check the location of the .env file and work backwards from there.

Answer 2

After making your migrations, try sync your database:
python manage.py migrate --run-syncdb
It has solved this error code for me several times.