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Django: unknown database name

I am trying to change the database in django from sqlite3 to mysql
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'django',
'USER':'myusername',
'PASSWORD':'mypassword',
'HOST':'127.0.0.1',
'PORT':'3306',
}
}
and after trying to run my server i get this error
System check identified no issues (0 silenced).
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 244, in ensure_connection
self.connect()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 225, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\base.py", line 244, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\__init__.py", line 123, in Connect
return Connection(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\connections.py", line 185, in __init__
super().__init__(*args, **kwargs2)
MySQLdb.OperationalError: (1049, "Unknown database 'django'")
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\threading.py", line 973, in _bootstrap_inner
self.run()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\threading.py", line 910, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\commands\runserver.py", line 137, in inner_run
self.check_migrations()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\base.py", line 576, in check_migrations
executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\migrations\executor.py", line 18, in __init__
self.loader = MigrationLoader(self.connection)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\migrations\loader.py", line 58, in __init__
self.build_graph()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\migrations\loader.py", line 235, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\migrations\recorder.py", line 81, in applied_migrations
if self.has_table():
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\migrations\recorder.py", line 57, in has_table
with self.connection.cursor() as cursor:
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 284, in cursor
return self._cursor()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 260, in _cursor
self.ensure_connection()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 244, in ensure_connection
self.connect()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\utils.py", line 91, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 244, in ensure_connection
self.connect()
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 225, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\base.py", line 244, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\__init__.py", line 123, in Connect
return Connection(*args, **kwargs)
File "C:\Users\ыв\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\connections.py", line 185, in __init__
super().__init__(*args, **kwargs2)
django.db.utils.OperationalError: (1049, "Unknown database 'django'")
i dont know why django can't see my db, maybe you guys have some ideas.
Mysql didn't get me any problems before this case,
i haven't found a way to fix an error, so I counting on your help.
thanks in advance

The shortest answer to that is that django database ist't crated in MySQL. Django will not create the database for you like it do on sqlite3, you have to had this database created before.
You can ensure that you created the database by running a command like that:
$ mysql -h 127.0.0.1 -pmypassword -u myusername # to connect on your mysql
mysql> show databases; # list all databases on your MySQL server
To create a new database my recomendation is the following:
mysql> create database django charset utf8mb4; -- charset is optional
mysql> use django;

Q: Python Django Docker - Unknown server host 'db' error when trying to make a super user

I am trying to use the command python manage.py createsuperuser and docker exec -it veganetwork-db-1 python manage.py createsuperuser to add myself as a superuser to my microservices project, however when I try to run both of these commands I get Unknown server host 'db' in my Windows Powershell, here is the entire error:
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/mysql/base.py", line 73, in execute
return self.cursor.execute(query, args)
File "/usr/local/lib/python3.9/site-packages/MySQLdb/cursors.py", line 206, in execute
res = self._query(query)
File "/usr/local/lib/python3.9/site-packages/MySQLdb/cursors.py", line 319, in _query
db.query(q)
File "/usr/local/lib/python3.9/site-packages/MySQLdb/connections.py", line 259, in query
_mysql.connection.query(self, query)
MySQLdb._exceptions.ProgrammingError: (1146, "Table 'veganetwork.auth_user' doesn't exist")
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/app/manage.py", line 22, in <module>
main()
File "/app/manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.9/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.9/site-packages/django/core/management/__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.9/site-packages/django/core/management/base.py", line 330, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.9/site-packages/django/contrib/auth/management/commands/createsuperuser.py", line 79, in execute
return super().execute(*args, **options)
File "/usr/local/lib/python3.9/site-packages/django/core/management/base.py", line 371, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.9/site-packages/django/contrib/auth/management/commands/createsuperuser.py", line 100, in handle
default_username = get_default_username()
File "/usr/local/lib/python3.9/site-packages/django/contrib/auth/management/__init__.py", line 140, in get_default_username
auth_app.User._default_manager.get(username=default_username)
File "/usr/local/lib/python3.9/site-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/django/db/models/query.py", line 425, in get
num = len(clone)
File "/usr/local/lib/python3.9/site-packages/django/db/models/query.py", line 269, in __len__
self._fetch_all()
File "/usr/local/lib/python3.9/site-packages/django/db/models/query.py", line 1308, in _fetch_all
self._result_cache = list(self._iterable_class(self))
File "/usr/local/lib/python3.9/site-packages/django/db/models/query.py", line 53, in __iter__
results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
File "/usr/local/lib/python3.9/site-packages/django/db/models/sql/compiler.py", line 1156, in execute_sql
cursor.execute(sql, params)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py", line 98, in execute
return super().execute(sql, params)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/usr/local/lib/python3.9/site-packages/django/db/utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/mysql/base.py", line 73, in execute
return self.cursor.execute(query, args)
File "/usr/local/lib/python3.9/site-packages/MySQLdb/cursors.py", line 206, in execute
res = self._query(query)
File "/usr/local/lib/python3.9/site-packages/MySQLdb/cursors.py", line 319, in _query
db.query(q)
File "/usr/local/lib/python3.9/site-packages/MySQLdb/connections.py", line 259, in query
_mysql.connection.query(self, query)
django.db.utils.ProgrammingError: (1146, "Table 'veganetwork.auth_user' doesn't exist")
PS C:\Users\trevo\OneDrive\Desktop\veganetwork\veganetworkmain> python manage.py migrate auth
Traceback (most recent call last):
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 200, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\base.py", line 234, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\__init__.py", line 123, in Connect
return Connection(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\connections.py", line 185, in __init__
super().__init__(*args, **kwargs2)
MySQLdb._exceptions.OperationalError: (2005, "Unknown server host 'db' (11001)")
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\trevo\OneDrive\Desktop\veganetwork\veganetworkmain\manage.py", line 22, in <module>
main()
File "C:\Users\trevo\OneDrive\Desktop\veganetwork\veganetworkmain\manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
utility.execute()
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\base.py", line 398, in execute
output = self.handle(*args, **options)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\base.py", line 89, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\commands\migrate.py", line 75, in handle
self.check(databases=[database])
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\management\base.py", line 419, in check
all_issues = checks.run_checks(
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\checks\registry.py", line 76, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\checks\database.py", line 13, in check_database_backends
issues.extend(conn.validation.check(**kwargs))
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\validation.py", line 9, in check
issues.extend(self._check_sql_mode(**kwargs))
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\validation.py", line 13, in _check_sql_mode
if not (self.connection.sql_mode & {'STRICT_TRANS_TABLES', 'STRICT_ALL_TABLES'}):
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\base.py", line 405, in sql_mode
sql_mode = self.mysql_server_data['sql_mode']
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\base.py", line 366, in mysql_server_data
with self.temporary_connection() as cursor:
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\contextlib.py", line 117, in __enter__
return next(self.gen)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 603, in temporary_connection
with self.cursor() as cursor:
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 259, in cursor
return self._cursor()
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 235, in _cursor
self.ensure_connection()
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\base\base.py", line 200, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\backends\mysql\base.py", line 234, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\__init__.py", line 123, in Connect
return Connection(*args, **kwargs)
File "C:\Users\trevo\AppData\Local\Programs\Python\Python39\lib\site-packages\MySQLdb\connections.py", line 185, in __init__
super().__init__(*args, **kwargs2)
django.db.utils.OperationalError: (2005, "Unknown server host 'db' (11001)")
I have tried some other methods in some other posts like creating a class named Command in my manage.py script to create the superuser: Create django super user in a docker container without inputting password, using docker-compose run django python manage.py createsuperuser rather than the regular docker command which is docker exec -it veganetwork-db-1 python manage.py createsuperuser: https://github.com/vchaptsev/cookiecutter-django-vue/issues/25, and finally trying to change the depends_on variable inside my docker-compose.yml file and restarting the docker container itself: django.db.utils.OperationalError: (2005, "Unknown MySQL server host 'db' (-2)"). I have tried all of these solutions but they have all failed.
here is my docker-compose file as well as my dockerfile:
version: '3.9'
services:
backend:
build:
context: .
dockerfile: dockerfile
command: 'python manage.py runserver 0.0.0.0:8000'
ports:
- 8000:8000
volumes:
- .:/app
depends_on:
- db
db:
image: mysql:5.7.22
restart: always
environment:
MYSQL_DATABASE: veganetworkmain
MYSQL_USER: root
MYSQL_PASSWORD: root
MYSQL_ROOT_PASSWORD: root
volumes:
- .dbdata:/var/lib/mysql
ports:
- 3306:3306
dockerfile:
FROM python:3.9
ENV PYTHONUNBUFFERED 1
WORKDIR /app
COPY requirements.txt /app/requirements.txt
RUN pip install -r requirements.txt
COPY . /app
CMD python manage.py runserver 0.0.0.0:8000
What exactly am I doing wrong here, thank you!

Pycharm / Django defer Oracle Database connection

I have a Django project that connects to an Oracle database - implemented in PyCharm. I would like the app to monitor the connection and display a status as to whether the database is up or down. I stopped the listener to simulate an error. However, when I start the PyCharm server to test the functionality, the app immediately attempts a database connection and fails. Is it possible to defer the database connection until I can command one within the app?
Here is the error traceback on server startup:
C:\Users\steve\PycharmProjects\Tools\venv\Scripts\python.exe C:/Users/steve/PycharmProjects/Tools/Tools/manage.py runserver
Watching for file changes with StatReloader
Performing system checks...
System check identified no issues (0 silenced).
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\base\base.py", line 200, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\oracle\base.py", line 229, in get_new_connection
return Database.connect(
cx_Oracle.DatabaseError: ORA-12541: TNS:no listener
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\steve\AppData\Local\Programs\Python\Python39\lib\threading.py", line 954, in _bootstrap_inner
self.run()
File "C:\Users\steve\AppData\Local\Programs\Python\Python39\lib\threading.py", line 892, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\core\management\commands\runserver.py", line 121, in inner_run
self.check_migrations()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\core\management\base.py", line 486, in check_migrations
executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\migrations\executor.py", line 18, in init
self.loader = MigrationLoader(self.connection)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\migrations\loader.py", line 53, in init
self.build_graph()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\migrations\loader.py", line 220, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\migrations\recorder.py", line 77, in applied_migrations
if self.has_table():
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\migrations\recorder.py", line 55, in has_table
with self.connection.cursor() as cursor:
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\base\base.py", line 259, in cursor
return self._cursor()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\base\base.py", line 235, in _cursor
self.ensure_connection()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\utils.py", line 90, in exit
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\base\base.py", line 200, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\steve\PycharmProjects\Tools\venv\lib\site-packages\django\db\backends\oracle\base.py", line 229, in get_new_connection
return Database.connect(
django.db.utils.DatabaseError: ORA-12541: TNS:no listener

Migration error(django.db.utils.OperationalError)

I'm trying to migrate my custom user model and I run makemigrations command to make migrations for new models. But when I run migrate command it throws this error :
conn = _connect(dsn, connection_factory=connection_factory,
**kwasync) django.db.utils.OperationalError
Trace back:
(venv_ruling) C:\Users\enosh\venv_ruling\ruling>python manage.py migrate
Traceback (most recent call last):
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 200, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\postgresql\base.py", line 187, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\enosh\venv_ruling\lib\site-packages\psycopg2\__init__.py", line 127, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\enosh\venv_ruling\ruling\manage.py", line 22, in <module>
main()
File "C:\Users\enosh\venv_ruling\ruling\manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
utility.execute()
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\management\__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\management\base.py", line 398, in execute
output = self.handle(*args, **options)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\management\base.py", line 89, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\management\commands\migrate.py", line 75, in handle
self.check(databases=[database])
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\management\base.py", line 419, in check
all_issues = checks.run_checks(
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\checks\registry.py", line 76, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\core\checks\model_checks.py", line 34, in check_all_models
errors.extend(model.check(**kwargs))
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\models\base.py", line 1290, in check
*cls._check_indexes(databases),
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\models\base.py", line 1680, in _check_indexes
connection.features.supports_covering_indexes or
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\postgresql\features.py", line 93, in is_postgresql_11
return self.connection.pg_version >= 110000
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\postgresql\base.py", line 329, in pg_version
with self.temporary_connection():
File "C:\Users\enosh\AppData\Local\Programs\Python\Python39\lib\contextlib.py", line 117, in __enter__
return next(self.gen)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 603, in temporary_connection
with self.cursor() as cursor:
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 259, in cursor
return self._cursor()
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 235, in _cursor
self.ensure_connection()
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection
self.connect()
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\base\base.py", line 200, in connect
self.connection = self.get_new_connection(conn_params)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\utils\asyncio.py", line 26, in inner
return func(*args, **kwargs)
File "C:\Users\enosh\venv_ruling\lib\site-packages\django\db\backends\postgresql\base.py", line 187, in get_new_connection
connection = Database.connect(**conn_params)
File "C:\Users\enosh\venv_ruling\lib\site-packages\psycopg2\__init__.py", line 127, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError
models.py
from django.contrib.auth.models import AbstractUser
class CustomUser(AbstractUser):
"""extend usermodel"""
class Meta:
verbose_name_plural = 'CustomUser'
settings.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'rulings',
'USER': 'xxxxxxx',
'PASSWORD': 'xxxxxxx',
'HOST': '',
'PORT': '',
}
}
AUTH_USER_MODEL = 'accounts.CustomUser'
The postgresql's database is empty.(ver.12.6)
I just mentioned user model and settings in this question but still if more code is required then tell me I'll update my question with that information. Thank you

I don't know if you have left the port empty for the question or it is actually empty, but try this in the console and see if the connection is successful.
conn=psycopg2.connect(database="rulings", user="xxx", password="xxx",port=5432)
Also this might not be your port(it is the default but yours might be changed) check your port number \conninfo in the postgres shell. And let me know if it helps.

You have to check for the host_ip or the port number in the settings.py file of django.

Failing to open localhost page

I try to install django in my mac pro and I finished installing but when I want to run this command :
python manage.py runserver
Stack Feedback:
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/__init__.py", line 330, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/base.py", line 393, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/base.py", line 444, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/commands/syncdb.py", line 25, in handle
call_command("migrate", **options)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/__init__.py", line 120, in call_command
return command.execute(*args, **defaults)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/base.py", line 444, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/core/management/commands/migrate.py", line 93, in handle
executor = MigrationExecutor(connection, self.migration_progress_callback)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/migrations/executor.py", line 19, in __init__
self.loader = MigrationLoader(self.connection)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/migrations/loader.py", line 47, in __init__
self.build_graph()
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/migrations/loader.py", line 182, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/migrations/recorder.py", line 59, in applied_migrations
self.ensure_schema()
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/migrations/recorder.py", line 49, in ensure_schema
if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/backends/base/base.py", line 162, in cursor
cursor = self.make_debug_cursor(self._cursor())
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/backends/base/base.py", line 135, in _cursor
self.ensure_connection()
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/backends/base/base.py", line 130, in ensure_connection
self.connect()
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/utils.py", line 97, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/backends/base/base.py", line 130, in ensure_connection
self.connect()
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/backends/base/base.py", line 119, in connect
self.connection = self.get_new_connection(conn_params)
File "/usr/local/lib/python2.7/site-packages/Django-1.8.4-py2.7.egg/django/db/backends/sqlite3/base.py", line 204, in get_new_connection
conn = Database.connect(**conn_params)
django.db.utils.OperationalError: unable to open database file
I then tried my sqlite3 in the python, it works.
So I wanna how can I do it?