python - Using MySQL with Django - Access denied for user '@'localhost

Question

So I'm learning Django (1, 3, 1, 'final', 0) through this resource: http://www.djangobook.com/en/2.0/chapter05/

I installed 'mysql-server' and 'python-mysqldb' via Synaptic. I changed the relevant setting in settings.py.

The book mentioned above tells us to run from the manage.py shell:

>>> from django.db import connection
>>> cursor = connection.cursor()

I get this error after running these commands:

OperationalError: (1044, "Access denied for user ''@'localhost' to database 'mydb'")

  Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 250, in cursor
    cursor = self.make_debug_cursor(self._cursor())
  File "/usr/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 322, in _cursor
    self.connection = Database.connect(**kwargs)
  File "/usr/lib/python2.7/dist-packages/MySQLdb/__init__.py", line 81, in Connect
    return Connection(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 187, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
OperationalError: (1044, "Access denied for user ''@'localhost' to database 'mydb'")

MySQL did ask me to set a root password when I installed it the first time, would that be utilized here? or is it something else?

Answer 1

Your user does not have an access to database. Use the commands below to set up your database.

DROP DATABASE IF EXISTS `mydb`;
CREATE DATABASE `mydb`
    DEFAULT CHARACTER SET utf8
    DEFAULT COLLATE utf8_general_ci;

USE 'mysql';
GRANT ALL PRIVILEGES ON mydb.* TO 'mydb_user'@'localhost' IDENTIFIED BY 'your_password'

WITH GRANT OPTION;
FLUSH PRIVILEGES;

Also, you need to have enough privileges to run it. Save it as script.sql then,

$mysql -u root -p < script.sql

Than on to settings.py where you need to make sure your db settings are set up properly

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'mydb',                  
        'USER': 'mydb_user',             
        'PASSWORD': 'your_password',                  
        'HOST': '',                     
        'PORT': '',                      
    }
}

and

python manage.py syncdb

and you're done.

Answer 2

I also ran into this problem while following the Django tutorial on testing (https://docs.djangoproject.com/en/dev/intro/tutorial05/). When trying to test the polls app, I received the following error:

user@host:~/django/mysite$ python manage.py test polls

Creating test database for alias 'default'...
Got an error creating the test database: (1044, "Access denied for user 'admin'@'localhost' to database 'test_django_mysite'")
Type 'yes' if you would like to try deleting the test database 'test_django_mysite', or 'no' to cancel: 

The problem is that django is creating a temporary database called test_django_mysite.
I was able to solve this problem by granting access to 'admin'@'localhost' on the test_django_mysite database that it was trying to create.

mysql> GRANT ALL PRIVILEGES ON test_django_mysite.* TO admin@localhost IDENTIFIED BY 'mypassword';
Query OK, 0 rows affected (0.04 sec)

It's worth noting that I only granted the privileges to test_django_mysite. I didn't need to actually create it.

Answer 3

My problem was that I was editing settings.py whereas configuration should have been done in local_settings.py

Now everything seems to work.

Answer 4

The django book is fairly old by now. in particular, database settings are now a dictionary, rather then the bunch of variables described in the django book.

looking at the last line of your traceback, it looks like it's trying connect without a username.

try changing

DATABASE_ENGINE = ''
DATABASE_NAME = ''
DATABASE_USER = ''
DATABASE_PASSWORD = ''

to

DATABASES = {
    'default': {
        'ENGINE': '',
        'NAME': ''
        'USER': ''
        # etc
    }
}

Answer 5

If you changed the database password and updated settings.py, you will also have to restart the wsgi.py process, for example by restarting apache.

Answer 6

You need to verify database configurations in settings.py file and also if your db user has privilege to access the database and perform operations on it.

Please see if solutions mentioned here works for you.

Answer 7

I had a similar problem and yet all settings seemed correct. I later noticed MySQL was using port 3308 and yet I had port 3306 in my Django settings file. I updated the settings file to resolve the issue.

Answer 8

Just gonna leave my answer here because I lost few good minutes (almost hour) on this matter.

Watch Your copy-paste :) Unfortunately, mysql return success while granting priviliges for not existing user to not existing database...

Both queries:

GRANT ALL PRIVILEGES ON python_user.* TO 'python_db'@'%' WITH GRANT OPTION;

and:

GRANT ALL PRIVILEGES ON python_db.* TO 'python_user'@'%' WITH GRANT OPTION

will return success. Aldo I don't have such a user called python_db and db named python_user. :) That's sad. My mistake but also MySql was not helpful enough with output. :)