Django beginner problem: manage.py dbsync - django

Question

I'm running ubuntu 9.04 32b and got django from Synaptics.
My settings.py is configured for a sqlite3 database.
I've been through this tutorial and got the following error when trying to run the command python manage.py syncdb :
Traceback (most recent call last):
File "manage.py", line 11, in
execute_manager(settings)
File "/usr/local/lib/python2.6/dist-packages/django/core/management/__init__.py", line 340, in execute_manager
utility.execute()
File "/usr/local/lib/python2.6/dist-packages/django/core/management/__init__.py", line 295, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.6/dist-packages/django/core/management/base.py", line 192, in run_from_argv
self.execute(*args, **options.__dict__)
File "/usr/local/lib/python2.6/dist-packages/django/core/management/base.py", line 219, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.6/dist-packages/django/core/management/base.py", line 348, in handle
return self.handle_noargs(**options)
File "/usr/local/lib/python2.6/dist-packages/django/core/management/commands/syncdb.py", line 51, in handle_noargs
cursor = connection.cursor()
File "/usr/local/lib/python2.6/dist-packages/django/db/backends/__init__.py", line 56, in cursor
cursor = self._cursor(settings)
File "/usr/local/lib/python2.6/dist-packages/django/db/backends/sqlite3/base.py", line 145, in _cursor
self.connection = Database.connect(**kwargs)
sqlite3.OperationalError: unable to open database file
Do anyone have a clue on my problem ?

Answer 1

In settings.py are you using a relative path to the sqlite file?
If you are, try changing that to an absolute path.
i.e. instead of:
~/project/mydata.db
use
/home/user/project/mydata.db

Answer 2

This can also happen if your database name is the same as your project name. To fix it just change the name of your db e.g. by adding a .db to the NAME. So if your DATABASE NAME in settings.py was 'epic_project' change it to 'epic_project.db'
Long and boring explanation:
If you start your project by running:
django startproject epic_project
your folder structure will be like this:
/path/to/epic_project/
manage.py
epic_project/
settings.py
if then in your settings.py you set your database as:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': 'epic_project',
...
}
}
when
python manage.py syncdb
runs it tries to open or create a sqlite db file at /path/to/epic_project/epic_project, but there is a directory there, so it says "oh ok the path exists already, let's open it as an sqlite db", unfortunately for sqlite it's a directory and not a DB, so it cries and django presents these tears to you as "sqlite3.OperationalError: unable to open database file"

Answer 3

might be a permission problem, does your user have sufficient right to write on the folder? for example if you do
sudo python manage.py syncdb
instead, does it work?

Answer 4

For Google's sake:
The path to the database must be the full path to the file --- not just the directory where the file lives.

Answer 5

I had the same problem on Windows then realized that syncdb would not create the specified folder if it didn't already exist. I had specified c:/mysite/db/sqlite3.db in settings but the /db/ folder didn't exist. Created it in terminal then re-ran syncdb successfully.

Answer 6

I had the same problem two days ago. I solved it by setting the 'NAME' in the DATABASE dictionary (settings.py) to the absolute path.
For example.
settings.py
DATABASES = {
'default' : {
'ENGINE' : 'django.db.backends.sqlite3',
'NAME' : DATABASE_PATH,
}
}
here you can set the DATABASE_PATH at the top of the settings.py as such
(Not sure if this will work for windows)
SETTINGS_DIR = os.path.dirname(__file__)
PROJECT_PATH = os.path.abspath(os.path.join(SETTINGS_DIR, os.pardir))
DATABASE_PATH = os.path.abspath(os.path.join(PROJECT_PATH, 'your-database-name'))
For Windows you might have to use the replace method. (Not sure .. But you can try it out as follows)
PROJECT_PATH = os.path.abspath(os.path.join(SETTINGS_DIR, os.pardir).replace('\\', '/'))
Same goes for the DATABASE_PATH.
PS. Correct me if I am wrong.

Answer 7

Similar to answer from user104264 - different perspective...
Currently following the YouTube tutorial I had the same error. Seems to me while running the manage.py in a virtualenv django project directory ...path to virtual env.../django_project/, the database name inside /myapp/settings.py was simply 'storage.db' so
(django-v)...path to virtual env project.../django_project/>python manage.py syncdb
created ...path to virtual env project.../django_project/storage.db
-Bill

Answer 8

If you are specifying a full path to db file and are still having issues, try putting an r before the string.
ie.
r'C:\home\usr\mysite\sqlite3.db'

Answer 9

The problem I was running into was a bootstrapping issue where some model lookups were being done at import (outside of any class or function). Per the docs, this is a bad idea.