django call_command syncdb failed: unable to open database file - database

Question

I want to add some python codes after syncdb, so I decide to write a build.py which does everything including syncdb.
I write something in build.py as:
import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
from django.core.management import call_command
from django.contrib.auth.models import User
call_command('syncdb', interactive=False)
But when I run build.py, it said:
Traceback (most recent call last):
File "/home/csimstu/PycharmProjects/TeenHope/TeenHope/build.py", line 5, in <module>
call_command('syncdb', interactive=False)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 161, in call_command
return klass.execute(*args, **defaults)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 255, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 385, in handle
return self.handle_noargs(**options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/syncdb.py", line 56, in handle_noargs
cursor = connection.cursor()
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 324, in cursor
cursor = self.make_debug_cursor(self._cursor())
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/sqlite3/base.py", line 306, in _cursor
self._sqlite_create_connection()
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/sqlite3/base.py", line 296, in _sqlite_create_connection
self.connection = Database.connect(**kwargs)
sqlite3.OperationalError: unable to open database file
I've tried ./manage.py syncdb and use call_command in interactive shell mode, and both ways worked perfectly okay. How could it be?

Answer 1

If the database file isn't found that's probably because you didn't use a full path in your settings.
import os
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.realpath(os.path.join(os.path.dirname(__file__), "relative_path_here", "database.db")),
Out of topic: I'd recommend to use Fabric for this kind of commands.