syncdb problem with mongodb engine

[Lianghong Xu]

Hi,

I'm new to django. I'd like to use MongoDB as my backend engine and have installed all the required packages for a MongoDB django setup. However, when I run "python manage.py syncdb", I get this error:

Traceback (most recent call last):

  File "./manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 453, in execute_from_command_line

    utility.execute()

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 272, in fetch_command

    klass = load_command_class(app_name, subcommand)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 77, in load_command_class

    module = import_module('%s.management.commands.%s' % (app_name, name))

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module

    __import__(name)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/south/management/commands/__init__.py", line 13, in <module>

    from south.management.commands.syncdb import Command as SyncCommand

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/south/management/commands/syncdb.py", line 19, in <module>

    from south.db import dbs

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/south/db/__init__.py", line 84, in <module>

    db = dbs[DEFAULT_DB_ALIAS]

KeyError: 'default'

I searched a lot on the Internet on this problem and most answers are like this one: 

"You don't have correct DATABASES in your settings. There should be a database named 'default'".

However, I don't think there is a problem with my settings file which already sets the default database:

DATABASES = {

    'default': {

        'ENGINE': 'django_mongodb_engine',

        'NAME': 'wikipedia',

    }

}

The Django version I'm using is 1.5.11. Any help would be very much appreciated! 

Thanks!

Lianghong

[Lianghong Xu]

Hi,

I'm new to django. I would like to use MongoDB as my backend engine and installed all required packages for a MongoDB setup. However, when I run "python manage.py syncdb", I get the following error message:

(mywiki)lianghon@172-19-151-114:~/repo/mywiki/testwiki$ python manage.py syncdb

Traceback (most recent call last):

  File "manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line

    utility.execute()

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 272, in fetch_command

    klass = load_command_class(app_name, subcommand)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 75, in load_command_class

    module = import_module('%s.management.commands.%s' % (app_name, name))

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/django/utils/importlib.py", line 40, in import_module

    __import__(name)

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/south/management/commands/__init__.py", line 13, in <module>

    from south.management.commands.syncdb import Command as SyncCommand

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/south/management/commands/syncdb.py", line 19, in <module>

    from south.db import dbs

  File "/h/lianghon/repo/mywiki/mywiki/local/lib/python2.7/site-packages/south/db/__init__.py", line 84, in <module>

    db = dbs[DEFAULT_DB_ALIAS]

KeyError: 'default'

I've searched a lot on the Internet on this problem and most answers are like this: 

"You don't have correct DATABASES in your settings. There should be a database named 'default'"

My DATABASES settings is as follows: 

DATABASES = {

    'default': {

        'ENGINE': 'django_mongodb_engine',

        'NAME': 'wikipedia',

    }

}

I don't think there is a problem with my settings. The mongodb server on my localhost is working fine. The django version I'm using is 1.5.11. 

[James Schneider]

The version of Django you are running has not been supported for quite a while, you should update your Django installation to 1.7 or 1.8. There may be a compatibility issue if you have a new version of the plugin but an old Django installation.

You should also look to see if there is a support ticket queue for the MongoDB app you are using since Django doesn't support it out of the box. I doubt you'll get much help here for an unsupported Django version, especially since you are trying to integrate with a heavy third-party package.

-James

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[Lianghong Xu]

Hi,

I was able to fix the problem by applying the patch here:

https://bitbucket.org/andrewgodwin/south/pull-requests/86/fixing-the-keyerror-default-when-managerpy/diff

Thanks,

Lianghong