[HELP WANTED]Connection fails with `no attribute 'DatabaseWrapper'` error

[eunos-1128]

I tried to connect to DB using mongoengine in my project utilizing Django REST framework(so also with mongoengine-rest-framework)

But it always fail for no attribute 'DatabaseWrapper' error. I have no idea how to deal with it though I searched for ways.

• python==3.6.5
• Django==2.2.3
• mongoengine==0.19.1
• pymongo==3.10.1

Any help would be appreciated!

from mongoengine import connect

DATABASES = {
    'default': {
        'ENGINE': 'mongoengine',
        'ENFORCE_SCHEMA': False,
        'NAME': 'mongotest',
        'HOST': 'localhost',
        'PORT': 27017
    }
}

connect(DATABASES['default']['NAME'])

Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/utils/autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run
    autoreload.raise_last_exception()
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/utils/autoreload.py", line 77, in raise_last_exception
    raise _exception[1]
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/core/management/__init__.py", line 337, in execute
    autoreload.check_errors(django.setup)()
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/utils/autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/apps/registry.py", line 114, in populate
    app_config.import_models()
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/apps/config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/contrib/auth/models.py", line 2, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/contrib/auth/base_user.py", line 47, in <module>
    class AbstractBaseUser(models.Model):
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/db/models/base.py", line 117, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/db/models/base.py", line 321, in add_to_class
    value.contribute_to_class(cls, name)
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/db/models/options.py", line 204, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/db/__init__.py", line 28, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/home/masa_u/.pyenv/versions/3.6.5/lib/python3.6/site-packages/django/db/utils.py", line 202, in __getitem__
    conn = backend.DatabaseWrapper(db, alias)
AttributeError: module 'mongoengine.base' has no attribute 'DatabaseWrapper'

[bagerard]

This isn't a problem in MongoEngine itself, you should create the ticket it in mongoengine-rest-framework or django-mongoengine project

[eunos-1128]

OK, I consider that.