title: Why I am getting "Not Implemented Error: Database objects do not implement truth value testing or bool()." while running makemigration cmd in django
body: <p>I am trying to connect Django with MongoDB using Djongo. I have changed the Database parameter but I am getting this error <em>Not Implemented Error: Database objects do not implement truth value testing or bool().</em> when I am running makemigration command.</p>
  <p>Please can anybody explain why I am getting this error and how to resolve it?</p>
  <p>I have include settings.py file, error log and mongodb compass setup image.</p>
  <p><strong>settings.py</strong></p>
  <pre><code>&quot;&quot;&quot;
  Django settings for Chatify project.
  
  Generated by 'django-admin startproject' using Django 3.2.9.
  
  For more information on this file, see
  https://docs.djangoproject.com/en/3.2/topics/settings/
  
  For the full list of settings and their values, see
  https://docs.djangoproject.com/en/3.2/ref/settings/
  &quot;&quot;&quot;
  
  from pathlib import Path
  
  # Build paths inside the project like this: BASE_DIR / 'subdir'.
  BASE_DIR = Path(__file__).resolve().parent.parent
  
  
  # Quick-start development settings - unsuitable for production
  # See https://docs.djangoproject.com/en/3.2/howto/deployment/checklist/
  
  # SECURITY WARNING: keep the secret key used in production secret!
  SECRET_KEY = 'django-insecure-1k4mo05el_0112guspx^004n-i&amp;3h#u4gyev#27u)tkb8t82_%'
  
  # SECURITY WARNING: don't run with debug turned on in production!
  DEBUG = True
  
  ALLOWED_HOSTS = []
  
  
  # Application definition
  
  INSTALLED_APPS = [
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'api.apps.ApiConfig',
  ]
  
  MIDDLEWARE = [
      'django.middleware.security.SecurityMiddleware',
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.common.CommonMiddleware',
      'django.middleware.csrf.CsrfViewMiddleware',
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      'django.middleware.clickjacking.XFrameOptionsMiddleware',
  ]
  
  ROOT_URLCONF = 'Chatify.urls'
  
  TEMPLATES = [
      {
          'BACKEND': 'django.template.backends.django.DjangoTemplates',
          'DIRS': [],
          'APP_DIRS': True,
          'OPTIONS': {
              'context_processors': [
                  'django.template.context_processors.debug',
                  'django.template.context_processors.request',
                  'django.contrib.auth.context_processors.auth',
                  'django.contrib.messages.context_processors.messages',
              ],
          },
      },
  ]
  
  WSGI_APPLICATION = 'Chatify.wsgi.application'
  
  
  # Database
  # https://docs.djangoproject.com/en/3.2/ref/settings/#databases
  
  # DATABASES = {
  #     'default': {
  #         'ENGINE': 'django.db.backends.sqlite3',
  #         'NAME': BASE_DIR / 'db.sqlite3',
  #     }
  # }
  DATABASES = {
         'default': {
             'ENGINE': 'djongo',
             'NAME': 'users',
         }
  }
  
  
  # Password validation
  # https://docs.djangoproject.com/en/3.2/ref/settings/#auth-password-validators
  
  AUTH_PASSWORD_VALIDATORS = [
      {
          'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
      },
      {
          'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
      },
      {
          'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
      },
      {
          'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
      },
  ]
  
  
  # Internationalization
  # https://docs.djangoproject.com/en/3.2/topics/i18n/
  
  LANGUAGE_CODE = 'en-us'
  
  TIME_ZONE = 'UTC'
  
  USE_I18N = True
  
  USE_L10N = True
  
  USE_TZ = True
  
  
  # Static files (CSS, JavaScript, Images)
  # https://docs.djangoproject.com/en/3.2/howto/static-files/
  
  STATIC_URL = '/static/'
  
  # Default primary key field type
  # https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field
  
  DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
  
  
  </code></pre>
  <p><strong>Error Log</strong></p>
  <pre><code>File &quot;manage.py&quot;, line 22, in &lt;module&gt;
      main()
    File &quot;manage.py&quot;, line 18, in main
      execute_from_command_line(sys.argv)
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management\__init__.py&quot;, line 419, in execute_from_command_line
      utility.execute()
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management\__init__.py&quot;, line 413, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\django\core\management\base.py&quot;, line 367, in run_from_argv
      connections.close_all()
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\utils.py&quot;, line 213, in close_all
      connection.close()
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\django\utils\asyncio.py&quot;, line 33, in inner
      return func(*args, **kwargs)
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\django\db\backends\base\base.py&quot;, line 294, in close
      self._close()
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\djongo\base.py&quot;, line 208, in _close
      if self.connection:
    File &quot;C:\Users\DELL\AppData\Local\Programs\Python\Python37\lib\site-packages\pymongo\database.py&quot;, line 829, in __bool__
      raise NotImplementedError(&quot;Database objects do not implement truth &quot;
  NotImplementedError: Database objects do not implement truth value testing or bool(). Please compare with None instead: database is not None
  </code></pre>
  <p><strong>MongoDBCompass</strong>
  <a href="https://i.stack.imgur.com/OSNPV.png" rel="noreferrer">MongoDB Local Database Image</a></p>