将Vertica作为Django应用数据库后端遇加载错误，求解决方案

I’ve run into this exact import issue when using the third-party Vertica backend for Django, so let’s walk through the most common fixes:

• Reinstall the backend library properly
  Half the time, this error comes from a partial or corrupted installation. Try wiping the existing install and reinstalling with force:

  pip uninstall django_vertica_backend -y
  pip install django_vertica_backend --force-reinstall
  

  Also double-check that your Django and Python versions are compatible with the library—older versions like Python 3.6 might have compatibility gaps, so consider upgrading to 3.8+ if possible.

• Verify your DATABASES configuration
  Make sure your settings.py uses the correct ENGINE value (this is a super common mistake):

  DATABASES = {
      'default': {
          'ENGINE': 'django_vertica_backend',
          'NAME': 'your_db_name',
          'USER': 'your_username',
          'PASSWORD': 'your_password',
          'HOST': 'vertica_server_host',
          'PORT': '5433',  # Don't mix this up with other DB ports!
      }
  }
  

  If you accidentally set ENGINE to something like django_vertica_backend.base, Django will fail to resolve the module correctly.

• Install required database drivers
  The backend relies on either vertica-python or pyodbc to connect to Vertica. Install the appropriate driver based on your setup:

  # For vertica-python
  pip install vertica-python
  
  # For pyodbc (you'll also need system-level Vertica ODBC drivers installed)
  pip install pyodbc
  

  Missing drivers can sometimes cause indirect import failures, even if the traceback points to the backend module itself.

• Check the library's directory structure
  From your traceback, Django is looking for django_vertica_backend.base but can’t find it. Navigate to your Python site-packages folder and check if the django_vertica_backend directory contains a base.py file. If it’s missing, the installation is broken—try installing from the library's source code directly instead of PyPI:

  # Download the library source code to your local directory first
  cd django_vertica_backend
  pip install -e .
  

If none of these steps work, check the library’s issue tracker for similar problems—other users might have reported fixes for your specific Django/Python/Vertica version combo.

内容的提问来源于stack exchange，提问作者Rishabh K Sharma