处理来自Python包的未处理异常

Question

I have successfully incorporated my Wordpress blog into my Django app through the-real-django-wordpress Python package ( Github ).

The only things I needed to do were to:

• add the Wordpress database credentials to the Django settings,
• include the URLconf of the package into urls.py ,
• override the package templates in order to display the posts the way I want.

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If however the Wordpress database happens to be offline, I get a Python exception.

OperationalError: (2003, "Can't connect to MySQL server on '10.0.2.2' (110)")

The Python code being part of the package, and thus not in my code, where should I then handle the exception in order to display an error message?

Answer 1

Why not have your 500.html template simply display the error message you want?

Otherwise, you could create a middleware to catch this error:

from django.shortcuts import render

class CatchOperationalError(object):
    def process_exception(self, request, exception):
        if type(exception).__name__ == 'OperationalError':  # replace with proper isinstance
            return render(request, 'wordpress_down.html')

https://docs.djangoproject.com/en/dev/topics/http/middleware/#process_exception

Another option would be to wrap each individual view in a try/except.