Error Handling

[Navneet Pandey]

Hello, I am having trouble with error handling.

The stack trace and web searches show that the following class location:
"pymongo.errors.DuplicateKeyError" or "pymongo.errors.WriteError"

But, when I am using this, the application is giving me the following error:
"TypeError: catching classes that do not inherit from BaseException is not allowed"

I have tried using

try:
// code
except mongo.errors.DuplicateKeyError
except mongo.db.errors.DuplicateKeyError
except mongo.cx.errors.DuplicateKeyError
except mongo.errors.DuplicateKeyError

(where mongo is instantiated correctly in the app. I am able to write to the database.)

I would really appreciate any help regarding this issue. Thank you.

[Dan Crosta]

You'll need to import and use the Exception from pymongo itself, not from the mongo object that's created by Flask-PyMongo. Try:

from pymongo.errors import DuplicateKeyError

# later
try:
    # ...
except DuplicateKeyError as dke:
    # handle the exception

[Navneet Pandey]

@dcrosta thank you for the response.