What are some common exceptions in Django and how can I handle them?

What are some common exceptions I might encounter in Django?

Some common exceptions in Django include DoesNotExist, MultipleObjectsReturned, and ValidationError. Each of these indicates different issues, such as querying a non-existent object or validating data.

How can I handle the DoesNotExist exception?

You can handle the DoesNotExist exception using a try-except block. For example:

from django.core.exceptions import ObjectDoesNotExist

try:
    obj = MyModel.objects.get(id=1)
except ObjectDoesNotExist:
    # Handle the exception, e.g., return a 404 response

What about ValidationError? How should I manage that?

For ValidationError, you can catch it during form validation. Here's an example:

from django.core.exceptions import ValidationError

try:
    form.is_valid()
except ValidationError as e:
    # Handle the validation error, e.g., return form errors to the user

Are there best practices for handling exceptions in Django?

Yes, best practices include logging exceptions, using custom error views, and providing user-friendly error messages.