How to Handle MultiValueDictKeyError in Django When a Checkbox is Unchecked?

Troubleshooting Django's MultiValueDictKeyError: Handling Checkbox Exception

When attempting to save an object to the database, a MultiValueDictKeyError error may arise due to missing checkbox values in a form. In this scenario, the is_private checkbox, when unchecked, does not provide a value, resulting in the error.

Resolution:

To handle this error gracefully, the MultiValueDict's get method should be employed instead of accessing values directly. The get method, which is also available in standard dictionaries, allows for fetching a value while specifying a default value if the key does not exist.

In the given line of code:

is_private = request.POST['is_private']

should be replaced with:

is_private = request.POST.get('is_private', False)

By setting a default value of False, when the checkbox is not selected, its value will default to False, preventing the error from occurring.

The general syntax for using get is:

my_var = dict.get(<key>, <default>)

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