Custom exception handler for Django Rest Framework that adds the `status_code` to the response and renames the `detail` key to `error`.

exceptions.py

from rest_framework.views import exception_handler


def custom_exception_handler(exc):
    """
    Custom exception handler for Django Rest Framework that adds
    the `status_code` to the response and renames the `detail` key to `error`.
    """
    response = exception_handler(exc)

    if response is not None:
        response.data['status_code'] = response.status_code
        response.data['error'] = response.data['detail']
        del response.data['detail']

    return response

Worth noting that the custom exception handler has to be activated in the settings.