Django+DRF 实战：自定义异常处理流程

# rest_framework.views.py
def exception_handler(exc, context):
    if isinstance(exc, Http404):
        exc = exceptions.NotFound(*(exc.args))
    elif isinstance(exc, PermissionDenied):
        exc = exceptions.PermissionDenied(*(exc.args))

    if isinstance(exc, exceptions.APIException):
        headers = {}
        if getattr(exc, 'auth_header', None):
            headers['WWW-Authenticate'] = exc.auth_header
        if getattr(exc, 'wait', None):
            headers['Retry-After'] = '%d' % exc.wait

        if isinstance(exc.detail, (list, dict)):
            data = exc.detail
        else:
            data = {'detail': exc.detail}

        set_rollback()
        return Response(data, status=exc.status_code, headers=headers)

    return None

REST_FRAMEWORK = {
    # ...
    # 全局异常处理
    "EXCEPTION_HANDLER": "mars_framework.exceptions.base.custom_exception_handler",
    # ...
}