我认为最好定义自定义的异常处理程序,例如:
settings.py
REST_FRAMEWORK = {
'EXCEPTION_HANDLER': 'myproject.common.custom_classes.handler.exception_handler',
}
handler.py
def exception_handler(exc, context):
if isinstance(exc, UniqueEmailException):
set_rollback()
data = {'detail': exc.detail}
return Response(data, status=exc.status_code)
elif isinstance(exc, (exceptions.APIException, ValidationError)):
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 hasattr(exc, 'error_dict') and isinstance(exc, ValidationError):
exc.status_code = HTTP_400_BAD_REQUEST
data = exc.message_dict
elif isinstance(exc.detail, (list, dict)):
data = exc.detail
else:
data = {'detail': exc.detail}
set_rollback()
return Response(data, status=exc.status_code, headers=headers)
elif isinstance(exc, Http404):
msg = _('Not found.')
data = {'detail': six.text_type(msg)}
set_rollback()
return Response(data, status=status.HTTP_404_NOT_FOUND)
return None
exceptions.py
class UniqueEmailException(APIException):
status_code = status.HTTP_409_CONFLICT
default_detail = 'Error Message'
最后是验证器:
def validate_email(self, value):
if value is not None:
exist_email = User.objects.filter(email=value).first()
if exist_email:
raise UniqueEmailException()
return value