self._meta should be a *ResourceOptions* object; by default, object_class is None. The above stack trace shows what happens. 

From *resources.py*:
```
class ResourceOptions(object):
    """
    A configuration class for ``Resource``.

    Provides sane defaults and the logic needed to augment these settings with
    the internal ``class Meta`` used on ``Resource`` subclasses.
    """
    serializer = Serializer()
    authentication = Authentication()
    authorization = ReadOnlyAuthorization()
    cache = NoCache()
    throttle = BaseThrottle()
    validation = Validation()
    paginator_class = Paginator
    allowed_methods = ['get', 'post', 'put', 'delete', 'patch']
    list_allowed_methods = None
    detail_allowed_methods = None
    limit = getattr(settings, 'API_LIMIT_PER_PAGE', 20)
    max_limit = 1000
    api_name = None
    resource_name = None
    urlconf_namespace = None
    default_format = 'application/json'
    filtering = {}
    ordering = []
    object_class = None
```