set dataset quota by FreeNas API

resources.py

class DatasetResource(DojoResource):
    # ...other functions
    def obj_create(self, bundle, **kwargs):
        bundle = self.full_hydrate(bundle)
        props = None
        dataset_quota = bundle.data.get('quota')
        if dataset_quota:
            props = {
                'casesensitivity':'sensitive',
                'compression':'inherit',
                'atime':'inherit',
                'quota':dataset_quota.__str__()
                }
        err, msg = notifier().create_zfs_dataset(
            path='%s/%s' % (kwargs.get('parent').vol_name, bundle.data.get('name')),
            props=props)
        if err != 0:
            bundle.errors['__all__'] = msg
            raise ImmediateHttpResponse(
                response=self.error_response(bundle.request, bundle.errors)
                )
        else:
            notifier().dataset_init_unix('%s/%s' % (kwargs.get('parent').vol_name,bundle.data.get('name')))
        # FIXME: authorization
        bundle.obj = self.obj_get(bundle, pk=bundle.data.get('name'), **kwargs)
        return bundle

F*ng awesome, you best!