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#!/usr/bin/env python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2013 Red Hat, Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import pecan
from wsme import types as wtypes
from ironic.api.controllers.v1 import base
from ironic.api.controllers.v1 import link
class Collection(base.APIBase):
next = wtypes.text
"A link to retrieve the next subset of the collection"
@property
def collection(self):
return getattr(self, self._type)
def has_next(self, limit):
"""Return whether collection has more items."""
return len(self.collection) and len(self.collection) == limit
def get_next(self, limit, url=None, **kwargs):
"""Return a link to the next subset of the collection."""
if not self.has_next(limit):
return wtypes.Unset
resource_url = url or self._type
q_args = ''.join(['%s=%s&' % (key, kwargs[key]) for key in kwargs])
next_args = '?%(args)slimit=%(limit)d&marker=%(marker)s' % {
'args': q_args, 'limit': limit,
'marker': self.collection[-1].uuid}
return link.Link.make_link('next', pecan.request.host_url,
resource_url, next_args).href
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