Source code for ironic.api.controllers.v1.collection
# 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.
from wsme import types as wtypes
from ironic import api
from ironic.api.controllers import base
from ironic.api.controllers import link
[docs]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)
[docs] @classmethod
def get_key_field(cls):
return 'uuid'
[docs] def has_next(self, limit):
"""Return whether collection has more items."""
return len(self.collection) and len(self.collection) == limit
[docs] 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
fields = kwargs.pop('fields', None)
# NOTE(saga): If fields argument is present in kwargs and not None. It
# is a list so convert it into a comma seperated string.
if fields:
kwargs['fields'] = ','.join(fields)
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': getattr(self.collection[-1], self.get_key_field())}
return link.Link.make_link('next', api.request.public_url,
resource_url, next_args).href