2428d78a15
The Glance API supports a sort direction which we can use to paginate back The Prev href tag contains a marker id of the first item in the table. When clicked, a GET API call is made, passing in this marker and the sort_dir='asc' This will return the previous page's data. Then we have to re-sort the data because it is ordered backwards. We use the default sort_key='created_by' for this. Once the patch #1252649 is restored, we can add the same behavior to Project > Images. If we are able to get the consistency across the APIs to include the sort_dir, then we can bring Prev to the other project tables as well. There are some blueprints to enhance API capabilities in this area. Change-Id: I3e7c6a2db595838dbdff595dc8f0fdda288b6bcf Partial-Bug: #1263142 Partial-Bug: #1282987 Partially-implements: blueprint pagination-add-prev-link
124 lines
4.0 KiB
Python
124 lines
4.0 KiB
Python
# Copyright 2012 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Copyright 2012 Nebula, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from __future__ import absolute_import
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import itertools
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import logging
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import thread
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from django.conf import settings
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import glanceclient as glance_client
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from horizon.utils import functions as utils
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from openstack_dashboard.api import base
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LOG = logging.getLogger(__name__)
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def glanceclient(request):
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url = base.url_for(request, 'image')
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insecure = getattr(settings, 'OPENSTACK_SSL_NO_VERIFY', False)
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cacert = getattr(settings, 'OPENSTACK_SSL_CACERT', None)
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LOG.debug('glanceclient connection created using token "%s" and url "%s"'
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% (request.user.token.id, url))
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return glance_client.Client('1', url, token=request.user.token.id,
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insecure=insecure, cacert=cacert)
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def image_delete(request, image_id):
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return glanceclient(request).images.delete(image_id)
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def image_get(request, image_id):
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"""Returns an Image object populated with metadata for image
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with supplied identifier.
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"""
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image = glanceclient(request).images.get(image_id)
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if not hasattr(image, 'name'):
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image.name = None
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return image
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def image_list_detailed(request, marker=None, sort_dir='desc',
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sort_key='created_at', filters=None, paginate=False):
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limit = getattr(settings, 'API_RESULT_LIMIT', 1000)
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page_size = utils.get_page_size(request)
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if paginate:
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request_size = page_size + 1
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else:
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request_size = limit
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kwargs = {'filters': filters or {}}
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if marker:
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kwargs['marker'] = marker
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kwargs['sort_dir'] = sort_dir
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kwargs['sort_key'] = sort_key
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images_iter = glanceclient(request).images.list(page_size=request_size,
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limit=limit,
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**kwargs)
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has_prev_data = False
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has_more_data = False
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if paginate:
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images = list(itertools.islice(images_iter, request_size))
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# first and middle page condition
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if len(images) > page_size:
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images.pop(-1)
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has_more_data = True
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# middle page condition
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if marker is not None:
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has_prev_data = True
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# first page condition when reached via prev back
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elif sort_dir == 'asc' and marker is not None:
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has_more_data = True
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# last page condition
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elif marker is not None:
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has_prev_data = True
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else:
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images = list(images_iter)
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return (images, has_more_data, has_prev_data)
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def image_update(request, image_id, **kwargs):
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return glanceclient(request).images.update(image_id, **kwargs)
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def image_create(request, **kwargs):
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copy_from = kwargs.pop('copy_from', None)
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data = kwargs.pop('data', None)
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image = glanceclient(request).images.create(**kwargs)
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if data:
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thread.start_new_thread(image_update,
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(request, image.id),
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{'data': data,
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'purge_props': False})
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elif copy_from:
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thread.start_new_thread(image_update,
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(request, image.id),
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{'copy_from': copy_from,
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'purge_props': False})
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return image
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