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# Copyright 2012 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Model for the metadata server.
DO NOT add new models to this module. Add them to the package as separate
modules, but import them here and add them to `__all__`.
"""
from __future__ import (
absolute_import,
print_function,
unicode_literals,
)
__metaclass__ = type
__all__ = [
'NodeCommissionResult',
'NodeKey',
'NodeUserData',
]
from django.db.models import (
CharField,
ForeignKey,
Manager,
Model,
)
from django.shortcuts import get_object_or_404
from maasserver.models import Node
from maasserver.models.cleansave import CleanSave
from maasserver.utils import ignore_unused
from metadataserver import DefaultMeta
from metadataserver.models.nodekey import NodeKey
from metadataserver.models.nodeuserdata import NodeUserData
ignore_unused(NodeKey, NodeUserData)
class NodeCommissionResultManager(Manager):
# Scheduled for model migration on 2012-07-09
"""Utility to manage a collection of :class:`NodeCommissionResult`s."""
def clear_results(self, node):
"""Remove all existing results for a node."""
self.filter(node=node).delete()
def store_data(self, node, name, data):
"""Store data about a node."""
existing, created = self.get_or_create(
node=node, name=name, defaults=dict(data=data))
if not created:
existing.data = data
existing.save()
def get_data(self, node, name):
"""Get data about a node."""
ncr = get_object_or_404(NodeCommissionResult, node=node, name=name)
return ncr.data
# Scheduled for model migration on 2012-07-09
class NodeCommissionResult(CleanSave, Model):
"""Storage for data returned from node commissioning.
Commissioning a node results in various bits of data that need to be
stored, such as lshw output. This model allows storing of this data
as unicode text, with an arbitrary name, for later retrieval.
:ivar node: The context :class:`Node`.
:ivar name: A unique name to use for the data being stored.
:ivar data: The file's actual data, unicode only.
"""
class Meta(DefaultMeta):
unique_together = ('node', 'name')
objects = NodeCommissionResultManager()
node = ForeignKey(
'maasserver.Node', null=False, editable=False, unique=False)
name = CharField(max_length=100, unique=False, editable=False)
data = CharField(max_length=1024 * 1024, editable=True)
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