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# Copyright 2011 OpenStack Foundation
#
# 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 oslo_log import log as logging
from oslo_utils import strutils
from trove.common import exception
from trove.common.i18n import _
from trove.common import models
from trove.common import pagination
from trove.common import timeutils
from trove.common import utils
from trove.db import db_query
from trove.db import get_db_api
LOG = logging.getLogger(__name__)
class DatabaseModelBase(models.ModelBase):
_auto_generated_attrs = ['id']
@classmethod
def create(cls, **values):
init_vals = {
'id': utils.generate_uuid(),
'created': timeutils.utcnow(),
}
if hasattr(cls, 'deleted'):
init_vals['deleted'] = False
init_vals.update(values)
instance = cls(**init_vals)
if not instance.is_valid():
raise exception.InvalidModelError(errors=instance.errors)
return instance.save()
@property
def db_api(self):
return get_db_api()
@property
def preserve_on_delete(self):
return hasattr(self, 'deleted') and hasattr(self, 'deleted_at')
@classmethod
def query(cls):
return get_db_api()._base_query(cls)
def save(self):
if not self.is_valid():
raise exception.InvalidModelError(errors=self.errors)
self['updated'] = timeutils.utcnow()
LOG.debug("Saving %(name)s: %(dict)s",
{'name': self.__class__.__name__,
'dict': strutils.mask_dict_password(self.__dict__)})
return self.db_api.save(self)
def delete(self):
self['updated'] = timeutils.utcnow()
LOG.debug("Deleting %(name)s: %(dict)s",
{'name': self.__class__.__name__,
'dict': strutils.mask_dict_password(self.__dict__)})
if self.preserve_on_delete:
self['deleted_at'] = timeutils.utcnow()
self['deleted'] = True
return self.db_api.save(self)
else:
return self.db_api.delete(self)
def update(self, **values):
for key in values:
if hasattr(self, key):
setattr(self, key, values[key])
self['updated'] = timeutils.utcnow()
return self.db_api.save(self)
def __init__(self, **kwargs):
self.merge_attributes(kwargs)
if not self.is_valid():
raise exception.InvalidModelError(errors=self.errors)
def merge_attributes(self, values):
"""dict.update() behaviour."""
for k, v in values.items():
self[k] = v
@classmethod
def find_by(cls, context=None, **conditions):
model = cls.get_by(**conditions)
if model is None:
raise exception.ModelNotFoundError(_("%(s_name)s Not Found") %
{"s_name": cls.__name__})
if ((context and not context.is_admin and hasattr(model, 'tenant_id')
and model.tenant_id != context.project_id)):
log_fmt = ("Tenant %(s_tenant)s tried to access "
"%(s_name)s, owned by %(s_owner)s.")
exc_fmt = _("Tenant %(s_tenant)s tried to access "
"%(s_name)s, owned by %(s_owner)s.")
msg_content = {
"s_tenant": context.project_id,
"s_name": cls.__name__,
"s_owner": model.tenant_id}
LOG.error(log_fmt, msg_content)
raise exception.ModelNotFoundError(exc_fmt % msg_content)
return model
@classmethod
def find_by_filter(cls, **kwargs):
return db_query.find_by_filter(cls, **cls._process_conditions(kwargs))
@classmethod
def get_by(cls, **kwargs):
return get_db_api().find_by(cls, **cls._process_conditions(kwargs))
@classmethod
def find_all(cls, **kwargs):
return db_query.find_all(cls, **cls._process_conditions(kwargs))
@classmethod
def _process_conditions(cls, raw_conditions):
"""Override in inheritors to format/modify any conditions."""
return raw_conditions
@classmethod
def find_by_pagination(cls, collection_type, collection_query,
paginated_url, **kwargs):
elements, next_marker = collection_query.paginated_collection(**kwargs)
return pagination.PaginatedDataView(collection_type,
elements,
paginated_url,
next_marker)
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