本文整理汇总了Python中HydraServer.db.DBSession.expunge方法的典型用法代码示例。如果您正苦于以下问题：Python DBSession.expunge方法的具体用法？Python DBSession.expunge怎么用？Python DBSession.expunge使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类HydraServer.db.DBSession的用法示例。
在下文中一共展示了DBSession.expunge方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: get_attribute_data
# 需要导入模块: from HydraServer.db import DBSession [as 别名]
# 或者: from HydraServer.db.DBSession import expunge [as 别名]
def get_attribute_data(attr_ids, node_ids, **kwargs):
"""
For a given attribute or set of attributes, return all the resources and
resource scenarios in the network
"""
node_attrs = DBSession.query(ResourceAttr).\
options(joinedload_all('attr')).\
filter(ResourceAttr.node_id.in_(node_ids),
ResourceAttr.attr_id.in_(attr_ids)).all()
ra_ids = []
for ra in node_attrs:
ra_ids.append(ra.resource_attr_id)
resource_scenarios = DBSession.query(ResourceScenario).filter(ResourceScenario.resource_attr_id.in_(ra_ids)).options(joinedload('resourceattr')).options(joinedload_all('dataset.metadata')).order_by(ResourceScenario.scenario_id).all()
for rs in resource_scenarios:
if rs.dataset.hidden == 'Y':
try:
rs.dataset.check_read_permission(kwargs.get('user_id'))
except:
rs.dataset.value = None
rs.dataset.frequency = None
rs.dataset.start_time = None
DBSession.expunge(rs)
return node_attrs, resource_scenarios示例2: clone_dataset
# 需要导入模块: from HydraServer.db import DBSession [as 别名]
# 或者: from HydraServer.db.DBSession import expunge [as 别名]
def clone_dataset(dataset_id,**kwargs):
"""
Get a single dataset, by ID
"""
user_id = int(kwargs.get('user_id'))
if dataset_id is None:
return None
dataset = DBSession.query(Dataset).filter(
Dataset.dataset_id==dataset_id).options(joinedload_all('metadata')).first()
if dataset is None:
raise HydraError("Dataset %s does not exist."%(dataset_id))
if dataset is not None and dataset.created_by != user_id:
owner = DBSession.query(DatasetOwner).filter(
DatasetOwner.dataset_id==Dataset.dataset_id,
DatasetOwner.user_id==user_id).first()
if owner is None:
raise PermissionError("User %s is not an owner of dataset %s and therefore cannot clone it."%(user_id, dataset_id))
DBSession.expunge(dataset)
make_transient(dataset)
dataset.data_name = dataset.data_name + "(Clone)"
dataset.dataset_id = None
dataset.cr_date = None
#Try to avoid duplicate metadata entries if the entry has been cloned previously
for m in dataset.metadata:
if m.metadata_name in ("clone_of", "cloned_by"):
del(m)
cloned_meta = Metadata()
cloned_meta.metadata_name = "clone_of"
cloned_meta.metadata_val = str(dataset_id)
dataset.metadata.append(cloned_meta)
cloned_meta = Metadata()
cloned_meta.metadata_name = "cloned_by"
cloned_meta.metadata_val = str(user_id)
dataset.metadata.append(cloned_meta)
dataset.set_hash()
DBSession.add(dataset)
DBSession.flush()
cloned_dataset = DBSession.query(Dataset).filter(
Dataset.dataset_id==dataset.dataset_id).first()
return cloned_dataset