本文整理汇总了Python中cms.db.Session.expire_all方法的典型用法代码示例。如果您正苦于以下问题：Python Session.expire_all方法的具体用法？Python Session.expire_all怎么用？Python Session.expire_all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cms.db.Session的用法示例。
在下文中一共展示了Session.expire_all方法的3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: CommonRequestHandler
# 需要导入模块: from cms.db import Session [as 别名]
# 或者: from cms.db.Session import expire_all [as 别名]
class CommonRequestHandler(RequestHandler):
"""Encapsulates shared RequestHandler functionality.
"""
# Whether the login cookie duration has to be refreshed when
# this handler is called. Useful to filter asynchronous
# requests.
refresh_cookie = True
def __init__(self, *args, **kwargs):
super(CommonRequestHandler, self).__init__(*args, **kwargs)
self.timestamp = None
self.sql_session = None
self.r_params = None
self.contest = None
self.url = None
def prepare(self):
"""This method is executed at the beginning of each request.
"""
super(CommonRequestHandler, self).prepare()
self.timestamp = make_datetime()
self.set_header("Cache-Control", "no-cache, must-revalidate")
self.sql_session = Session()
self.sql_session.expire_all()
self.url = create_url_builder(get_url_root(self.request.path))
@property
def service(self):
return self.application.service示例2: CommonRequestHandler
# 需要导入模块: from cms.db import Session [as 别名]
# 或者: from cms.db.Session import expire_all [as 别名]
class CommonRequestHandler(RequestHandler):
"""Encapsulates shared RequestHandler functionality.
"""
# Whether the login cookie duration has to be refreshed when
# this handler is called. Useful to filter asynchronous
# requests.
refresh_cookie = True
def __init__(self, *args, **kwargs):
super(CommonRequestHandler, self).__init__(*args, **kwargs)
self.timestamp = None
self.sql_session = None
self.r_params = None
self.contest = None
def prepare(self):
"""This method is executed at the beginning of each request.
"""
super(CommonRequestHandler, self).prepare()
self.timestamp = make_datetime()
self.set_header("Cache-Control", "no-cache, must-revalidate")
self.sql_session = Session()
self.sql_session.expire_all()
@property
def service(self):
return self.application.service
def redirect(self, url):
url = get_url_root(self.request.path) + url
# We would prefer to just use this:
# tornado.web.RequestHandler.redirect(self, url)
# but unfortunately that assumes it knows the full path to the current
# page to generate an absolute URL. This may not be the case if we are
# hidden behind a proxy which is remapping part of its URL space to us.
self.set_status(302)
self.set_header("Location", url)
self.finish()示例3: BaseHandler
# 需要导入模块: from cms.db import Session [as 别名]
# 或者: from cms.db.Session import expire_all [as 别名]
class BaseHandler(CommonRequestHandler):
"""Base RequestHandler for this application.
All the RequestHandler classes in this application should be a
child of this class.
"""
def try_commit(self):
"""Try to commit the current session.
If not successful display a warning in the webpage.
return (bool): True if commit was successful, False otherwise.
"""
try:
self.sql_session.commit()
except IntegrityError as error:
self.application.service.add_notification(
make_datetime(),
"Operation failed.", "%s" % error)
return False
else:
self.application.service.add_notification(
make_datetime(),
"Operation successful.", "")
return True
def safe_get_item(self, cls, ident, session=None):
"""Get item from database of class cls and id ident, using
session if given, or self.sql_session if not given. If id is
not found, raise a 404.
cls (type): class of object to retrieve.
ident (string): id of object.
session (Session|None): session to use.
return (object): the object with the given id.
raise (HTTPError): 404 if not found.
"""
if session is None:
session = self.sql_session
entity = cls.get_from_id(ident, session)
if entity is None:
raise tornado.web.HTTPError(404)
return entity
def prepare(self):
"""This method is executed at the beginning of each request.
"""
# Attempt to update the contest and all its references
# If this fails, the request terminates.
self.set_header("Cache-Control", "no-cache, must-revalidate")
self.sql_session = Session()
self.sql_session.expire_all()
self.contest = None
def render_params(self):
"""Return the default render params used by almost all handlers.
return (dict): default render params
"""
params = {}
params["timestamp"] = make_datetime()
params["contest"] = self.contest
params["url_root"] = get_url_root(self.request.path)
if self.contest is not None:
params["phase"] = self.contest.phase(params["timestamp"])
# Keep "== None" in filter arguments. SQLAlchemy does not
# understand "is None".
params["unanswered"] = self.sql_session.query(Question)\
.join(Participation)\
.filter(Participation.contest_id == self.contest.id)\
.filter(Question.reply_timestamp == None)\
.filter(Question.ignored == False)\
.count() # noqa
# TODO: not all pages require all these data.
params["contest_list"] = self.sql_session.query(Contest).all()
params["task_list"] = self.sql_session.query(Task).all()
params["user_list"] = self.sql_session.query(User).all()
return params
def finish(self, *args, **kwds):
"""Finish this response, ending the HTTP request.
We override this method in order to properly close the database.
TODO - Now that we have greenlet support, this method could be
refactored in terms of context manager or something like
that. So far I'm leaving it to minimize changes.
"""
self.sql_session.close()
try:
#.........这里部分代码省略.........