def init(connection_uri, echo=False, scopefunc=None):
"""Initialize the session.
Args:
connection_uri (str): The connection uri, such as
"postgrseql://*****:*****@localhost/dbname"
echo (bool): Echo SQL statements to stdout. Useful for debugging.
scopefunc (func): Optional function which defines
the current scope. See
http://docs.sqlalchemy.org/en/latest/orm/contextual.html#sqlalchemy.orm.scoping.scoped_session.__init__
for more information. If this is not passed, the "thread-local"
scope will be assumed.
"""
global engine, session
from frf.models import Model
if 'postgres' in connection_uri:
engine = create_engine(connection_uri,
echo=echo,
json_serializer=serialize,
json_deserializer=deserialize)
else:
engine = create_engine(connection_uri, echo=echo)
if scopefunc is not None:
session.registry = ScopedRegistry(session.session_factory,
scopefunc=scopefunc)
else:
session.registry = ThreadLocalRegistry(session.session_factory)
session.configure(bind=engine)
Model.query = _QueryProperty(session)
def __init__(self, session_factory, scopefunc=None):
self.session_factory = session_factory
if scopefunc:
self.registry = ScopedRegistry(session_factory, scopefunc)
else:
self.registry = ThreadLocalRegistry(session_factory)
self.extension = _ScopedExt(self)
def __init__(self, session_factory, scopefunc=None):
"""Construct a new :class:`.scoped_session`.
:param session_factory: a factory to create new :class:`.Session`
instances. This is usually, but not necessarily, an instance
of :class:`.sessionmaker`.
:param scopefunc: optional function which defines
the current scope. If not passed, the :class:`.scoped_session`
object assumes "thread-local" scope, and will use
a Python ``threading.local()`` in order to maintain the current
:class:`.Session`. If passed, the function should return
a hashable token; this token will be used as the key in a
dictionary in order to store and retrieve the current
:class:`.Session`.
"""
self.session_factory = session_factory
if scopefunc:
self.registry = ScopedRegistry(session_factory, scopefunc)
else:
self.registry = ThreadLocalRegistry(session_factory)
def __init__(self, session_factory):
self._session_factory = session_factory
self._registry = ThreadLocalRegistry(session_factory)
