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📁 ..
📄 __init__.py(7.9 KB)
📄 __init__.pyc(9.31 KB)
📄 __init__.pyo(9.31 KB)
📄 attributes.py(55.94 KB)
📄 attributes.pyc(55.59 KB)
📄 attributes.pyo(55.32 KB)
📄 base.py(14.32 KB)
📄 base.pyc(15.11 KB)
📄 base.pyo(15.11 KB)
📄 collections.py(51.18 KB)
📄 collections.pyc(62.31 KB)
📄 collections.pyo(62.1 KB)
📄 dependency.py(45.11 KB)
📄 dependency.pyc(28.68 KB)
📄 dependency.pyo(28.59 KB)
📄 deprecated_interfaces.py(17.83 KB)
📄 deprecated_interfaces.pyc(21.11 KB)
📄 deprecated_interfaces.pyo(21.11 KB)
📄 descriptor_props.py(24.95 KB)
📄 descriptor_props.pyc(28.1 KB)
📄 descriptor_props.pyo(28.1 KB)
📄 dynamic.py(12.84 KB)
📄 dynamic.pyc(14.42 KB)
📄 dynamic.pyo(14.42 KB)
📄 evaluator.py(4.7 KB)
📄 evaluator.pyc(7.19 KB)
📄 evaluator.pyo(7.19 KB)
📄 events.py(83.09 KB)
📄 events.pyc(91.58 KB)
📄 events.pyo(91.58 KB)
📄 exc.py(5.31 KB)
📄 exc.pyc(7.75 KB)
📄 exc.pyo(7.75 KB)
📄 identity.py(10.01 KB)
📄 identity.pyc(14.76 KB)
📄 identity.pyo(14.76 KB)
📄 instrumentation.py(17.1 KB)
📄 instrumentation.pyc(20.65 KB)
📄 instrumentation.pyo(20.57 KB)
📄 interfaces.py(21.56 KB)
📄 interfaces.pyc(26.11 KB)
📄 interfaces.pyo(26.11 KB)
📄 loading.py(25.29 KB)
📄 loading.pyc(15.28 KB)
📄 loading.pyo(15.28 KB)
📄 mapper.py(116.54 KB)
📄 mapper.pyc(92.81 KB)
📄 mapper.pyo(92.66 KB)
📄 path_registry.py(7.57 KB)
📄 path_registry.pyc(12.58 KB)
📄 path_registry.pyo(12.58 KB)
📄 persistence.py(52.41 KB)
📄 persistence.pyc(41.25 KB)
📄 persistence.pyo(41.25 KB)
📄 properties.py(10.21 KB)
📄 properties.pyc(11.3 KB)
📄 properties.pyo(11.3 KB)
📄 query.py(150.98 KB)
📄 query.pyc(143.06 KB)
📄 query.pyo(143.02 KB)
📄 relationships.py(115.47 KB)
📄 relationships.pyc(100.36 KB)
📄 relationships.pyo(100.33 KB)
📄 scoping.py(6.27 KB)
📄 scoping.pyc(7.5 KB)
📄 scoping.pyo(7.5 KB)
📄 session.py(117.07 KB)
📄 session.pyc(110.77 KB)
📄 session.pyo(110.6 KB)
📄 state.py(26.85 KB)
📄 state.pyc(28.61 KB)
📄 state.pyo(28.61 KB)
📄 strategies.py(60.93 KB)
📄 strategies.pyc(45.88 KB)
📄 strategies.pyo(45.54 KB)
📄 strategy_options.py(35.07 KB)
📄 strategy_options.pyc(36.87 KB)
📄 strategy_options.pyo(36.87 KB)
📄 sync.py(5.32 KB)
📄 sync.pyc(4.48 KB)
📄 sync.pyo(4.48 KB)
📄 unitofwork.py(23.43 KB)
📄 unitofwork.pyc(23.57 KB)
📄 unitofwork.pyo(23.49 KB)
📄 util.py(37.64 KB)
📄 util.pyc(38.09 KB)
📄 util.pyo(37.94 KB)

Editing: scoping.py

# orm/scoping.py
# Copyright (C) 2005-2017 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php

from .. import exc as sa_exc
from ..util import ScopedRegistry, ThreadLocalRegistry, warn
from . import class_mapper, exc as orm_exc
from .session import Session

__all__ = ['scoped_session']

class scoped_session(object):
    """Provides scoped management of :class:`.Session` objects.

See :ref:`unitofwork_contextual` for a tutorial.

"""

session_factory = None
    """The `session_factory` provided to `__init__` is stored in this
    attribute and may be accessed at a later time.  This can be useful when
    a new non-scoped :class:`.Session` or :class:`.Connection` to the
    database is needed."""

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 __call__(self, **kw):
        r"""Return the current :class:`.Session`, creating it
        using the :attr:`.scoped_session.session_factory` if not present.

:param \**kw: Keyword arguments will be passed to the
         :attr:`.scoped_session.session_factory` callable, if an existing
         :class:`.Session` is not present.  If the :class:`.Session` is present
         and keyword arguments have been passed,
         :exc:`~sqlalchemy.exc.InvalidRequestError` is raised.

"""
        if kw:
            scope = kw.pop('scope', False)
            if scope is not None:
                if self.registry.has():
                    raise sa_exc.InvalidRequestError(
                        "Scoped session is already present; "
                        "no new arguments may be specified.")
                else:
                    sess = self.session_factory(**kw)
                    self.registry.set(sess)
                    return sess
            else:
                return self.session_factory(**kw)
        else:
            return self.registry()

def remove(self):
        """Dispose of the current :class:`.Session`, if present.

This will first call :meth:`.Session.close` method
        on the current :class:`.Session`, which releases any existing
        transactional/connection resources still being held; transactions
        specifically are rolled back.  The :class:`.Session` is then
        discarded.   Upon next usage within the same scope,
        the :class:`.scoped_session` will produce a new
        :class:`.Session` object.

"""

if self.registry.has():
            self.registry().close()
        self.registry.clear()

def configure(self, **kwargs):
        """reconfigure the :class:`.sessionmaker` used by this
        :class:`.scoped_session`.

See :meth:`.sessionmaker.configure`.

"""

if self.registry.has():
            warn('At least one scoped session is already present. '
                 ' configure() can not affect sessions that have '
                 'already been created.')

self.session_factory.configure(**kwargs)

def query_property(self, query_cls=None):
        """return a class property which produces a :class:`.Query` object
        against the class and the current :class:`.Session` when called.

e.g.::

Session = scoped_session(sessionmaker())

class MyClass(object):
                query = Session.query_property()

# after mappers are defined
            result = MyClass.query.filter(MyClass.name=='foo').all()

Produces instances of the session's configured query class by
        default.  To override and use a custom implementation, provide
        a ``query_cls`` callable.  The callable will be invoked with
        the class's mapper as a positional argument and a session
        keyword argument.

There is no limit to the number of query properties placed on
        a class.

"""
        class query(object):
            def __get__(s, instance, owner):
                try:
                    mapper = class_mapper(owner)
                    if mapper:
                        if query_cls:
                            # custom query class
                            return query_cls(mapper, session=self.registry())
                        else:
                            # session's configured query class
                            return self.registry().query(mapper)
                except orm_exc.UnmappedClassError:
                    return None
        return query()

ScopedSession = scoped_session
"""Old name for backwards compatibility."""

def instrument(name):
    def do(self, *args, **kwargs):
        return getattr(self.registry(), name)(*args, **kwargs)
    return do

for meth in Session.public_methods:
    setattr(scoped_session, meth, instrument(meth))

def makeprop(name):
    def set(self, attr):
        setattr(self.registry(), name, attr)

def get(self):
        return getattr(self.registry(), name)

return property(get, set)

for prop in ('bind', 'dirty', 'deleted', 'new', 'identity_map',
             'is_active', 'autoflush', 'no_autoflush', 'info'):
    setattr(scoped_session, prop, makeprop(prop))

def clslevel(name):
    def do(cls, *args, **kwargs):
        return getattr(Session, name)(*args, **kwargs)
    return classmethod(do)

for prop in ('close_all', 'object_session', 'identity_key'):
    setattr(scoped_session, prop, clslevel(prop))

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