Current File : //opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/scoping.pyo
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e e e � � qWd S( i ( t class_mapper( t exc( t Sessioni ( t ScopedRegistry( t ThreadLocalRegistry( t warnt scoped_sessionc B sG e Z d Z d Z d d � Z d � Z d � Z d � Z d d � Z RS( st Provides scoped management of :class:`.Session` objects.
See :ref:`unitofwork_contextual` for a tutorial.
c C s7 | | _ | r$ t | | � | _ n t | � | _ d S( s� 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`.
N( t session_factoryR t registryR ( t selfR t scopefunc( ( sI /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/scoping.pyt __init__! s c K s[ | rM | j j � r' t j d � � qW | j | � } | j j | � | Sn
| j � Sd S( s� 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.
sE Scoped session is already present; no new arguments may be specified.N( R t hast sa_exct InvalidRequestErrorR t set( R t kwt sess( ( sI /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/scoping.pyt __call__8 s c C s3 | j j � r" | j � j � n | j j � d S( s� 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.
N( R R t closet clear( R ( ( sI /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/scoping.pyt removeP s
c K s0 | j j � r t d � n | j j | � d S( s� reconfigure the :class:`.sessionmaker` used by this
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See :meth:`.sessionmaker.configure`.
st At least one scoped session is already present. configure() can not affect sessions that have already been created.N( R R R R t configure( R t kwargs( ( sI /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/scoping.pyR a s
c s& d t f � � f d � � Y} | � S( s" 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.
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