delta/python-packages/sqlalchemy.git/lib/sqlalchemy/orm/session.py, branch pr/191

- Fixed bug where the state tracking within multiple, nested

2015-04-02T16:19:15+00:00

:meth:`.Session.begin_nested` operations would fail to propagate
the "dirty" flag for an object that had been updated within
the inner savepoint, such that if the enclosing savepoint were
rolled back, the object would not be part of the state that was
expired and therefore reverted to its database state.
fixes #3352

- Added a list() call around a weak dictionary used within the

2015-04-01T20:55:58+00:00

commit phase of the session, which without it could cause
a "dictionary changed size during iter" error if garbage collection
interacted within the process.   Change was introduced by

- Fixed bug where the session attachment error "object is already

2015-03-10T21:51:35+00:00

attached to session X" would fail to prevent the object from
also being attached to the new session, in the case that execution
continued after the error raise occurred.
fixes #3301

- copyright 2015

2015-03-10T19:24:28+00:00

- remove the need for a recursive call here

2015-02-20T05:11:48+00:00

- Fixed bug where internal assertion would fail in the case where

2015-02-20T05:01:19+00:00

an ``after_rollback()`` handler for a :class:`.Session` incorrectly
adds state to that :class:`.Session` within the handler, and the task
to warn and remove this state (established by :ticket:`2389`) attempts
to proceed.
fixes #3309

- Mapped state internals have been reworked to allow for a 50% reduction

2015-02-18T21:08:19+00:00

in callcounts specific to the "expiration" of objects, as in
the "auto expire" feature of :meth:`.Session.commit` and
for :meth:`.Session.expire_all`, as well as in the "cleanup" step
which occurs when object states are garbage collected.
fixes #3307

- A warning is emitted if the ``isolation_level`` parameter is used

2015-02-04T23:35:01+00:00

with :meth:`.Connection.execution_options` when a :class:`.Transaction`
is in play; DBAPIs and/or SQLAlchemy dialects such as psycopg2,
MySQLdb may implicitly rollback or commit the transaction, or
not change the setting til next transaction, so this is never safe.
- Added new parameter :paramref:`.Session.connection.execution_options`
which may be used to set up execution options on a :class:`.Connection`
when it is first checked out, before the transaction has begun.
This is used to set up options such as isolation level on the
connection before the transaction starts.
- added new documentation section
detailing best practices for setting transaction isolation with
sessions.
fixes #3296

- corrections

2014-12-27T21:22:41+00:00

- attempt to add a script to semi-automate the fixing of links

- Added new method :meth:`.Session.invalidate`, functions similarly

2014-12-13T00:59:11+00:00

to :meth:`.Session.close`, except also calls
:meth:`.Connection.invalidate`
on all connections, guaranteeing that they will not be returned to
the connection pool.  This is useful in situations e.g. dealing
with gevent timeouts when it is not safe to use the connection further,
even for rollbacks.
references #3258