delta/python-packages/sqlalchemy.git/lib/sqlalchemy/orm/session.py, branch pr_github_383

Guard against KeyError in session.merge after check for identity

2017-09-04T23:37:34+00:00

Fixed bug in :meth:`.Session.merge` following along similar lines as that
of :ticket:`4030`, where an internal check for a target object in
the identity map could lead to an error if it were to be garbage collected
immediately before the merge routine actually retrieves the object.

Change-Id: Ifecfb8b9d50c52d0ebd5a03e1bd69fe3abf1dc40
Fixes: #4069

Consider merge key with (None, ) as non-persistent

2017-08-31T21:21:35+00:00

Fixed bug in :meth:`.Session.merge` where objects in a collection that had
the primary key attribute set to ``None`` for a key that is  typically
autoincrementing would be considered to be a database-persisted key for
part of the internal deduplication process, causing only one object to
actually be inserted in the database.

Change-Id: I0a6e00043be0b2979cda33740e1be3b430ecf8c7
Fixes: #4056
(cherry picked from commit 5243341ed886e10a0d3f7fef8ae3d071e0ffdcf0)

Deactivate transaction if rollback fails

2017-08-22T20:17:39+00:00

Fixed regression introduced in 1.2.0b1 due to :ticket:`3934` where the
:class:`.Session` would fail to "deactivate" the transaction, if a
rollback failed (the target issue is when MySQL loses track of a SAVEPOINT).
This would cause a subsequent call to :meth:`.Session.rollback` to raise
an error a second time, rather than completing and bringing the
:class:`.Session` back to ACTIVE.

Fixes: #4050
Change-Id: Id245e8dd3487cb006b2d6631c8bd513b5ce81abe

Enable multi-level selectin polymorphic loading

2017-08-07T19:05:00+00:00

Change-Id: Icc742bbeecdb7448ce84caccd63e086af16e81c1
Fixes: #4026

Add with_for_update() support in session.refresh()

2017-05-24T20:23:56+00:00

Session.refresh() is still hardcoded to legacy lockmode,
come up with a new API so that the newer argument style
works with it.

Added new argument :paramref:`.with_for_update` to the
:meth:`.Session.refresh` method.  When the :meth:`.Query.with_lockmode`
method were deprecated in favor of :meth:`.Query.with_for_update`,
the :meth:`.Session.refresh` method was never updated to reflect
the new option.

Change-Id: Ia02a653746b7024699b515451525a88d7a17d63a
Fixes: #3991

Add new configuration, inspection for baked queries

2017-05-17T21:08:23+00:00

Added new flag :paramref:`.Session.enable_baked_queries` to the
:class:`.Session` to allow baked queries to be disabled
session-wide, reducing memory use.   Also added new :class:`.Bakery`
wrapper so that the bakery returned by :paramref:`.BakedQuery.bakery`
can be inspected.

Change-Id: I5657af7a99d2b24c89d6aee1343f432728e3f807

- add complete parameter /return value docs to session.begin() /

2017-05-17T14:58:37+00:00

session.begin_nested().  Fixes #3993

Change-Id: If485d77b364c34d94061d2f48efbde3f8a8adec9

fixes a typo

2017-05-01T17:30:11+00:00

Emit after_rollback() event before snapshot removal

2017-03-14T19:40:31+00:00

The state of the :class:`.Session` is now present when the
:meth:`.SessionEvents.after_rollback` event is emitted, that is,  the
attribute state of objects prior to their being expired.   This is now
consistent with the  behavior of the
:meth:`.SessionEvents.after_commit` event which  also emits before the
attribute state of objects is expired.

Change-Id: I9c572656ec5a9bfaeab817e9c95107c75aca1b51
Fixes: #3934

Support python3.6

2017-01-13T15:57:41+00:00

Corrects some warnings and adds tox config.  Adds DeprecationWarning
to the error category.   Large sweep for string literals w/ backslashes
as this is common in docstrings

Co-authored-by: Andrii Soldatenko
Fixes: #3886
Change-Id: Ia7c838dfbbe70b262622ed0803d581edc736e085
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/337