Mike Bayer [Thu, 2 Apr 2015 16:19:15 +0000 (12:19 -0400)]
- Fixed bug where the state tracking within multiple, nested
: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
Mike Bayer [Wed, 1 Apr 2015 23:18:36 +0000 (19:18 -0400)]
- :class:`.Query` doesn't support joins, subselects, or special
FROM clauses when using the :meth:`.Query.update` or
:meth:`.Query.delete` methods; instead of silently ignoring these
fields if methods like :meth:`.Query.join` or
:meth:`.Query.select_from` has been called, an error is raised.
In 0.9.10 this only emits a warning.
fixes #3349
- don't needlessly call _compile_context() and build up a
whole statement that we never need. Construct QueryContext
as it's part of the event contract, but don't actually call upon
mapper attributes; use more direct systems of determining the
update or delete table.
- don't realy need _no_select_modifiers anymore
Mike Bayer [Wed, 1 Apr 2015 20:55:58 +0000 (16:55 -0400)]
- Added a list() call around a weak dictionary used within the
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
Mike Bayer [Wed, 1 Apr 2015 20:50:32 +0000 (16:50 -0400)]
- Fixed bug where updated PG index reflection as a result of
:ticket:`3184` would cause index operations to fail on Postgresql
versions 8.4 and earlier. The enhancements are now
disabled when using an older version of Postgresql.
fixes #3343
Mike Bayer [Tue, 31 Mar 2015 18:40:21 +0000 (14:40 -0400)]
- The warning emitted by the unicode type for a non-unicode type
has been liberalized to warn for values that aren't even string
values, such as integers; previously, the updated warning system
of 1.0 made use of string formatting operations which
would raise an internal TypeError. While these cases should ideally
raise totally, some backends like SQLite and MySQL do accept them
and are potentially in use by legacy code, not to mention that they
will always pass through if unicode conversion is turned off
for the target backend.
fixes #3346
Mike Bayer [Mon, 30 Mar 2015 21:49:39 +0000 (17:49 -0400)]
- Fixed a bug related to "nested" inner join eager loading, which
exists in 0.9 as well but is more of a regression in 1.0 due to
:ticket:`3008` which turns on "nested" by default, such that
a joined eager load that travels across sibling paths from a common
ancestor using innerjoin=True will correctly splice each "innerjoin"
sibling into the appropriate part of the join, when a series of
inner/outer joins are mixed together.
fixes #3347
Mike Bayer [Tue, 24 Mar 2015 16:28:19 +0000 (12:28 -0400)]
- Turned off the "simple order by" flag on the MSSQL dialect; this
is the flag that per :ticket:`2992` causes an order by or group by
an expression that's also in the columns clause to be copied by
label, even if referenced as the expression object. The behavior
for MSSQL is now the old behavior that copies the whole expression
in by default, as MSSQL can be picky on these particularly in
GROUP BY expressions.
fixes #3338
- Add a test that includes a composed label in a GROUP BY
Mike Bayer [Tue, 24 Mar 2015 14:55:29 +0000 (10:55 -0400)]
- The "auto-attach" feature of constraints such as :class:`.UniqueConstraint`
and :class:`.CheckConstraint` has been further enhanced such that
when the constraint is associated with non-table-bound :class:`.Column`
objects, the constraint will set up event listeners with the
columns themselves such that the constraint auto attaches at the
same time the columns are associated with the table. This in particular
helps in some edge cases in declarative but is also of general use.
fixes #3341
Mike Bayer [Mon, 23 Mar 2015 16:33:48 +0000 (12:33 -0400)]
- Fixed bug in new "label resolution" feature of :ticket:`2992` where
a label that was anonymous, then labeled again with a name, would
fail to be locatable via a textual label. This situation occurs
naturally when a mapped :func:`.column_property` is given an
explicit label in a query.
fixes #3340
Mike Bayer [Sun, 22 Mar 2015 23:05:22 +0000 (19:05 -0400)]
- Fixed unicode support for PyMySQL when using an "executemany"
operation with unicode parameters. SQLAlchemy now passes both
the statement as well as the bound parameters as unicode
objects, as PyMySQL generally uses string interpolation
internally to produce the final statement, and in the case of
executemany does the "encode" step only on the final statement.
fixes #3337
Mike Bayer [Sat, 21 Mar 2015 17:12:15 +0000 (13:12 -0400)]
- Fixed bug in new "label resolution" feature of :ticket:`2992` where
the string label placed in the order_by() or group_by() of a statement
would place higher priority on the name as found
inside the FROM clause instead of a more locally available name
inside the columns clause.
fixes #3335
Mike Bayer [Fri, 20 Mar 2015 23:53:12 +0000 (19:53 -0400)]
- Repaired the commit for issue #2771 which was inadvertently commented
out.
- add __backend__ to the dialect suite so that it runs on CI.
- will be 1.0.0b3
Mike Bayer [Wed, 18 Mar 2015 22:57:13 +0000 (18:57 -0400)]
- Loosened some restrictions that were added to ``@declared_attr``
objects, such that they were prevented from being called outside
of the declarative process; this is related to the enhancements
of #3150 which allow ``@declared_attr`` to return a value that is
cached based on the current class as it's being configured.
The exception raise has been removed, and the behavior changed
so that outside of the declarative process, the function decorated by
``@declared_attr`` is called every time just like a regular
``@property``, without using any caching, as none is available
at this stage.
fixes #3331
Mike Bayer [Tue, 17 Mar 2015 16:32:33 +0000 (12:32 -0400)]
- The "auto close" for :class:`.ResultProxy` is now a "soft" close.
That is, after exhausing all rows using the fetch methods, the
DBAPI cursor is released as before and the object may be safely
discarded, but the fetch methods may continue to be called for which
they will return an end-of-result object (None for fetchone, empty list
for fetchmany and fetchall). Only if :meth:`.ResultProxy.close`
is called explicitly will these methods raise the "result is closed"
error.
fixes #3330 fixes #3329
Mike Bayer [Thu, 12 Mar 2015 14:14:52 +0000 (10:14 -0400)]
- try to document how to get columns from constraints.
unfortunately Sphinx refuses to work correctly for the columns
attribute so we just add a lame message to contains_column().
Mike Bayer [Thu, 12 Mar 2015 00:22:42 +0000 (20:22 -0400)]
- Added a new extension suite :mod:`sqlalchemy.ext.baked`. This
simple but unusual system allows for a dramatic savings in Python
overhead for the construction and processing of orm :class:`.Query`
objects, from query construction up through rendering of a string
SQL statement.
fixes #3054
Mike Bayer [Wed, 11 Mar 2015 18:46:52 +0000 (14:46 -0400)]
- Added a new entry ``"entity"`` to the dictionaries returned by
:attr:`.Query.column_descriptions`. This refers to the primary ORM
mapped class or aliased class that is referred to by the expression.
Compared to the existing entry for ``"type"``, it will always be
a mapped entity, even if extracted from a column expression, or
None if the given expression is a pure core expression.
references #3320
Mike Bayer [Wed, 11 Mar 2015 15:41:52 +0000 (11:41 -0400)]
- The Postgresql :class:`.postgresql.ENUM` type will emit a
DROP TYPE instruction when a plain ``table.drop()`` is called,
assuming the object is not associated directly with a
:class:`.MetaData` object. In order to accomodate the use case of
an enumerated type shared between multiple tables, the type should
be associated directly with the :class:`.MetaData` object; in this
case the type will only be created at the metadata level, or if
created directly. The rules for create/drop of
Postgresql enumerated types have been highly reworked in general.
fixes #3319
Mike Bayer [Tue, 10 Mar 2015 23:56:59 +0000 (19:56 -0400)]
- Added a new event suite :class:`.QueryEvents`. The
:meth:`.QueryEvents.before_compile` event allows the creation
of functions which may place additional modifications to
:class:`.Query` objects before the construction of the SELECT
statement. It is hoped that this event be made much more
useful via the advent of a new inspection system that will
allow for detailed modifications to be made against
:class:`.Query` objects in an automated fashion.
fixes #3317
Mike Bayer [Tue, 10 Mar 2015 22:23:23 +0000 (18:23 -0400)]
- The subquery wrapping which occurs when joined eager loading
is used with a one-to-many query that also features LIMIT,
OFFSET, or DISTINCT has been disabled in the case of a one-to-one
relationship, that is a one-to-many with
:paramref:`.relationship.uselist` set to False. This will produce
more efficient queries in these cases.
fixes #3249
Mike Bayer [Tue, 10 Mar 2015 21:51:35 +0000 (17:51 -0400)]
- Fixed bug where the session attachment error "object is already
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
Mike Bayer [Tue, 10 Mar 2015 21:21:46 +0000 (17:21 -0400)]
- Fixed bug where using an ``__abstract__`` mixin in the middle
of a declarative inheritance hierarchy would prevent attributes
and configuration being correctly propagated from the base class
to the inheriting class.
fixes #3219 fixes #3240
Mike Bayer [Mon, 9 Mar 2015 19:24:37 +0000 (15:24 -0400)]
- fix a potential race condition where the per-mapper LRUCache used by
persistence.py could theoretically hit the limit of the cache
(100 items by default) and at some points fail to have a key that
we check for, due to the cleanup. This has never been observed
so its likely that so far, the total number of INSERT, UPDATE and
DELETE statement structures in real apps has not exceeded 100
on a per-mapper basis; this could happen for apps that run a
very wide variety of attribute modified combinations into the unit
of work, *and* which have very high concurrency going on.
This change will be a lot more significant when we open up
use of LRUCache + compiled cache with the baked query extension.
Mike Bayer [Mon, 9 Mar 2015 19:24:01 +0000 (15:24 -0400)]
- reduce some callcounts related to the lightweight tuple,
basically by caching them.
- improve LRUCache so that size management only proceeds
in one thread, add a real get() method
Mike Bayer [Mon, 9 Mar 2015 16:26:30 +0000 (12:26 -0400)]
- we really don't want to force lib here, but we do need
it for the plain "pytest" case, so do an append instead of an insert
- add a new tox file to do a full regen of callcounts
Mike Bayer [Sun, 8 Mar 2015 03:51:12 +0000 (22:51 -0500)]
- the change for #918 was of course not nearly that simple.
The "wrapping" employed by the mssql and oracle dialects using the
"iswrapper" argument was not being used intelligently by the compiler,
and the result map was being written incorrectly, using
*more* columns in the result map than were actually returned by
the statement, due to "row number" columns that are inside the
subquery. The compiler now writes out result map on the
"top level" select in all cases
fully, and for the mssql/oracle wrapping case extracts out
the "proxied" columns in a second step, which only includes
those columns that are proxied outwards to the top level.
This change might have implications for 3rd party dialects that
might be imitating oracle's approach. They can safely continue
to use the "iswrapper" kw which is now ignored, but they may
need to also add the _select_wraps argument as well.
Mike Bayer [Sat, 7 Mar 2015 17:48:13 +0000 (12:48 -0500)]
- The SQL compiler now generates the mapping of expected columns
such that they are matched to the received result set positionally,
rather than by name. Originally, this was seen as a way to handle
cases where we had columns returned with difficult-to-predict names,
though in modern use that issue has been overcome by anonymous
labeling. In this version, the approach basically reduces function
call count per-result by a few dozen calls, or more for larger
sets of result columns. The approach still degrades into a modern
version of the old approach if textual elements modify the result
map, or if any discrepancy in size exists between
the compiled set of columns versus what was received, so there's no
issue for partially or fully textual compilation scenarios where these
lists might not line up. fixes #918
- callcounts still need to be adjusted down for this so zoomark
tests won't pass at the moment