Mike Bayer [Tue, 14 Sep 2010 02:55:54 +0000 (22:55 -0400)]
- Fixed bug that would prevent "subqueryload" from
working correctly with single table inheritance
for a relationship from a subclass - the "where
type in (x, y, z)" only gets placed on the inside,
instead of repeatedly.
- When using from_self() with single table inheritance,
the "where type in (x, y, z)" is placed on the outside
of the query only, instead of repeatedly. May make
some more adjustments to this.
Mike Bayer [Mon, 13 Sep 2010 06:09:38 +0000 (02:09 -0400)]
- Fixed recursion bug which could occur when moving
an object from one reference to another, with
backrefs involved, where the initiating parent
was a subclass (with its own mapper) of the
previous parent.
Mike Bayer [Sun, 12 Sep 2010 23:18:08 +0000 (19:18 -0400)]
- lazy loads for relationship attributes now use
the current state, not the "committed" state,
of foreign and primary key attributes
when issuing SQL, if a flush is not in process.
Previously, only the database-committed state would
be used. In particular, this would cause a many-to-one
get()-on-lazyload operation to fail, as autoflush
is not triggered on these loads when the attributes are
determined and the "committed" state may not be
available. [ticket:1910]
- A new flag on relationship(), load_on_pending, allows
the lazy loader to fire off on pending objects without a
flush taking place, as well as a transient object that's
been manually "attached" to the session. Note that this
flag blocks attribute events from taking place when an
object is loaded, so backrefs aren't available until
after a flush. The flag is only intended for very
specific use cases.
Mike Bayer [Sun, 12 Sep 2010 16:37:43 +0000 (12:37 -0400)]
- Slight improvement to the behavior of "passive_updates=False"
when placed only on the many-to-one side of a
relationship; documentation has been clarified
that passive_updates=False should really be on the
one-to-many side.
- Placing passive_deletes=True on a many-to-one emits
a warning, since you probably intended to put it on
the one-to-many side.
Mike Bayer [Thu, 9 Sep 2010 23:21:23 +0000 (19:21 -0400)]
- collection docs
- Added an assertion during flush which ensures
that no NULL-holding identity keys were generated
on "newly persistent" objects.
This can occur when user defined code inadvertently
triggers flushes on not-fully-loaded objects.
Mike Bayer [Tue, 7 Sep 2010 16:37:43 +0000 (12:37 -0400)]
- Applied patches from [ticket:1904] to get
basic Informix functionality up again. We
rely upon end-user testing to ensure that
Informix is working to some degree.
Mike Bayer [Tue, 7 Sep 2010 16:16:29 +0000 (12:16 -0400)]
- Added a mutex to the identity map which mutexes
remove operations against iteration methods,
which now pre-buffer before returning an
iterable. This because asyncrhonous gc
can remove items via the gc thread at any time.
[ticket:1891]
Mike Bayer [Mon, 6 Sep 2010 14:55:53 +0000 (10:55 -0400)]
- query.with_parent() now accepts transient objects
and will use the non-persistent values of their pk/fk
attributes in order to formulate the criterion.
Docs are also clarified as to the purpose of with_parent().
- fix for PG test executing an alias()
Mike Bayer [Sun, 5 Sep 2010 18:44:58 +0000 (14:44 -0400)]
- rewrote the "connections" section
- improved pool docs
- typos etc.
- ClauseElement.execute() and scalar() make no sense - these are depreacted.
The official home is Executable.
- alias() is not executable, allowing it is sloppy so this goes under
the deprecated umbrella
Mike Bayer [Sun, 5 Sep 2010 15:28:43 +0000 (11:28 -0400)]
- mapper _get_col_to_prop private method used
by the versioning example is deprecated;
now use mapper.get_property_by_column() which
will remain the public method for this.
- turned TODO in the history example into an assertion
with a descriptive reason
Mike Bayer [Tue, 31 Aug 2010 00:10:03 +0000 (20:10 -0400)]
- a large hill to climb. Added declarative examples to all the
"basic relationship" examples, cleaned up the examples and added
some more explicitness. Also renamed "treenodes" to "nodes" and
added self-referential declarative example.
- Added info/examples on how to join tables directly when querying with
joined table inheritance.
- Starting to talk about hybrids in the main mapper docs some more.
introducoed the idea that synonyms are on their way out.
- SQL expressions as mapped attributes also gets better verbiage,
alternative approaches to them, including hybrids.
- modernized the hybrid example.
- object_session() as a standalone function wasn't documented ?!
Mike Bayer [Mon, 30 Aug 2010 21:41:47 +0000 (17:41 -0400)]
- The include_properties and exclude_properties arguments
to mapper() now accept Column objects as members in
addition to strings. This so that same-named Column
objects, such as those within a join(), can be
disambiguated.
- A warning is now emitted if a mapper is created against a
join or other single selectable that includes multiple
columns with the same name in its .c. collection,
and those columns aren't explictly named as part of
the same or separate attributes (or excluded).
In 0.7 this warning will be an exception. Note that
this warning is not emitted when the combination occurs
as a result of inheritance, so that attributes
still allow being overridden naturally.
[ticket:1896]. In 0.7 this will be improved further.
- The primary_key argument to mapper() can now specify
a series of columns that are only a subset of
the calculated "primary key" columns of the mapped
selectable, without an error being raised. This
helps for situations where a selectable's effective
primary key is simpler than the number of columns
in the selectable that are actually marked as
"primary_key", such as a join against two
tables on their primary key columns [ticket:1896].
Mike Bayer [Sun, 29 Aug 2010 22:13:18 +0000 (18:13 -0400)]
- The Session class is now present in sqlalchemy.orm.*.
We're moving away from the usage of create_session(),
which has non-standard defaults, for those situations
where a one-step Session constructor is desired. Most
users should stick with sessionmaker() for general use,
however.
Mike Bayer [Sun, 29 Aug 2010 21:06:05 +0000 (17:06 -0400)]
- Oracle reflection of indexes has been tuned so
that indexes which include some or all primary
key columns, but not the same set of columns
as that of the primary key, are reflected.
Indexes which contain the identical columns
as that of the primary key are skipped within
reflection, as the index in that case is assumed
to be the auto-generated primary key index.
Previously, any index with PK columns present
would be skipped. Thanks to Kent Bower
for the patch. [ticket:1867]
- Oracle now reflects the names of primary key
constraints - also thanks to Kent Bower.
[ticket:1868]
Mike Bayer [Thu, 26 Aug 2010 15:32:50 +0000 (11:32 -0400)]
- An object that's been deleted now gets a flag
'deleted', which prohibits the object from
being re-add()ed to the session, as previously
the object would live in the identity map
silently until its attributes were accessed.
The make_transient() function now resets this
flag along with the "key" flag.
- make_transient() can be safely called on an
already transient instance.
Mike Bayer [Thu, 26 Aug 2010 05:33:51 +0000 (01:33 -0400)]
- replaced all self.__connection.is_valid with
"safe" self._connection_is_valid.
- Fixed bug in Connection whereby if a "disconnect"
event occurred in the "initialize" phase of the
first connection pool connect, an AttributeError
would be raised when the Connection would attempt
to invalidate the DBAPI connection. [ticket:1894]
- Connection.invalidate() can be called more than
once and subsequent calls do nothing.
Mike Bayer [Mon, 23 Aug 2010 22:17:31 +0000 (18:17 -0400)]
- the history_meta versioning recipe sets "unique=False"
when copying columns, so that the versioning
table handles multiple rows with repeating values.
[ticket:1887]
Mike Bayer [Sat, 21 Aug 2010 23:38:28 +0000 (19:38 -0400)]
- Similarly, for relationship(), foreign_keys,
remote_side, order_by - all column-based
expressions are enforced - lists of strings
are explicitly disallowed since this is a
very common error
Mike Bayer [Sat, 14 Aug 2010 18:52:18 +0000 (14:52 -0400)]
- Another pass through the series of error messages
emitted when relationship() is configured with
ambiguous arguments. The "foreign_keys"
setting is no longer mentioned, as it is almost
never needed and it is preferable users set up
correct ForeignKey metadata, which is now the
recommendation. If 'foreign_keys'
is used and is incorrect, the message suggests
the attribute is probably unnecessary. Docs
for the attribute are beefed up. This
because all confused relationship() users on the
ML appear to be attempting to use foreign_keys
due to the message, which only confuses them
further since Table metadata is much clearer.
- If the "secondary" table has no ForeignKey metadata
and no foreign_keys is set, even though the
user is passing screwed up information, it is assumed
that primary/secondaryjoin expressions should
consider only and all cols in "secondary" to be
foreign. It's not possible with "secondary" for
the foreign keys to be elsewhere in any case.
A warning is now emitted instead of an error,
and the mapping succeeds. [ticket:1877]
- fixed incorrect "Alternate Collection Mappings" reference
in the docs, not sure if someone wants to reference
"Rows that Point to Themselves" function
- "Collection Mapping" is "Advanced Collection Mapping", this
section is troublesome since nobody really needs it but it
is public API
Mike Bayer [Wed, 11 Aug 2010 15:57:56 +0000 (11:57 -0400)]
- a warning is emitted in mapper() if the polymorphic_on
column is not present either in direct or derived
form in the mapped selectable or in the
with_polymorphic selectable, instead of silently
ignoring it. Look for this to become an
exception in 0.7.
Mike Bayer [Tue, 10 Aug 2010 14:24:02 +0000 (10:24 -0400)]
- Fixed the psycopg2 dialect to use its
set_isolation_level() method instead of relying
upon the base "SET SESSION ISOLATION" command,
as psycopg2 resets the isolation level on each new
transaction otherwise.
Mike Bayer [Sun, 8 Aug 2010 19:14:27 +0000 (15:14 -0400)]
- some of the refinements from the sa_synonyms branch which will
allow the hybrid extension to work, but doesn't re-implement synonym,
comparable_property,concreteinheritedproperty
- mapper.get_property() and _entity_descriptor use plain getattr()
to get at descriptors in all cases, thereby placing more
trust in the ultimate class-bound attribute to provide mapped
properties
Mike Bayer [Sun, 8 Aug 2010 00:58:23 +0000 (20:58 -0400)]
- the _Label construct, i.e. the one that is produced
whenever you say somecol.label(), now counts itself
in its "proxy_set" unioned with that of it's
contained column's proxy set, instead of
directly returning that of the contained column.
This allows column correspondence
operations which depend on the identity of the
_Labels themselves to return the correct result
- fixes ORM bug [ticket:1852].
Mike Bayer [Thu, 5 Aug 2010 16:28:01 +0000 (12:28 -0400)]
- Dynamic attributes don't support collection
population - added an assertion for when
set_committed_value() is called, as well as
when joinedload() or subqueryload() options
are applied to a dynamic attribute, instead
of failure / silent failure. [ticket:1864]
Mike Bayer [Thu, 5 Aug 2010 01:30:53 +0000 (21:30 -0400)]
- Fixed bug whereby replacing composite foreign key
columns in a reflected table would cause an attempt
to remove the reflected constraint from the table
a second time, raising a KeyError. [ticket:1865]
- fixed test of error message now that we've improved it
(didn't know that msg had an assertion)
Mike Bayer [Tue, 3 Aug 2010 18:06:41 +0000 (14:06 -0400)]
- the text() construct, if placed in a column
oriented situation, will at least return NULLTYPE
for its type instead of None, allowing it to
be used a little more freely for ad-hoc column
expressions than before. literal_column()
is still the better choice, however.
Mike Bayer [Tue, 3 Aug 2010 15:55:12 +0000 (11:55 -0400)]
- Calling fetchone() or similar on a result that
has already been exhausted, has been closed,
or is not a result-returning result now
raises ResourceClosedError, a subclass of
InvalidRequestError, in all cases, regardless
of backend. Previously, some DBAPIs would
raise ProgrammingError (i.e. pysqlite), others
would return None leading to downstream breakages
(i.e. MySQL-python).
- Connection, ResultProxy, as well as Session use
ResourceClosedError for all "this
connection/transaction/result is closed" types of
errors.
Mike Bayer [Tue, 3 Aug 2010 00:41:47 +0000 (20:41 -0400)]
- add an example of declarative with hybrid, including why this
is a different use case (i.e. formalized apps vs. quickstart).
- solidified docstrings for ForeignKey
Mike Bayer [Mon, 2 Aug 2010 20:59:06 +0000 (16:59 -0400)]
- Specifying a non-column based argument
for column_mapped_collection, including string,
text() etc., will raise an error message that
specifically asks for a column element, no longer
misleads with incorrect information about
text() or literal(). [ticket:1863]
Mike Bayer [Mon, 2 Aug 2010 19:29:31 +0000 (15:29 -0400)]
- if @classproperty is used with a regular class-bound
mapper property attribute, it will be called to get the
actual attribute value during initialization. Currently,
there's no advantage to using @classproperty on a column
or relationship attribute of a declarative class that
isn't a mixin - evaluation is at the same time as if
@classproperty weren't used. But here we at least allow
it to function as expected.
- docs for column_property() with declarative
- mixin docs in declarative made more clear - mixins
are optional - each subsection starts with, "in *declarative mixins*",
to reduce confusion
Mike Bayer [Mon, 2 Aug 2010 05:12:03 +0000 (01:12 -0400)]
- The generated index name also is based on
a "max index name length" attribute which is
separate from the "max identifier length" -
this to appease MySQL who has a max length
of 64 for index names, separate from their
overall max length of 255. [ticket:1412]
Mike Bayer [Mon, 2 Aug 2010 00:55:44 +0000 (20:55 -0400)]
- worked through about 25% of mappers.rst to implement
up to date and clear explanations of things, including
as much context and description as possible
Mike Bayer [Sun, 1 Aug 2010 22:24:35 +0000 (18:24 -0400)]
- The name ConcurrentModificationError has been
changed to StaleDataError, and descriptive
error messages have been revised to reflect
exactly what the issue is. Both names will
remain available for the forseeable future
for schemes that may be specifying
ConcurrentModificationError in an "except:"
clause.
Mike Bayer [Sun, 1 Aug 2010 18:07:35 +0000 (14:07 -0400)]
- Repaired the usage of merge() when used with
concrete inheriting mappers. Such mappers frequently
have so-called "concrete" attributes, which are
subclass attributes that "disable" propagation from
the parent - these needed to allow a merge()
operation to pass through without effect.