0.2 Changelog
==============
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+
.. changelog::
:version: 0.2.8
:released: Tue Sep 05 2006
.. change::
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cleanup on connection methods + documentation. custom DBAPI
arguments specified in query string, 'connect_args' argument
function to 'create_engine'.
.. change::
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:tickets: 274
added "recycle" argument to Pool, is "pool_recycle" on create_engine,
stale connections
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:tickets: 121
changed "invalidate" semantics with pooled connection; will
the connecting application
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eesh ! the tutorial doctest was broken for quite some time.
.. change::
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add_property() method on mapper does a "compile all mappers"
step in case the given property references a non-compiled mapper
(as it did in the case of the tutorial !)
.. change::
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:tickets: 277
check for pg sequence already existing before create
.. change::
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if a contextual session is established via MapperExtension.get_session
(as it is using the sessioncontext plugin, etc), a lazy load operation
persistent with a session already.
.. change::
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lazy loads will not fire off for an object that does not have a
database identity (why?
see http://www.sqlalchemy.org/trac/wiki/WhyDontForeignKeysLoadData)
.. change::
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unit-of-work does a better check for "orphaned" objects that are
part of a "delete-orphan" cascade, for certain conditions where the
parent isnt available to cascade from.
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mappers can tell if one of their objects is an "orphan" based
on interactions with the attribute package. this check is based
when objects are attached and detached from each other.
.. change::
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it is now invalid to declare a self-referential relationship with
"delete-orphan" (as the abovementioned check would make them impossible
to save)
.. change::
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improved the check for objects being part of a session when the
unit of work seeks to flush() them as part of a relationship..
.. change::
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:tickets: 280
statement execution supports using the same BindParam
parameters. nice job by Bill Noon figuring out the basic idea.
.. change::
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:tickets: 60, 71
postgres reflection moved to use pg_schema tables, can be overridden
with use_information_schema=True argument to create_engine.
.. change::
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:tickets: 155
added case_sensitive argument to MetaData, Table, Column, determines
work with
.. change::
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unit tests updated to run without any pysqlite installed; pool
test uses a mock DBAPI
.. change::
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:tickets: 281
urls support escaped characters in passwords
.. change::
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added limit/offset to UNION queries (though not yet in oracle)
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added "timezone=True" flag to DateTime and Time types. postgres
so far will convert this to "TIME[STAMP] (WITH|WITHOUT) TIME ZONE",
against datetimes that dont).
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:tickets: 287
fix to using query.count() with distinct, \**kwargs with SelectResults
count()
.. change::
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:tickets: 289
deregister Table from MetaData when autoload fails;
.. change::
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:tickets: 293
import of py2.5s sqlite3
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:tickets: 296
unicode fix for startswith()/endswith()
:released: Sat Aug 12 2006
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quoting facilities set up so that database-specific quoting can be
turned on for individual table, schema, and column identifiers when
Aaron Spike for his excellent efforts.
.. change::
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assignmapper was setting is_primary=True, causing all sorts of mayhem
by not raising an error when redundant mappers were set up, fixed
.. change::
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added allow_null_pks option to Mapper, allows rows where some
primary key columns are null (i.e. when mapping to outer joins etc)
.. change::
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modifcation to unitofwork to not maintain ordering within the
"new" list or within the UOWTask "objects" list; instead, new objects
sort) dont have to worry about maintaining order (which they werent anyway)
.. change::
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fixed reflection of foreign keys to autoload the referenced table
if it was not loaded already
.. change::
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:tickets: 256
- pass URL query string arguments to connect() function
.. change::
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:tickets: 257
- oracle boolean type
.. change::
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custom primary/secondary join conditions in a relation *will* be propagated
to backrefs by default. specifying a backref() will override this behavior.
.. change::
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better check for ambiguous join conditions in sql.Join; propagates to a
better error message in PropertyLoader (i.e. relation()/backref()) for when
the join condition can't be reasonably determined.
.. change::
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sqlite creates ForeignKeyConstraint objects properly upon table
reflection.
.. change::
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:tickets: 224
adjustments to pool stemming from changes made for.
succeeded. added a test script to attempt testing this.
.. change::
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fixed mysql reflection of default values to be PassiveDefault
.. change::
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:tickets: 263, 264
added reflected 'tinyint', 'mediumint' type to MS-SQL.
.. change::
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SingletonThreadPool has a size and does a cleanup pass, so that
only a given number of thread-local connections stay around (needed
for sqlite applications that dispose of threads en masse)
.. change::
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:tickets: 267, 265
fixed small pickle bug(s) with lazy loaders
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fixed possible error in mysql reflection where certain versions
return an array instead of string for SHOW CREATE TABLE call
.. change::
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:tickets: 1770
fix to lazy loads when mapping to joins
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all create()/drop() calls have a keyword argument of "connectable".
"engine" is deprecated.
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fixed ms-sql connect() to work with adodbapi
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added "nowait" flag to Select()
.. change::
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:tickets: 271
inheritance check uses issubclass() instead of direct __mro__ check
flexibly correspond to class inheritance
.. change::
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:tickets: 252
SelectResults will use a subselect, when calling an aggregate (i.e.
max, min, etc.) on a SelectResults that has an ORDER BY clause
.. change::
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:tickets: 269
fixes to types so that database-specific types more easily used;
fixes to mysql text types to work with this methodology
.. change::
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some fixes to sqlite date type organization
.. change::
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:tickets: 263
added MSTinyInteger to MS-SQL
:released: Thu Jul 20 2006
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:tickets: 76
big overhaul to schema to allow truly composite primary and foreign
and reflection is now more table oriented rather than column oriented.
.. change::
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overhaul to MapperExtension calling scheme, wasnt working very well
previously
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tweaks to ActiveMapper, supports self-referential relationships
.. change::
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slight rearrangement to objectstore (in activemapper/threadlocal)
so that the SessionContext is referenced by '.context' instead
of subclassed directly.
.. change::
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activemapper will use threadlocal's objectstore if the mod is
activated when activemapper is imported
.. change::
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small fix to URL regexp to allow filenames with '@' in them
.. change::
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fixes to Session expunge/update/etc...needs more cleanup.
.. change::
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select_table mappers *still* werent always compiling
.. change::
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fixed up Boolean datatype
.. change::
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added count()/count_by() to list of methods proxied by assignmapper;
this also adds them to activemapper
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connection exceptions wrapped in DBAPIError
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ActiveMapper now supports autoloading column definitions from the
database if you supply a __autoload__ = True attribute in your
any relationships.
.. change::
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deferred column load could screw up the connection status in
a flush() under some circumstances, this was fixed
.. change::
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expunge() was not working with cascade, fixed.
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potential endless loop in cascading operations fixed.
.. change::
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added "synonym()" function, applied to properties to have a
propname the same as another, for the purposes of overriding props
and allowing the original propname to be accessible in select_by().
.. change::
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fix to typing in clause construction which specifically helps
type issues with polymorphic_union (CAST/ColumnClause propagates
its type to proxy columns)
.. change::
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mapper compilation work ongoing, someday it'll work....moved
around the initialization of MapperProperty objects to be after
aware of their "inherited" status if so.
.. change::
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eager loads explicitly disallowed on self-referential relationships, or
relationships to an inheriting mapper (which is also self-referential)
.. change::
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:tickets: 244
reduced bind param size in query._get to appease the picky oracle
.. change::
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:tickets: 234
added 'checkfirst' argument to table.create()/table.drop(), as
well as table.exists()
.. change::
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:tickets: 245
some other ongoing fixes to inheritance
.. change::
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attribute/backref/orphan/history-tracking tweaks as usual...
:released: Sat Jul 08 2006
.. change::
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fixed endless loop bug in select_by(), if the traversal hit
two mappers that referenced each other
.. change::
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upgraded all unittests to insert './lib/' into sys.path,
working around new setuptools PYTHONPATH-killing behavior
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further fixes with attributes/dependencies/etc....
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improved error handling for when DynamicMetaData is not connected
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MS-SQL support largely working (tested with pymssql)
.. change::
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ordering of UPDATE and DELETE statements within groups is now
in order of primary key values, for more deterministic ordering
.. change::
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after_insert/delete/update mapper extensions now called per object,
not per-object-per-table
.. change::
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further fixes/refactorings to mapper compilation
:released: Tue Jun 27 2006
.. change::
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try/except when the mapper sets init.__name__ on a mapped class,
supports python 2.3
.. change::
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fixed bug where threadlocal engine would still autocommit
despite a transaction in progress
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lazy load and deferred load operations require the parent object
to be in a Session to do the operation; whereas before the operation
would just return a blank list or None, it now raises an exception.
.. change::
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Session.update() is slightly more lenient if the session to which
the given object was formerly attached to was garbage collected;
the previous Session.
.. change::
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fixes to mapper compilation, checking for more error conditions
.. change::
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small fix to eager loading combined with ordering/limit/offset
.. change::
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:tickets: 206
utterly remarkable: added a single space between 'CREATE TABLE'
reserved word tablename.....*
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more fixes to inheritance, related to many-to-many relations
properly saving
.. change::
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fixed bug when specifying explicit module to mysql dialect
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when QueuePool times out it raises a TimeoutError instead of
erroneously making another connection
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Queue.Queue usage in pool has been replaced with a locally
modified version (works in py2.3/2.4!) that uses a threading.RLock
causing a reentrant hang unless threading.RLock is used.
.. change::
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postgres will not place SERIAL keyword on a primary key column
if it has a foreign key constraint
.. change::
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:tickets: 221
cursor() method on ConnectionFairy allows db-specific extension
arguments to be propagated
.. change::
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:tickets: 225
lazy load bind params properly propagate column type
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new MySQL types: MSEnum, MSTinyText, MSMediumText, MSLongText, etc.
more support for MS-specific length/precision params in numeric types
patch courtesy Mike Bernson
.. change::
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:tickets: 224
some fixes to connection pool invalidate()
:released: Sat Jun 17 2006
.. change::
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overhaul to mapper compilation to be deferred. this allows mappers
to be constructed in any order, and their relationships to each
other are compiled when the mappers are first used.
.. change::
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fixed a pretty big speed bottleneck in cascading behavior particularly
when backrefs were in use
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the attribute instrumentation module has been completely rewritten; its
now a large degree simpler and clearer, slightly faster. the "history"
list attributes is now more open ended (i.e. theyre not sets anymore).
.. change::
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py2.4 "set" construct used internally, falls back to sets.Set when
"set" not available/ordering is needed.
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fix to transaction control, so that repeated rollback() calls
dont fail (was failing pretty badly when flush() would raise
an exception in a larger try/except transaction block)
.. change::
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:tickets: 151
"foreignkey" argument to relation() can also be a list. fixed
auto-foreignkey detection
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fixed bug where tables with schema names werent getting indexed in
the MetaData object properly
.. change::
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:tickets: 207
fixed bug where Column with redefined "key" property wasnt getting
type conversion happening in the ResultProxy
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fixed 'port' attribute of URL to be an integer if present
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fixed old bug where if a many-to-many table mapped as "secondary"
had extra columns, delete operations didnt work
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bugfixes for mapping against UNION queries
.. change::
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fixed incorrect exception class thrown when no DB driver present
.. change::
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:tickets: 138
added NonExistentTable exception thrown when reflecting a table
that doesnt exist
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small fix to ActiveMapper regarding one-to-one backrefs, other
refactorings
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overridden constructor in mapped classes gets __name__ and
__doc__ from the original class
.. change::
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:tickets: 200
fixed small bug in selectresult.py regarding mapper extension
.. change::
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small tweak to cascade_mappers, not very strongly supported
function at the moment
.. change::
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:tickets: 202
some fixes to between(), column.between() to propagate typing
information better
.. change::
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:tickets: 203
if an object fails to be constructed, is not added to the
session
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CAST function has been made into its own clause object with
its own compilation function in ansicompiler; allows MySQL
:released: Mon Jun 05 2006
.. change::
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:tickets: 190
big improvements to polymorphic inheritance behavior, enabling it
to work with adjacency list table structures
.. change::
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major fixes and refactorings to inheritance relationships overall,
more unit tests
.. change::
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fixed "echo_pool" flag on create_engine()
.. change::
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fix to docs, removed incorrect info that close() is unsafe to use
with threadlocal strategy (its totally safe !)
.. change::
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:tickets: 188
create_engine() can take URLs as string or unicode
.. change::
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firebird support partially completed;
thanks to James Ralston and Brad Clements for their efforts.
.. change::
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Oracle url translation was broken, fixed, will feed host/port/sid
into cx_oracle makedsn() if 'database' field is present, else uses
straight TNS name from the 'host' field
.. change::
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fix to using unicode criterion for query.get()/query.load()
.. change::
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count() function on selectables now uses table primary key or
first column instead of "1" for criterion, also uses label "rowcount"
instead of "count".
.. change::
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got rudimental "mapping to multiple tables" functionality cleaned up,
more correctly documented
.. change::
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restored global_connect() function, attaches to a DynamicMetaData
instance called "default_metadata". leaving MetaData arg to Table
out will use the default metadata.
.. change::
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fixes to session cascade behavior, entity_name propigation
.. change::
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reorganized unittests into subdirectories
.. change::
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more fixes to threadlocal connection nesting patterns
:released: Mon May 29 2006
.. change::
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"pool" argument to create_engine() properly propagates
.. change::
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fixes to URL, raises exception if not parsed, does not pass blank
fields along to the DB connect string (a string such as
user:host@/db was breaking on postgres)
.. change::
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small fixes to Mapper when it inserts and tries to get
new primary key values back
.. change::
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rewrote half of TLEngine, the ComposedSQLEngine used with
'strategy="threadlocal"'. it now properly implements engine.begin()/
added about six unittests.
.. change::
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major "duh" in pool.Pool, forgot to put back the WeakValueDictionary.
unittest which was supposed to check for this was also silently missing
of scope.
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placeholder dispose() method added to SingletonThreadPool, doesnt
do anything yet
.. change::
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rollback() is automatically called when an exception is raised,
but only if theres no transaction in process (i.e. works more like
autocommit).
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fixed exception raise in sqlite if no sqlite module present
.. change::
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added extra example detail for association object doc
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Connection adds checks for already being closed
:released: Sat May 27 2006
.. change::
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overhaul to Engine system so that what was formerly the SQLEngine
is now a ComposedSQLEngine which consists of a variety of components,
db modules as well as Session and Mapper.
.. change::
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create_engine now takes only RFC-1738-style strings:
driver://user:password@host:port/database
.. change::
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:tickets: 152
total rewrite of connection-scoping methodology, Connection objects
to the pool.
.. change::
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overhaul to Session interface and scoping. uses hibernate-style
methods, including query(class), save(), save_or_update(), etc.
across multiple engines.
.. change::
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overhaul to mapper's dependency and "cascade" behavior; dependency logic
factored out of properties.py into a separate module "dependency.py".
decisions on how that child should be updated in the DB with regards to deletes.
.. change::
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overhaul to Schema to build upon MetaData object instead of an Engine.
Entire SQL/Schema system can be used with no Engines whatsoever, executed
anymore and is replaced by DynamicMetaData.
.. change::
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:tickets: 167
true polymorphic behavior implemented, fixes
.. change::
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:tickets: 147
"oid" system has been totally moved into compile-time behavior;
doesnt get compiled, fixes
.. change::
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overhaul to packaging; "mapping" is now "orm", "objectstore" is now
"session", the old "objectstore" namespace gets loaded in via the
"threadlocal" mod if used
.. change::
- :tags:
- :tickets:
+ :tags:
+ :tickets:
mods now called in via "import <modname>". extensions favored over
mods as mods are globally-monkeypatching
.. change::
- :tags:
+ :tags:
:tickets: 154
fix to add_property so that it propagates properties to inheriting
mappers
.. change::
- :tags:
- :tickets:
+ :tags:
+ :tickets:
backrefs create themselves against primary mapper of its originating
property, priamry/secondary join arguments can be specified to override.
helps their usage with polymorphic mappers
.. change::
- :tags:
+ :tags:
:tickets: 31
"table exists" function has been implemented
.. change::
- :tags:
+ :tags:
:tickets: 98
"create_all/drop_all" added to MetaData object
.. change::
- :tags:
- :tickets:
+ :tags:
+ :tickets:
improvements and fixes to topological sort algorithm, as well as more
unit tests
.. change::
- :tags:
- :tickets:
+ :tags:
+ :tickets:
tutorial page added to docs which also can be run with a custom doctest
runner to ensure its properly working. docs generally overhauled to
deal with new code patterns
.. change::
- :tags:
- :tickets:
+ :tags:
+ :tickets:
many more fixes, refactorings.
.. change::
- :tags:
- :tickets:
+ :tags:
+ :tickets:
migration guide is available on the Wiki at
http://www.sqlalchemy.org/trac/wiki/02Migration
projects / thirdparty / sqlalchemy / sqlalchemy.git / commitdiff
