.. changelog::
:version: 1.2.0
- :include_notes_from: unreleased_12
+ :released: December 27, 2017
+
+ .. change::
+ :tags: orm, feature
+ :tickets: 4137
+
+ Added a new data member to the identity key tuple
+ used by the ORM's identity map, known as the
+ "identity_token". This token defaults to None but
+ may be used by database sharding schemes to differentiate
+ objects in memory with the same primary key that come
+ from different databases. The horizontal sharding
+ extension integrates this token applying the shard
+ identifier to it, thus allowing primary keys to be
+ duplicated across horizontally sharded backends.
+
+ .. seealso::
+
+ :ref:`change_4137`
+
+ .. change::
+ :tags: bug, mysql
+ :tickets: 4115
+
+ Fixed regression from issue 1.2.0b3 where "MariaDB" version comparison can
+ fail for some particular MariaDB version strings under Python 3.
+
+ .. change::
+ :tags: enhancement, sql
+ :tickets: 959
+
+ Implemented "DELETE..FROM" syntax for Postgresql, MySQL, MS SQL Server
+ (as well as within the unsupported Sybase dialect) in a manner similar
+ to how "UPDATE..FROM" works. A DELETE statement that refers to more than
+ one table will switch into "multi-table" mode and render the appropriate
+ "USING" or multi-table "FROM" clause as understood by the database.
+ Pull request courtesy Pieter Mulder.
+
+ .. seealso::
+
+ :ref:`change_959`
+
+ .. change::
+ :tags: bug, sql
+ :tickets: 2694
+
+ Reworked the new "autoescape" feature introduced in
+ :ref:`change_2694` in 1.2.0b2 to be fully automatic; the escape
+ character now defaults to a forwards slash ``"/"`` and
+ is applied to percent, underscore, as well as the escape
+ character itself, for fully automatic escaping. The
+ character can also be changed using the "escape" parameter.
+
+ .. seealso::
+
+ :ref:`change_2694`
+
+
+ .. change::
+ :tags: bug, sql
+ :tickets: 4147
+
+ Fixed bug where the :meth:`.Table.tometadata` method would not properly
+ accommodate :class:`.Index` objects that didn't consist of simple
+ column expressions, such as indexes against a :func:`.text` construct,
+ indexes that used SQL expressions or :attr:`.func`, etc. The routine
+ now copies expressions fully to a new :class:`.Index` object while
+ substituting all table-bound :class:`.Column` objects for those
+ of the target table.
+
+ .. change::
+ :tags: bug, sql
+ :tickets: 4142
+
+ Changed the "visit name" of :class:`.ColumnElement` from "column" to
+ "column_element", so that when this element is used as the basis for a
+ user-defined SQL element, it is not assumed to behave like a table-bound
+ :class:`.ColumnClause` when processed by various SQL traversal utilities,
+ as are commonly used by the ORM.
+
+ .. change::
+ :tags: bug, sql, ext
+ :tickets: 4141
+
+ Fixed issue in :class:`.ARRAY` datatype which is essentially the same
+ issue as that of :ticket:`3832`, except not a regression, where
+ column attachment events on top of :class:`.ARRAY` would not fire
+ correctly, thus interfering with systems which rely upon this. A key
+ use case that was broken by this is the use of mixins to declare
+ columns that make use of :meth:`.MutableList.as_mutable`.
+
+ .. change::
+ :tags: feature, engine
+ :tickets: 4089
+
+ The "password" attribute of the :class:`.url.URL` object can now be
+ any user-defined or user-subclassed string object that responds to the
+ Python ``str()`` builtin. The object passed will be maintained as the
+ datamember :attr:`.url.URL.password_original` and will be consulted
+ when the :attr:`.url.URL.password` attribute is read to produce the
+ string value.
+
+ .. change::
+ :tags: bug, orm
+ :tickets: 4130
+
+ Fixed bug in :func:`.contains_eager` query option where making use of a
+ path that used :meth:`.PropComparator.of_type` to refer to a subclass
+ across more than one level of joins would also require that the "alias"
+ argument were provided with the same subtype in order to avoid adding
+ unwanted FROM clauses to the query; additionally, using
+ :func:`.contains_eager` across subclasses that use :func:`.aliased` objects
+ of subclasses as the :meth:`.PropComparator.of_type` argument will also
+ render correctly.
+
+
+
+
+ .. change::
+ :tags: feature, postgresql
+
+ Added new :class:`.postgresql.MONEY` datatype. Pull request courtesy
+ Cleber J Santos.
+
+ .. change::
+ :tags: bug, sql
+ :tickets: 4140
+
+ Fixed bug in new "expanding bind parameter" feature whereby if multiple
+ params were used in one statement, the regular expression would not
+ match the parameter name correctly.
+
+ .. change::
+ :tags: enhancement, ext
+ :tickets: 4135
+
+ Added new method :meth:`.baked.Result.with_post_criteria` to baked
+ query system, allowing non-SQL-modifying transformations to take place
+ after the query has been pulled from the cache. Among other things,
+ this method can be used with :class:`.horizontal_shard.ShardedQuery`
+ to set the shard identifier. :class:`.horizontal_shard.ShardedQuery`
+ has also been modified such that its :meth:`.ShardedQuery.get` method
+ interacts correctly with that of :class:`.baked.Result`.
+
+ .. change::
+ :tags: bug, oracle
+ :tickets: 4064
+
+ Added some additional rules to fully handle ``Decimal('Infinity')``,
+ ``Decimal('-Infinity')`` values with cx_Oracle numerics when using
+ ``asdecimal=True``.
+
+ .. change::
+ :tags: bug, mssql
+ :tickets: 4121
+
+ Fixed bug where sqltypes.BINARY and sqltypes.VARBINARY datatypes
+ would not include correct bound-value handlers for pyodbc,
+ which allows the pyodbc.NullParam value to be passed that
+ helps with FreeTDS.
+
+
+
+
+ .. change::
+ :tags: feature, misc
+
+ Added a new errors section to the documentation with background
+ about common error messages. Selected exceptions within SQLAlchemy
+ will include a link in their string output to the relevant section
+ within this page.
+
+ .. change::
+ :tags: bug, orm
+ :tickets: 4032
+
+ The :meth:`.Query.exists` method will now disable eager loaders for when
+ the query is rendered. Previously, joined-eager load joins would be rendered
+ unnecessarily as well as subquery eager load queries would be needlessly
+ generated. The new behavior matches that of the :meth:`.Query.subquery`
+ method.
.. changelog::
:version: 1.2.0b3
+ :released: December 27, 2017
:released: October 13, 2017
.. change::
.. changelog::
:version: 1.2.0b2
+ :released: December 27, 2017
:released: July 24, 2017
.. change:: 4033
.. changelog::
:version: 1.2.0b1
+ :released: December 27, 2017
:released: July 10, 2017
.. change:: scoped_autocommit
projects / thirdparty / sqlalchemy / sqlalchemy.git / commitdiff
