mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-06-06 07:45:30 -04:00
Mike Bayer
bb62d80217
Called after a configure() step has completed and
mappers were in fact affected. Theoretically this
event is called once per application, unless new mappings
are constructed after existing ones have been used
already.
- New declarative features:
- __declare_last__() method, establishes an event
listener for the class method that will be called
when mappers are completed with the final "configure"
step.
- __abstract__ flag. The class will not be mapped
at all when this flag is present on the class.
- New helper classes ConcreteBase, AbstractConcreteBase.
Allow concrete mappings using declarative which automatically
set up the "polymorphic_union" when the "configure"
mapper step is invoked.
- The mapper itself has semi-private methods that allow
the "with_polymorphic" selectable to be assigned
to the mapper after it has already been configured.
[ticket:2239]
SQLAlchemy
++++++++++
The Python SQL Toolkit and Object Relational Mapper
Requirements
------------
SQLAlchemy requires Python 2.4 or higher. One or more DB-API implementations
are also required for database access. See docs/intro.html for more
information on supported DB-API implementations.
Python 3 Compatibility
----------------------
Please see README.py3k for Python 3 installation and testing instructions.
Installation Tools
------------------
Installation is supported with standard Python distutils, as well
as with setuptools or Distribute. Distribute is recommended.
Distribute can be installed using the provided "distribute_setup.py"
script. The original setuptools may be installed using the
"ez_setup.py" script if preferred, or simply do nothing and distutils
will be used.
Installing
----------
To install::
python setup.py install
To use without installation, include the ``lib`` directory in your Python
path.
Running Tests
-------------
Please see README.unittests for full instructions on running unit tests.
Package Contents
----------------
doc/
HTML documentation, including tutorials and API reference. Point
a browser to the "index.html" to start.
examples/
Fully commented and executable implementations for a variety of tasks.
lib/
SQLAlchemy.
test/
Unit tests for SQLAlchemy.
Help
----
Mailing lists, wiki, and more are available on-line at
http://www.sqlalchemy.org.
License
-------
SQLAlchemy is distributed under the `MIT license
<http://www.opensource.org/licenses/mit-license.php>`_.