Products.sqlalchemyda

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This is a more stable beta, with several fixes. It has been tested
with SQLAlchemy 0.9.8, Zope2.13, and Python 2.7.9.

Fixes from beta 1-7 include:

- Manifest now includes the .rst, .txt, and .zpt files required
for installation via ZMI in Zope2.
- The new `lookup_da` registry was failing to populate after
Zope restarts; now the registry populates when the DA instance
unpickles. (TODO: needs test coverage; this feature is not
as robust as it could be, since the registry could be
called before unpickling). UPDATE for beta 7: Still no
test coverage, but after manual testing fixed bug with
switched key and values in registry.
- Added a new `clear_da_registry` to support test teardown.
- NOTE: Beta6 release was taken from the wrong branch,
and contained experimental untested code. DO not use beta6.

Some non-public patches to support MSSQL have been tested; please inquire if
interested in having them merged to public code.

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- Added alternative lookup API to get a handle on SAWrapper instances. To use
the new lookup mechanism, see Products.SQLAlchemyDA.da.py and look for the
function `lookup_da`. This was created to allow avoiding Zope Acquisition as
a lookup mechanism, and to work around the issue that the underlying
z3c.sqlalchemy `getSAWrapper` function is non-usable when created by the
SAWrapper DA. This is because API consumers have no access to the random
internally generated name ('util_id' attribute) under which the utility
is registered...at least not without resorting to Acquisition calls.
- Tested with SQLAlchemy 0.7.6, Zope 2.13, and Python 2.7.9, and SQLite.
Your mileage may vary with other databases and versions, but most likely
it will run with older versions of Zope and Python as old as 2.5 (running
tests requires at least Python 2.5). Newer versions of SQLAlchemy will be
tested for the next release.

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- Fixed LP 639597

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- fixed typo in type mapping

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- Fixed LP 570208
- Added a method 'add_extra_engine_options' to set additional engine
options for SQLAlchemy.create_engine.
- Removed SOFTWARE_HOME dependency
- Requires SQLAlchemy >= 0.5.0

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- fixed issue with version.txt file