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Anssi Kääriäinen 6b4834952d Fixed #16649 -- Refactored save_base logic 
Model.save() will use UPDATE - if not updated - INSERT instead of
SELECT - if found UPDATE else INSERT. This should save a query when
updating, but will cost a little when inserting model with PK set.

Also fixed #17341 -- made sure .save() commits transactions only after
the whole model has been saved. This wasn't the case in model
inheritance situations.

The save_base implementation was refactored into multiple methods.
A typical chain for inherited save is:
save_base()
    _save_parents(self)
        for each parent:
            _save_parents(parent)
            _save_table(parent)
    _save_table(self)
 		2013-03-14 11:01:47 +02:00
..
__init__.py Merged regressiontests and modeltests into the test root. 2013-02-26 14:36:57 +01:00
models.py Merged regressiontests and modeltests into the test root. 2013-02-26 14:36:57 +01:00
tests.py Fixed #16649 -- Refactored save_base logic 2013-03-14 11:01:47 +02:00