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models.
Backport of 6613ea6e3f from master
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Backport of 1dcc603eff from master
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Backport of 428c0bbe1bcd303560d7e96d7d2721ff3fdc0e3f from master
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The model_inheritance_same_model_name tests couldn't be run without the
model_inheritance tests. Make the problem go away by merging them.
Thanks timo for the report.
Backport of 0097d38 from master
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Thanks Anssi Kääriäinen for the suggestion.
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Signed-off-by: Jason Myers <jason@jasonamyers.com>
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Cleaned up the internal implementation of m2m fields by removing
related.py _get_fk_val(). The _get_fk_val() was doing the wrong thing
if asked for the foreign key value on foreign key to parent model's
primary key when child model had different primary key field.
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An isnull lookup produced incorrect SQL. This was already fixed
earlier, so only tests added.
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Fixed #11892, fixed #16458, fixed #14492.
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not have a default value
Thanks to Collin Anderson for the suggestion and Tim Graham for
reviewing the patch.
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Should be unneeded with Python 2.7 and up.
Added some unicode_literals along the way.
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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)
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inner query.
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