delta/python-packages/sqlalchemy.git/test/ext/declarative/test_concurrency.py, branch 2020_tutorial github.com: zzzeek/sqlalchemy.git Enable F841 2019-06-20T17:50:41+00:00 Mike Bayer mike_mp@zzzcomputing.com 2019-05-30T15:31:03+00:00 190e0139e834e4271268652e058c280787ae69eb This is a very useful assertion which prevents unused variables from being set up allows code to be more readable and sometimes even more efficient. test suites seem to be where the most problems are and there do not seem to be documentation examples that are using this, or at least the linter is not taking effect within rst blocks. Change-Id: I2b3341d8dd14da34879d8425838e66a4b9f8e27d 
This is a very useful assertion which prevents unused variables
from being set up allows code to be more readable and sometimes
even more efficient.  test suites seem to be where the most
problems are and there do not seem to be documentation examples
that are using this, or at least the linter is not taking effect
within rst blocks.

Change-Id: I2b3341d8dd14da34879d8425838e66a4b9f8e27d
Adjust test_concurrency failure modes 2019-05-28T01:17:54+00:00 Mike Bayer mike_mp@zzzcomputing.com 2019-05-28T01:15:47+00:00 8b2eb2a2d0f4c7e283d96cf3e5263b5dd48e3b14 The test added for #4686 can raise for "B" missing which is normal and should not fail the test. Also ensure mappers are cleared to prevent subsequent tests elsewhere from being affected. Change-Id: I4c5791223e7fd21e04dcd095daa7d868e77dbd97 
The test added for #4686 can raise for "B" missing which
is normal and should not fail the test.  Also ensure mappers are
cleared to prevent subsequent tests elsewhere from being
affected.

Change-Id: I4c5791223e7fd21e04dcd095daa7d868e77dbd97
Mutex the declarative scan/map process against configure_mappers() 2019-05-16T15:28:44+00:00 Mike Bayer mike_mp@zzzcomputing.com 2019-05-16T15:26:04+00:00 5039c6f01d0bd1f58f950e80cddf7472444a70a4 Applied the mapper "configure mutex" against the declarative class mapping process, to guard against the race which can occur if mappers are used while dynamic module import schemes are still in the process of configuring mappers for related classes. This does not guard against all possible race conditions, such as if the concurrent import has not yet encountered the dependent classes as of yet, however it guards against as much as possible within the SQLAlchemy declarative process. Fixes: #4686 Change-Id: I0349036b8078bd42265ab40862cfbfe5bf9d5b44 
Applied the mapper "configure mutex" against the declarative class mapping
process, to guard against the race which can occur if mappers are used
while dynamic module import schemes are still in the process of configuring
mappers for related classes.  This does not guard against all possible race
conditions, such as if the concurrent import has not yet encountered the
dependent classes as of yet, however it guards against as much as possible
within the SQLAlchemy declarative process.

Fixes: #4686
Change-Id: I0349036b8078bd42265ab40862cfbfe5bf9d5b44