1.13.0

Released: December 1, 2023

changed

[changed] [installation] Alembic 1.13 now supports Python 3.8 and above.

References: #1359

[usecase] [operations] Updated logic introduced in #151 to allow if_exists and
if_not_exists on index operations also on SQLAlchemy
1.4 series. Previously this feature was mistakenly requiring
the 2.0 series.

References: #1323
[usecase] Replaced python-dateutil with the standard library module
zoneinfo.
This module was added in Python 3.9, so previous version will been
to install the backport of it, available by installing the backports.zoneinfo
library. The alembic[tz] option has been updated accordingly.

References: #1339

[bug] [commands] Fixed issue where the alembic check command did not function correctly
with upgrade structures that have multiple, top-level elements, as are
generated from the "multi-env" environment template. Pull request courtesy
Neil Williams.

References: #1234
[bug] [autogenerate] Fixed autogenerate issue where create_table_comment() and
drop_table_comment() rendering in a batch table modify would include
the "table" and "schema" arguments, which are not accepted in batch as
these are already part of the top level block.

References: #1361
[bug] [postgresql] Additional fixes to PostgreSQL expression index compare feature.
The compare now correctly accommodates casts and differences in
spacing.
Added detection logic for operation clauses inside the expression,
skipping the compare of these expressions.
To accommodate these changes the logic for the comparison of the
indexes and unique constraints was moved to the dialect
implementation, allowing greater flexibility.

References: #1321, #1327, #1356