1.8.0

Released: May 31, 2022

changed

[changed] [installation] Alembic 1.8 now supports Python 3.7 and above.

References: #1025
[changed] [environment] The "Pylons" environment template has been removed as of Alembic 1.8. This
template was based on the very old pre-Pyramid Pylons web framework which
has been long superseded by Pyramid.

References: #987

[feature] [typing] PEP 484 typing annotations have been added to the env.py and
revision template files within migration templates. Pull request by Nikita
Sobolev.

References: #764

[usecase] [operations] The op.drop_table() operation directive will now trigger the
before_drop() and after_drop() DDL event hooks at the table level,
which is similar to how the before_create() and after_create()
hooks are triggered by the op.create_table() directive. Note that as
op.drop_table() accepts only a table name and optional schema name, the
Table object received by the event will not have any information within
it other than the table name and schema name.

References: #1037
[usecase] [commands] Added new token epoch to the file_template option, which will
populate the integer epoch as determined by int(create_date.timestamp()).
Pull request courtesy Caio Carvalho.

References: #1027

[bug] [revisioning] Fixed issue where a downgrade using a relative revision would
fail in case of multiple branches with a single effectively
head due to interdependencies between revisions.

References: #1026
[bug] [batch] Fixed issue in batch mode where CREATE INDEX would not use a new column
name in the case of a column rename.

References: #1034