Add new ensure_version command

[kasium]

Closes #964

Description

Add a new command which creates the alembic_version table. Basically this was possible before by combining stamp and heads but was not nice to use. Using pure stamp is not possible.
Basically, the command does just call the _ensure_version_table method which existed before.

Checklist

This pull request is:

• A documentation / typographical error fix
  • Good to go, no issue or tests are needed
• A short code fix
  • please include the issue number, and create an issue if none exists, which
    must include a complete example of the issue. one line code fixes without an
    issue and demonstration will not be accepted.
  • Please include: Fixes: #<issue number> in the commit message
  • please include tests. one line code fixes without tests will not be accepted.
• A new feature implementation
  • please include the issue number, and create an issue if none exists, which must
    include a complete example of how the feature would look.
  • Please include: Fixes: #<issue number> in the commit message
  • please include tests.

Have a nice day!

[CaselIT]

Looks great. Could you also add changelog entry? Similar to https://github.com/sqlalchemy/alembic/blob/main/docs/build/unreleased/test_changes.rst with also a line :tickets: 964 after tags

[kasium]

Looks great. Could you also add changelog entry? Similar to https://github.com/sqlalchemy/alembic/blob/main/docs/build/unreleased/test_changes.rst with also a line :tickets: 964 after tags

So a new file in the folder?

[kasium]

Also the 3.10 tests are failing.

___________________ EnureVersionTest.test_sql_ensure_version ___________________
[gw0] linux -- Python 3.10.0 /home/runner/work/alembic/alembic/.tox/py-sqla13/bin/python
Traceback (most recent call last):
  File "/home/runner/work/alembic/alembic/tests/test_command.py", line 1216, in test_sql_ensure_version
    command.ensure_version(self.cfg, sql=True)
  File "/home/runner/work/alembic/alembic/alembic/command.py", line 662, in ensure_version
    script = ScriptDirectory.from_config(config)
  File "/home/runner/work/alembic/alembic/alembic/script/base.py", line 204, in from_config
    return ScriptDirectory(
  File "/home/runner/work/alembic/alembic/alembic/script/base.py", line 91, in __init__
    raise util.CommandError(
alembic.util.exc.CommandError: Path doesn't exist: '/home/runner/work/alembic/alembic/scratch_test_690cc903b784/scripts'.  Please use the 'init' command to create a new scripts folder.

How can I fix this?

[CaselIT]

Looks great. Could you also add changelog entry? Similar to https://github.com/sqlalchemy/alembic/blob/main/docs/build/unreleased/test_changes.rst with also a line :tickets: 964 after tags

So a new file in the folder?

yes. the name is the same as the issue number. so 964.rst

[CaselIT]

How can I fix this?

guessing here, but I think you should add cls.env = staging_env() in setup_class

[sqla-tester]

OK, this is sqla-tester setting up my work on behalf of CaselIT to try to get revision a85d2ac of this pull request into gerrit so we can run tests and reviews and stuff

[sqla-tester]

OK, this is sqla-tester setting up my work on behalf of CaselIT to try to get revision a85d2ac of this pull request into gerrit so we can run tests and reviews and stuff

[sqla-tester]

New Gerrit review created for change a85d2ac: https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/3302

[CaselIT]

thanks. will import in in gerrit so we can review properly

[sqla-tester]

mike bayer (zzzeek) wrote:

sorry for the delay here, we have a huge backlog of issues for sqlalchemy and others

View this in Gerrit at https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/3302

[sqla-tester]

mike bayer (zzzeek) wrote:

thanks!

View this in Gerrit at https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/3302

[sqla-tester]

Gerrit review https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/3302 has been merged. Congratulations! :)