Bump sqlalchemy from 1.4.15 to 1.4.17

[dependabot]

Bumps sqlalchemy from 1.4.15 to 1.4.17.

Release notes

Sourced from sqlalchemy's releases.

1.4.17

Released: May 29, 2021

orm

• [orm] [bug] [regression] Fixed regression caused by just-released performance fix mentioned in #6550 where a query.join() to a relationship could produce an AttributeError if the query were made against non-ORM structures only, a fairly unusual calling pattern.

  References: #6558

1.4.16

Released: May 28, 2021

general

• [general] [bug] Resolved various deprecation warnings which were appearing as of Python version 3.10.0b1.

  References: #6540, #6543

orm

• [orm] [bug] Fixed issue when using _orm.relationship.cascade_backrefs parameter set to False, which per change_5150 is set to become the standard behavior in SQLAlchemy 2.0, where adding the item to a collection that uniquifies, such as set or dict would fail to fire a cascade event if the object were already associated in that collection via the backref. This fix represents a fundamental change in the collection mechanics by introducing a new event state which can fire off for a collection mutation even if there is no net change on the collection; the action is now suited using a new event hook _orm.AttributeEvents.append_wo_mutation().

  References: #6471

• [orm] [bug] [regression] Fixed regression involving clause adaption of labeled ORM compound elements, such as single-table inheritance discriminator expressions with conditionals or CASE expressions, which could cause aliased expressions such as those used in ORM join / joinedload operations to not be adapted correctly, such as referring to the wrong table in the ON clause in a join.

  This change also improves a performance bump that was located within the process of invoking _sql.Select.join() given an ORM attribute

... (truncated)

Commits

• See full diff in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)