Bump sqlalchemy from 1.3.11 to 1.4.7

[dependabot-preview[bot]]

Bumps sqlalchemy from 1.3.11 to 1.4.7.

Release notes

Sourced from sqlalchemy's releases.

1.4.7

Released: April 9, 2021

orm

• [orm] [bug] [regression] Fixed regression where the _orm.subqueryload() loader strategy would fail to correctly accommodate sub-options, such as a _orm.defer() option on a column, if the "path" of the subqueryload were more than one level deep.

  References: #6221

• [orm] [bug] [regression] Fixed regression where the _orm.merge_frozen_result() function relied upon by the dogpile.caching example was not included in tests and began failing due to incorrect internal arguments.

  References: #6211

• [orm] [bug] [regression] Fixed critical regression where the _orm.Session could fail to "autobegin" a new transaction when a flush occurred without an existing transaction in place, implicitly placing the _orm.Session into legacy autocommit mode which commit the transaction. The _orm.Session now has a check that will prevent this condition from occurring, in addition to repairing the flush issue.

  Additionally, scaled back part of the change made as part of #5226 which can run autoflush during an unexpire operation, to not actually do this in the case of a _orm.Session using legacy _orm.Session.autocommit mode, as this incurs a commit within a refresh operation.

  References: #6233

• [orm] [bug] [regression] Fixed regression where the ORM compilation scheme would assume the function name of a hybrid property would be the same as the attribute name in such a way that an AttributeError would be raised, when it would attempt to determine the correct name for each element in a result tuple. A similar issue exists in 1.3 but only impacts the names of tuple rows. The fix here adds a check that the hybrid's function name is actually present in the __dict__ of the class or its superclasses before assigning this name; otherwise, the hybrid is considered to be "unnamed" and ORM result tuples will use the naming scheme of the underlying expression.

  References: #6215

• [orm] [bug] [regression] Fixed critical regression caused by the new feature added as part of #1763, eager loaders are invoked on unexpire operations. The new feature makes use of the "immediateload" eager loader strategy as a

... (truncated)

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[dependabot-preview[bot]]

Superseded by #309.