Bump sqlalchemy from 1.3.12 to 1.3.15

[dependabot-preview]

Bumps sqlalchemy from 1.3.12 to 1.3.15.

Release notes

Sourced from sqlalchemy's releases.

1.3.15

Released: March 11, 2020

orm

• [orm] [bug] Adjusted the error message emitted by Query.join() when a left hand side can't be located that the Query.select_from() method is the best way to resolve the issue. Also, within the 1.3 series, used a deterministic ordering when determining the FROM clause from a given column entity passed to Query so that the same expression is determined each time.

  References: #5194

• [orm] [bug] Fixed regression in 1.3.14 due to #4849 where a sys.exc_info() call failed to be invoked correctly when a flush error would occur. Test coverage has been added for this exception case.

  References: #5196

1.3.14

Released: March 10, 2020

general

• [general] [bug] [py3k] Applied an explicit "cause" to most if not all internally raised exceptions that are raised from within an internal exception catch, to avoid misleading stacktraces that suggest an error within the handling of an exception. While it would be preferable to suppress the internally caught exception in the way that the __suppress_context__ attribute would, there does not as yet seem to be a way to do this without suppressing an enclosing user constructed context, so for now it exposes the internally caught exception as the cause so that full information about the context of the error is maintained.

  References: #4849

orm

• [orm] [bug] Fixed regression caused in 1.3.13 by #5056 where a refactor of the ORM path registry system made it such that a path could no longer be compared to an empty tuple, which can occur in a particular kind of joined eager loading path. The "empty tuple" use case has been resolved so that the path registry is compared to a path registry in all cases; the PathRegistry object itself now implements __eq__() and

... (truncated)

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