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The SQLAlchemy async mode now detects and raises an informative
error when an non asyncio compatible :term:`DBAPI` is used.
Using a standard ``DBAPI`` with async SQLAlchemy will cause
it to block like any sync call, interrupting the executing asyncio
loop.
Change-Id: I9aed87dc1b0df53e8cb2109495237038aa2cb2d4
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Reworked the proxy creation used by scoped_session() to be
based on fully copied code with augmented docstrings and
moved it into langhelpers. asyncio session, engine,
connection can now take
advantage of it so that all non-async methods are availble.
Overall implementation of most important accessors / methods
on AsyncConnection, etc. , including awaitable versions
of invalidate, execution_options, etc.
In order to support an event dispatcher on the async
classes while still allowing them to hold __slots__,
make some adjustments to the event system to allow
that to be present, at least rudimentally.
Fixes: #5628
Change-Id: I5eb6929fc1e4fdac99e4b767dcfd49672d56e2b2
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It's better, the majority of these changes look more readable to me.
also found some docstrings that had formatting / quoting issues.
Change-Id: I582a45fde3a5648b2f36bab96bad56881321899b
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`AsyncMethodRequired` is actually from
`sqlalchemy.ext.asyncio.exc`, so here it
should be referenced as `async_exc.AsyncMethodRequired`,
instead of `exc.AsyncMethodRequired`.
Fixes: #5529
Closes: #5545
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/5545
Pull-request-sha: d8f885c587dd058f909d4f3bdbec3d0fca176680
Change-Id: I6886558bfd33d3e9e283fbd60c0ec971a1f22c0c
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Using the approach introduced at
https://gist.github.com/zzzeek/6287e28054d3baddc07fa21a7227904e
We can now create asyncio endpoints that are then handled
in "implicit IO" form within the majority of the Core internals.
Then coroutines are re-exposed at the point at which we call
into asyncpg methods.
Patch includes:
* asyncpg dialect
* asyncio package
* engine, result, ORM session classes
* new test fixtures, tests
* some work with pep-484 and a short plugin for the
pyannotate package, which seems to have so-so results
Change-Id: Idbcc0eff72c4cad572914acdd6f40ddb1aef1a7d
Fixes: #3414
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