scoped_session() rather than SessionContext

[guest]

In SQLAlchemy 0.4 (svn r3498) the use of SessionContext in elixir/init.py causes a deprecation warning from SQLAlchemy.

The call to SessionContext can be replaced with a call to sqlalchemy.orm.scoped_session. All the tests still pass (except test_events, but that is a separate issue) and I see no deprecation warnings.

The patch is against r203.

[guest]

Patch to have elixir/init.py use scoped_session.

[ged]

As I said on the list, this patch is ok only for people using SA 0.4, while I 'd like to support both SA 0.4 and SA 0.3.10

[guest]

What about using sqlalchemy.version to discriminate between using SessionContext and scoped_session?

[ged]

This should be fixed now (as of r210). I used:

try: 
   import ... 
except ImportError:
   ...

This seemed more reliable and future-proof than explicit version checking.