On 5/18/11 14:28 , neurino wrote:
now using a default template in Pyramid (pyramid_routesalchemy) I
define Session as before (except calling it DBSession and adding an
extension):
DBSession =
scoped_session(sessionmaker(extension=ZopeTransactionExtension()))
but in views.py I don't use it directly but instantiate it:
dbsession = DBSession()
root = dbsession.query(MyModel).filter(...)...
Why? What are the differences?
There is no difference. DBSession.query is exactly the same as
DBSession().query. If you want to know the details I would recommend to
read the SQLAlchemy documentation.
Moreover, what are the differences from Pyramid
import transaction
...
model = MyModel(name=u'root', value=55)
session.add(model)
session.flush()
transaction.commit()
Where do you see that in Pyramid? I would never recommend using
transactions like that. Common practice is to use repoze.tm2 or
something similar to manage your transactions at a higher layer.
Wichert.
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