On Sat, Jan 17, 2009 at 3:40 AM, Michael Bayer <[email protected]> wrote:
> On Jan 16, 2009, at 6:13 PM, Tomasz Nazar wrote:
>
>>
>> Do I have control over this behaviour? Or am I doing sth wrong?
>> Thanks for any help..Tomasz
>
>
> you can ! its an exposed internal API but its pretty stable for
> now. Build a SessionExtension like this:
>
> from sqlalchemy.orm.interfaces import SessionExtension
>
> class SetupDependencyExt(SessionExtension):
> def before_flush(self, session, flush_context, instances):
> flush_context.register_dependency(class_mapper(A),
> class_mapper(B))
>
> where "A" is the mapper that should execute first. then configure
> that extension with your sessionmaker(extension=SetupDependencyExt()).
Hi Mike,
I'm migrating from 0.4 to 0.6 and this API has been removed - at least
looks like this. Is there any replacement?
I'd still like SQLA to generate some INSERT statements before others,
as it looks SQLA0.4 could'nt handle mappers/relations/dependencies I
have...
This code worked well for me till now...
Code I have is:
sessionmaker(...extension=SetupDependencyExt())
class SetupDependencyExt(SessionExtension):
"""http://groups.google.com/group/sqlalchemy/browse_thread/thread/2420cbf64ff5a74f
For controlling order of inserts generation for dependent children
by relation
"""
def before_flush(self, session, flush_context, instances):
flush_context.register_dependency(mapper_conference_lang,
mapper_conference_participant)
flush_context.register_dependency(mapper_conference_lang,
mapper_conference_interpreter)
AttributeError: 'UOWTransaction' object has no attribute 'register_dependency'
I'd really appreciate any help, as I can't move forward without it.
Thanks - Tomasz
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