When using more complex, hierarchical models with differing settings on
how cascade deletes are handled it gets quite hard to figure out
beforehand what a delete() will exactly do with the database.
I couldn't find any way to get this piece of information (Hey
SQLAlchemy, what will be deleted if
The only deletes that aren't present in session.deleted before the flush are
those that will occur because a particular object is an orphan, and the
objects which would be deleted as a result of a cascade on that orphan.
So without orphans taken into account, session.deleted tells you
I guess the big question is, when are you calling this.
An easy system would be to add a new event flush_plan_complete which will put
you into a flush() right as the full plan has been assembled, but before any
SQL occurs. It could allow you to register more objects for activity, and it
Thanks a lot for your comprehensive answer! I was able to solve my
problem by implementing your first suggestion. Orphans do not play a
role yet… I think :-)
On 06/02/2013 05:09 PM, Michael Bayer wrote:
The only deletes that aren't present in session.deleted before the flush are
those that
The url I've been using for the 0.8 docs
(http://docs.sqlalchemy.org/en/rel_0_8/) now goes to a page listing 0.9
docs. There doesn't seem to be any way to get at 0.8's docs from the
website.
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On Sat, Jun 1, 2013 at 10:59 PM, Michael Bayer mike...@zzzcomputing.comwrote:
The recipe on the wiki also has the issue that it isn't even caching
anything to do with the QueryContext, including all of this information
regarding eager joins which is pretty important. Your modifications try to
I cant even tell what the issue is, the rel_0_8 tag is correct in git and
readthedocs is supposed to be building that tag. But its checking out master.
I'm not sure how to fix this at the moment.
On Jun 2, 2013, at 8:34 PM, Jon Rosebaugh chai...@gmail.com wrote:
The url I've been using
https://sqlalchemy.readthedocs.org/en/rel_0_8/ actually does seem to have
the correct stuff too.
On Sunday, June 2, 2013 5:43:34 PM UTC-7, Michael Bayer wrote:
I cant even tell what the issue is, the rel_0_8 tag is correct in git and
readthedocs is supposed to be building that tag. But its
They wiped everything and it should work now.
Sent from my iPhone
On Jun 3, 2013, at 12:19 AM, Jon Rosebaugh chai...@gmail.com wrote:
https://sqlalchemy.readthedocs.org/en/rel_0_8/ actually does seem to have the
correct stuff too.
On Sunday, June 2, 2013 5:43:34 PM UTC-7, Michael Bayer
Well, if that works, it certainly covers my needs so there would be no
pressing need to incorporate it into the core.
I'll let you know tomorrow.
It's so straightforward at this point I'm leaning towards some more cleanup and
adding to 0.9. I'll probably cache the compiled statements
On Mon, Jun 3, 2013 at 1:55 AM, Michael Bayer mike...@zzzcomputing.comwrote:
Well, if that works, it certainly covers my needs so there would be no
pressing need to incorporate it into the core.
I'll let you know tomorrow.
It's so straightforward at this point I'm leaning towards some more
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