[sqlalchemy] Re: FlushError (unsaved, pending instance and is an orphan)
what's your mappers? many2one/one2many relations etc? I expected that I can create a parent-child link either from parent to child (by appending to ranker.results) or from child to parent (as above), but apparently the latter doesn't seem to work. Is this the case or something else is wrong ? George --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
[sqlalchemy] Re: FlushError (unsaved, pending instance and is an orphan)
On Apr 6, 2:52 am, svilen [EMAIL PROTECTED] wrote:
what's your mappers? many2one/one2many relations etc?
I expected that I can create a parent-child link either from parent
to child (by appending to ranker.results) or from child to parent
(as above), but apparently the latter doesn't seem to work. Is this
the case or something else is wrong ?
George
It's one2many from Ranker to Result.
class Ranker(Entity):
has_many('results', of_kind='Result', cascade='all, delete-
orphan')
# (...) other fields
class Result(Entity):
belongs_to('ranker', of_kind='Ranker',
column_kwargs=dict(nullable=False))
# (...) other fields
George
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[sqlalchemy] Re: FlushError (unsaved, pending instance and is an orphan)
On 4/6/07, George Sakkis [EMAIL PROTECTED] wrote: I'm using SA (with Elixir on top) and I have a parent Entity Ranker that has many children Results; that is, for a Ranker instance rk, rk.results gives its children and for a Result rs, rs.ranker gives its parent. When I add new children by providing the parent to the constructor of the child (rather than appending the child to rk.results) and then try to flush, I get: FlushError: instance Result at (...) is an unsaved, pending instance and is an orphan (is not attached to any parent 'Ranker' instance via that classes' 'results' attribute) Here's a (very) stripped-down version of what I'm doing: ranker = Ranker(...) for score in scores: Result(ranker=ranker, score=score, **kwds).save() session.flush() You shouldn't use .save() on your result instances because Elixir automatically adds new instances of your mapped classes to the thread's session. Or more precisely, Elixir uses the assign_mapper plugin which in turns uses the SessionContextExt mapper extension which does that. And session.flush() looks suspicious too. In Elixir, you usually either flush all pending objects using objectstore.flush() or single instances using instance.flush() I expected that I can create a parent-child link either from parent to child (by appending to ranker.results) or from child to parent (as above), but apparently the latter doesn't seem to work. Is this the case or something else is wrong ? George -- Gaëtan de Menten http://openhex.org --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
