Michael Bayer ha scritto:
> that is your own application changing the primary key of a loaded
> instance, which is a feature very old versions of SQLAlchemy did not
> support. Upgrade to any recent version of 0.4 or 0.5 and you wont
> have that issue anymore.
>
I think I don't want to change this behavior , Michael,
Simply I would like to realize that changes was done at current loaded
instance
to avoid flush it.
Here another similar error when I try to flush an instance already
flushed...
File "/usr/lib/python2.4/site-packages/sqlalchemy/ext/assignmapper.py", line
7, in do
return getattr(query, name)(*args, **kwargs)
File "/usr/lib/python2.4/site-packages/sqlalchemy/orm/query.py", line 114, in
get
key = self.mapper.identity_key(ident)
File "/usr/lib/python2.4/site-packages/sqlalchemy/orm/mapper.py", line 992,
in identity_key
return self.identity_key_from_primary_key(primary_key)
File "/usr/lib/python2.4/site-packages/sqlalchemy/orm/mapper.py", line 959,
in identity_key_from_primary_key
return (self.class_, tuple(util.to_list(primary_key)), self.entity_name)
TypeError: iteration over non-sequence
Is there any property in the instance to see its state before flushing it?
j
> On May 20, 2009, at 1:45 AM, jo wrote:
>
>
>> Hello all,
>>
>> I have the following problem.
>> While I'm working in my session, someone change my instance identity.
>>
>> I would like to avoid this.
>> Is there a way to understand if was there any change before flushing?
>>
>> This is the message:
>>
>>
>> File "/usr/lib/python2.4/site-packages/sqlalchemy/orm/mapper.py",
>> line 1078, in save_obj
>> raise exceptions.FlushError("Can't change the identity of
>> instance %s in session (existing identity: %s; new identity: %s)" %
>> (mapperutil.instance_str(obj), obj._instance_key, instance_key))
>> FlushError: Can't change the identity of instance spe...@0x5cc4590
>> in session
>> (existing identity: (<class
>> 'sicer.BASE.model.tabelleCodifica.specie.Specie'>, (u'0141',), None);
>> new identity: (<class
>> 'sicer.BASE.model.tabelleCodifica.specie.Specie'>, (u'08',), None))
>>
>>
>> thank you for any help
>>
>> j
>>
>>
>>
>
>
> >
>
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