Hello,
I'm running into a problem while using the very useful associable module.
Please consider this piece of code:
#########################################
from elixir import *
from elixir.ext.associable import associable
metadata.bind = 'sqlite://'
#metadata.bind.echo = True
class Tag(Entity):
name = Field(Text())
acts_as_taggable = associable(Tag)
class Article(Entity):
title = Field(Text())
acts_as_taggable('tags')
setup_all(True)
tag1 = Tag(name='python')
session.is_modified(tag1)
article = Article(title='Associable is great!')
session.is_modified(article)
#########################################
On my machine, with SQLAlchemy 0.5.2 and Elixir trunk r446, this code
fails with the following error:
Traceback (most recent call last):
File "associable_test.py", line 22, in <module>
session.is_modified(article)
File
"/opt/local/lib/python2.5/site-packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/scoping.py",
line 121, in do
return getattr(self.registry(), name)(*args, **kwargs)
File
"/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/session.py",
line 1460, in is_modified
(added, unchanged, deleted) = attr.get_history(instance, passive=passive)
File
"/opt/local/lib/python2.5/site-packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/attributes.py",
line 108, in get_history
return self.impl.get_history(instance_state(instance), **kwargs)
AttributeError: '_ProxyImpl' object has no attribute 'get_history'
session.is_modified() works fine on the Tag instance but fails on the
Article instance. It seems that the attribute created by associable
misses something. I'm not sure if I'm doing something wrong or if this
is a bug somewhere in Elixir or SQLAlchemy.
Many thanks,
Alex
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