Hi,
I've been trying on the new futures of composite classes of SQLAlchemy 0.7,
and I don't have any problems with the read-only default mapping. However,
just when I inherit from MutableComposite I start to get an AttributeError
exception when I set the value to None (AttributeError: type object
'MutableComposite' has no attribute 'coerce' in /sqlalchemy/ext/mutable.py",
line 386, in set). I am running SQLAlchemy version 0.7.1. My mapping and
classes are the following:
class ContactInformation(object): # this gets changed to MutableComposite
def __init__(self, *args, **kwargs):
props = ['home_page', 'phone', 'fax', 'nextel']
if len(args) > 0:
for i in range(len(args)):
kwargs[props[i]] = args[i]
self.home_page = kwargs.get('home_page', None)
self.phone = kwargs.get('phone', None)
self.fax = kwargs.get('fax', None)
self.nextel = kwargs.get('nextel', None)
def __composite_values__(self):
return self.home_page, self.phone, self.fax, self.nextel
def __setattr__(self, name, value):
object.__setattr__(self, name, value)
# the following line gets uncommented when changed to
MutableComposite
#self.changed()
def __eq__(self, other):
return other is not None and \
str(self.home_page) == str(other.home_page) and \
self.phone == other.phone and \
self.fax == other.fax and \
self.nextel == other.nextel
def __ne__(self, other):
return not self.__eq__(other)
user = Table(
'User',
metadata,
Column('ID', UUID(as_uuid=True), primary_key=True),
Column('HomePage', String(300), nullable=True),
Column('Telephone', String(30), nullable=True),
Column('Fax', String(30), nullable=True),
Column('Nextel', String(30), nullable=True)
)
class User(object):
def __init__(self, contact):
self.id = uuid.uuid1()
self.contact = contact
# If I remove the properties and synonym the error is still there
@property
def contact(self):
return self._contact
@contact.setter
def contact(self, value):
# Right in this line the error is raised when is set to None
self._contact = value
orm.mapper(User, user, properties={
'id': user.c.ID,
'_contact': orm.composite(ContactInformation, user.c.HomePage,
user.c.Telephone, user.c.Fax,
user.c.Nextel),
# I get the error with or without the synonym
'contact': orm.synonym('_contact')
})
I've simplified the real classes, but the error remains.
Anyone has an idea if I'm doing something wrong?
Thanks
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