Hi everybody,
In my project, I would like to use a table setup similar to the following one:
users= Table('users', metadata,
Column('id', Integer, primary_key=True),
Column('name', String(50)),
...
)
user_data = Table('user_data', metadata,
Column('id', Integer, ForeignKey("contexts.id"), primary_key=True),
Column('password', String(20)),
...
)
It is a one to one-relationship, because each user only has one user_data
column. It would be nice, if I could map this kind of relationship in a way
similar to the one-to-one example of the documentation. So, in my corresponding
User-object, I would like to be able to access the userData part like this, for
example:
user.userData.password
But, when I map my one-to-one relation like this:
UserData.mapper = mapper(UserData, user_data, properties = {
'id' : user_data.c.id,
'password' : user_data.c.password,
}
)
User.mapper = mapper(User, users, properties = {
'id' : users.c.id,
'name' : users.c.name,
'userData' : relation(UserData,
cascade="all, delete-orphan")
}
)
then the mapper interpretes the relationship as one-to-many, thus mapping
userData with a list like behaviour, for example:
user.userData[0].password
This is just a minor issue for me, but still... is there maybe an easy way to
tell the mapper that it is a one-to-one relationship and not one-to-many?
(I would like to avoid generating a separate primary key for my user_data (in
contrast to the user_preferences example of the docs))
... oh, and a second short question: is the SmallInteger column type broken?
Thanks and cheers,
Martin
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