On Fri, 15 Sep 2006 19:13:49 +0800
lazz <[EMAIL PROTECTED]> wrote:
>
> I follow the indentities quickstart,
> and create schema like this:
>
> user_group = Table("user_group", metadata,
> Column("user_id", Integer,
> ForeignKey("tg_user.user_id"),
> primary_key=True),
> Column("group_id", Integer,
> ForeignKey("tg_group.group_id"),
> primary_key=True))
>
> class Group(ActiveMapper):
> class mapping:
> group_id = column(Integer, primary_key=True)
> group_name = column(Unicode(16), unique=True)
> users = many_to_many("User", user_group, backref="groups")
>
> class User(ActiveMapper):
> class mapping:
> user_id = column(Integer, primary_key=True)
> user_name = column(Unicode(16), unique=True)
> groups = many_to_many("Group", user_group, backref="users")
>
> But I can't make relation between user and group, I throw exception:
>
> AttributeError: 'User' object has no attribute 'groups'
>
> while I "u.groups.append(g)"
>
> How can I make the user link with group?I don't know if there's a ticket for this or anything, but the way ActiveMapper works and how many_to_many works, the default identity schema for sqlalchemy only needs (will work with) one of the two many_to_many attributes. Pick one, delete the other. Because of the backref argument, the other will be created and then things will work. Jason -- Two years ago, I generated a gpg key that expired August 24, 2006 (686FD13C). I've now generated a new one (C7EFE9F4).
signature.asc
Description: PGP signature
