Rails - Nov 2006 - Login and related data

I have a login with a model of "users", which I''ve been able
to get
working, with one field being "company". This is a main user who can
add
groups, so other group-users can login separately. In the groups table I 
have a user_id so I know the connection. When I have a login form for 
groups where I''ve added three fields; company, username and password. 
What I don''t know is how I define the company field? Is this right?

<label for="group_user.company">Organisation</label>
    <%= text_field "group", "user.company"
%><br/>

    <label for="group_username">Login</label>
    <%= text_field "group", "username" %><br/>

    <label for="group_password">Password</label>
    <%= password_field "group", "password"
%><br/>

How do I refere to in the login action and authenticate? And when doing 
a validate with validates_presence_of?

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Pål Bergström wrote:
> <label for="group_user.company">Organisation</label>
>     <%= text_field "group", "user.company"
%><br/>
No, you can''t do this.  Instead, set @user = @group.user
in your controller, code the field as
      <%= text_field :user, :company %>
and deal with both params[:user] and params[:group] in
your controller.  Exactly what you do depends on the
new/existing status of both the group and user records.
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