Login and related data

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.