Rails - Nov 2005 - owner based authorization / passing arguments to filters.

Hi all,
I''m new to rails so this may be obvious, but...
I want to implement a simple owner-based authentication system. Every item
(there are different types of item) in the system has a field owner_id which
is a foreign key to the user table. A user has permission to edit an item if
they own the item.

So to check if a user owns an item I can do something like:

def owner?(item)
  item.user_id == session[:user_id]
end

Is there an easy way to enforce this across the whole system? Can I
implement this as a filter? Can I pass an argument to a filter i.e. the item
that is being checked, or will I need to put it in the session?

All help is greatly appreciated.

thanks,

AF


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Hi folks,

Do you know if I can use <%= error_messages_for ... %> without having a
specific activerecord object? just dump some custom messages which belong to
no specific model object...

regards
Peter