Rails - Dec 2007 - Why are some methods of library accessible, while others are not? (by the example of restful_authentication)

If you have a model ''user'' generated through
restful_authentication
generator, then you should have an accessor

def current_user
 @current_user ||= ...
end

inside the file authenticated_system.rb in lib folder. If you did as
it is recommended and put ''include AuthenticatedSystem'' in
ApplicationController, then now you have an access to the method
''current_user'' in any view. The same for method
''logged_in?''.

Now try doing the same for method ''login_required'', which is
also
inside of AuthenticatedSystem module. Doesn''t work. Reads
"undefined
local variable or method ''login_required''".

Summing up, both ''logged_in?'' and
''login_required'' are inside of
Authenticated System module. ''logged_in?'' is accessible from
any view,
while ''login_required'' is not.

What''s the difference?
Thanx
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Oleg :
> If you have a model ''user'' generated through
restful_authentication
> generator, then you should have an accessor
>
> def current_user
>  @current_user ||= ...
> end
>
> inside the file authenticated_system.rb in lib folder. If you did as
> it is recommended and put ''include AuthenticatedSystem''
in
> ApplicationController, then now you have an access to the method
> ''current_user'' in any view. The same for method
''logged_in?''.
>
> Now try doing the same for method ''login_required'', which
is also
> inside of AuthenticatedSystem module. Doesn''t work. Reads
"undefined
> local variable or method ''login_required''".
>
> Summing up, both ''logged_in?'' and
''login_required'' are inside of
> Authenticated System module. ''logged_in?'' is accessible
from any view,
> while ''login_required'' is not.
>
> What''s the difference?
#current_user and #logged_in? are available as helpers in your
views because of these lines :

def self.included(base)
   base.send :helper_method, :current_user, :logged_in?
end

The ''included'' callback (called when you do "include
AuthenticatedSystem")
is responsible of this, thanks to ActionController::Base.helper_method
method.

   -- Jean-François.

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Thank you, Jean-François.

Actually, I checked application_helper.rb before I posted here. But
having found blank, I was very surprised. Didn''t know that helpers
could be created the way you showed.

Thanks again,
Happy 2008 to you and all the community,
truetype
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