Rails - May 2007 - Newbie question; best way to store simple session data?

As a first test project, I''m writing a little Rails app that simply
lets one browse the directory structure on the server. (Obviously,
this isn''t intended for public deployment :-) ). One thing that needs
to be stored in a session is the currently browsed directory. What''s
the best way to store such simple data? (I sorta think a database
table is overkill :-) )

Thanks,
Ken


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ken wrote:
> As a first test project, I''m writing a little Rails app that
simply
> lets one browse the directory structure on the server. (Obviously,
> this isn''t intended for public deployment :-) ). One thing that
needs
> to be stored in a session is the currently browsed directory.
What''s
> the best way to store such simple data? (I sorta think a database
> table is overkill :-) )
Store it in a cookie.


-- 
Michael Wang

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Rails has a session management mechanism already built for you.  Just
use that.  Store your value in the session hash then you can just
configure Rails to store sessions either in a file (the default) or in
the database if you prefer that.

Excerpt from Agile Web Development with Rails page 105:
-----------------------------------------------------------
By default, Rails stores session information in a file on the server.
If you have
a single Rails server running, there''s no problem with this. But
imagine that
your store application gets so wildly popular that you run out of
capacity on a
single-server machine and need to run multiple boxes. The first
request from
a particular user might be routed to one back-end machine, but the
second
request might go to another. The session data stored on the first
server isn''t
available on the second; the user will get very confused as items
appear and
disappear in their cart across requests.
-----------------------------------------------------------

If you choose to store session data in the database just do this:
depot> rake db:sessions:create
exists db/migrate
create db/migrate/004_add_sessions.rb
depot> rake db:migrate

And here''s a sample of storing an object in the session:

def find_cart
  unless session[:cart]             # if there''s no cart in the
session
    session[:cart] = Cart.new   # add a new one
  end
  session[:cart] # return existing or new cart
end

On May 1, 1:34 am, Michael Wang
<rails-u...-JtyympAsP2K7zZZRDBGcUA@public.gmane.org>
wrote:
> ken wrote:
> > As a first test project, I''m writing a little Rails app that
simply
> > lets one browse the directory structure on the server. (Obviously,
> > this isn''t intended for public deployment :-) ). One thing
that needs
> > to be stored in a session is the currently browsed directory.
What''s
> > the best way to store such simple data? (I sorta think a database
> > table is overkill :-) )
>
> Store it in a cookie.
>
> --
> Michael Wang

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