Models with only one entry

Are there any sweet rails conventions for dealing with models that only
have one entry in a table?

Here are the specifics of my application…

I have 3 manageable content areas on a website (3 different pages with
static content that can be edited by a site administrator).

I am creating a “Portal” model that I’m going to subclass a different
model off of for each manageable content areas (“home_portal”,
“designer_portal”, and “store_portal”) and use single table inheritance.
So, the home_portal, designer_portal, and store_portal will all inherit
from the portals table.

The table is really simple, it just has a “main content area” field and
the home_portal will use the “caption field” as well, but I’m going to
set attr_accessible on each model so they can only access the fields
that are pertinent to those pages.

Anyway, there is only going to be one entry for each model. Since there
is only one home_portal, one designer_portal, and one store_portal, I’m
only going to need one entry for each.

I’m wondering if there are any sweet ways of dealing with the single
entry for the models? Thanks in advance, I hope this post isn’t
confusing, if it is, just ask me for more info… Dustin