Thoughts on CMS integration?

I am building a small/medium sized ecomm site that will be managed
through a little Rails CMS I have built. I’ve built a few CMSs in PHP
in the past… In those projects the CMS would always live in its own
directory and the public site in its own. Of course the two would
share the same DB, but their source code would be logically separated
into the front and back end.

Would this be the best way to do this in Rails as well?

I would prefer to separate the front end and back end, but I just want
others input on this and perhaps a good way to handle it. Having both
aspects of the project all in same app seems kinda messy, but I am not
that clear on how to share a database between two apps, especially
since it would seem that duplicate models would have to be in both the
front and back end apps.

Thanks

Any thoughts on this guys?

Also just to clarify, Both the front end and back end would be Rails.
I’m just wondering if putting both sets of functionality into the same
app

IE

$ rails front_end_and_back_end

Is the best way to go?

Thanks