Unwanted Caching

I am having a problem with Rails caching an action even though I'm in
development mode with caching disabled. I have an action that fetches a
collection of objects from the db and then passes the collection to the
view for rendering using a partial. The catch is that the db is being
updated outside the application by a rails background process. But the
db updates aren't being reflected when the view is re-rendered. The
rendering works fine the first time but the collection doesn't change
after that.

Anybody have an idea on why this caching would be taking place and how
to disable it in this instance?