Is it possible to render a partial and force the browser not to load from cache?

I have a window and when it opens, I need to make sure that the image is its latest state.

So I thought why not..

render :partial => 'logo', :cache => false

but that's no开发者_开发技巧t really rails. Any ideas?

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Why not:

<img src="youimg.jpg?56734678">

The number would be the current time or something like that.