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Rails Upload Tutorial not working
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Post Rails Upload Tutorial not working 
I've tried this several times on different machines and I get the error:

undefined method `save' for DataFile:Class.

Can anyone explain this to me? I followed the instructions carefully and copied all of the code from the examples. I'm new to rails, but it seems like the tutorial should actually work.

Also, how do I call the sanitize_filename and cleanup functions at the end?

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