I want to use the method sanitize() to clean up some user input before I
save it to the db. sanitize() is a helper method, so it is only usable
in templates, right?
So how can I use helper methods in the controller, or why should I not?
I could build a template like “<%=sanitize(input)-%>” and use
render_to_string, but that seems pretty hackish.
Or I could sanitize every time I output the data in a template, but that
seems like a waste of processing power.
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