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Tag Archives: design
The Controversial Eval Function
eval is a function in Ruby that allows you to execute arbitrary code. You pass in a string containing code, and voila! It’s very useful, for things like holding pointers of a sort to functions; but it’s also dangerous, because script-kiddies can format your hard-drive. So what’s the middle-path use-case of eval? Continue reading
Extending Acts_as_Authenticated
acts_as_authenticated is a pretty sweet plugin for managing users. But extending it proves to be a bit of a challenge. In this article, we discuss two approaches: adding methods and fields to the existing User class, and subclassing User. Subclassing separates the code from the core User code. We use single table inheritance to achieve this lofty goal. Continue reading