Another Reason to Avoid constantize in Rails
Backstory Recently, a friend asked me if just calling constantize on user input was dangerous, even if subsequent code did not use the result: 1 … The constantize method in Rails turns a string into a constant. If the constant does not exist then a NameError will be raised.However, it is possible to hook into the constant lookup process in Ruby by defining a const_missing method. If a constant cannot be found in a given module, and that module has const_missing defined, then const_missing will be invoked.
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