Ruby on Rails

When navigating to: http://localhost:3000/users/12

Whats a good way of avoiding the error: "Couldn't find User with
ID=12", which happens when i try to display a page of user_id 12 that
doesnt exist in the database.

Instead of showing the error. id like to show a page that says: "This
user does not exist"

Someone suggested using rescue_from. Is this the best solution for
this? Or are there better alternative approaches?

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