Since I think rails 4 or earlier it's preferred to use `find_by(id: 4)`, but could instead be `find_by(email: "email@example.com")`, or even `find_by(first_name

Since I think rails 4 or earlier it's preferred to use `find_by(id: 4)`, but could instead be `find_by(email: "email@example.com")`, or even `find_by(first_name: "Franky', last_name: "Tomato")`. IMO returning nil instead of an exception for the above is practical for me. Much easier to work with. Having `find(4)` raising an exception is because you'll typical use it in your member actions for a controller where it's reasonable to want an exception if something can't be found. It's just Rails being Rails (practical sometimes at the expense of possible interpretation of correctness). You do have to retain stuff like this in your head, but it becomes habit pretty quickly.