Collection#findallows to fetch a model based on an expression.
find!. The first one return a nilable type, which will be
nilif not found, while the second return a model or throw an exception if not found.
[primary key column] ASCif no
order_bydirective is found. In the case of last, it will invert the direction of the order directive, turning each
DESCand vice-versa before performing the call.
5 .. 10of the query.