Implicit order column

ActiveRecord has a class method implicit_order_column= that allows you to override the behavior of the .first and .last methods.

class User < ApplicationRecord
  self.implicit_order_column = "email"
end

User.first

User Load (3.2ms)  SELECT "users".* FROM "users" ORDER BY "users"."email" ASC, "users"."id" ASC LIMIT $1  [["LIMIT", 1]]