markdown ActiveRecord的で范囲指定，大なり小なり比较

Posted 2021-05-05

created_atが今日以上
```
r = Time.zone.today..Float::INFINITY
Order.where(created_at: r)
```

created_atが今日以下。けどbetweenになってしまう
```
r = Date.new(0)..Time.zone.today
Order.where(created_at: r)
```