Question

我试图创建一个条件，如果@challenge.deadline（这是Date）在上周（即最后7天）内，那么 x < / em>，否则 y 。

我试过了：

if @challenge.deadline < 1.week.ago #2017-03-03 01:52:13 -0500 if @challenge.deadline < 7.days.ago.to_date #2017-03-03 if @challenge.deadline < Date.current-7.days #2017-03-03 # All these come up false since I guess it sees 06 as more than 03, but I want the conditional to be based on date such as 06 is less than 7 days ago and therefore should be true

在此示例中，@challenge.deadline等于2017-03-06

Answer 1

当@challenge.deadline是过去7天内发生的日期时，如何触发条件？

“在过去7天内”描述的范围来自：

Date.current - 7 #=> Fri, 03 Mar 2017

为：

Date.current     #=> Fri, 10 Mar 2017

要检查@challenge.deadline是否在这些范围内，您可以使用between?：

today = Date.current
if @challenge.deadline.between?(today - 7, today)
  # within last 7 days
else
  # either before of after
end

您可以使用today - 7或today - 7.days代替today - 1.week。

或者，使用实际范围：

today = Date.current
last_week = (today - 7)..today

if last_week.cover?(@challenge.deadline)
  # ...
else
  # ...
end

如果您经常需要此功能，您还可以考虑修补Date：

class Date
  def within_last?(duration, date = Date.current)
    between?(date - duration, date)
  end
end

并通过以下方式检查：

if @challenge.deadline.within_last?(1.week)
  # ...
else
  # ...
end

Answer 2

if @challenge.deadline.to_date < 1.week.ago.to_date
    do X
else
    do Y
end

如果日期不到一周前有条件？

2 个答案: