Question

我尝试了类似......

<%= Date.current.next_week.monday %>
<%= Date.current.next_week.tuesday %>
<%= Date.current.next_week.wednesday %>
<%= Date.current.next_week.thursday %>
<%= Date.current.next_week.friday %>

获取错误：ActionView::Template::Error (undefined method 'tuesday' for Mon, 17 Apr 2017:Date):

截至今天的日期，日期将是......

Apr 17
Apr 18
Apr 19
Apr 20
Apr 21

-

不重复（我不认为）。我尝试了那些答案。我无法在视图中呈现适当的日子。

Answer 1

next_week的语法需要调整：

# Works
<%= Date.current.next_week(:tuesday) %>

要了解原始方法无效的原因：monday和sunday恰好恰好在DateAndTime::Calculations上定义，但一周中的其他日子不是。{ / p>

Answer 2

如果您需要使用纯Ruby，这是获得它的简单方法：

date减去cwday（日历周日）为您提供＆＃34;上周日＆＃34;
＆＃34;上周日+ 8＆＃34;给你＆＃34;下周一＆＃34;。

require 'date'

def next_week(date, day = :monday)
  days = %w(monday tuesday wednesday thursday friday saturday sunday)
  date - date.cwday + 8 + days.index(day.to_s.downcase).to_i
end

puts next_week(Date.today)
# 2017-04-17
puts next_week(Date.today, :friday)
# 2017-04-21
puts next_week(Date.new(2017,4,16))
# 2017-04-17
puts next_week(Date.new(2017,4,17))
# 2017-04-24

对于您的问题，您可以使用：

next_monday = next_week(Date.today)
puts working_days_next_week = Array.new(5){ |i| next_monday + i }
# 2017-04-17
# 2017-04-18
# 2017-04-19
# 2017-04-20
# 2017-04-21

如何获得下周的一周？

2 个答案: