宝典：第五式 惊奇小发现之Time-ago-in-words

WEB2.0类的网站越来越多了,对于时间显示这个概念也都有不同的方法了,

类似:"刚刚","*分钟前","几天前"这些字眼也常常会见到了

于是近期老在想这个到底是怎么实现的,在一次看lovdbyless的时候不经意发现了

Time-ago-in-words 方法

用法也比较简单

<%=time_ago_in_words(from_time, include_seconds = false) %>
##include_seconds是否显示秒

看了下原码

 def distance_of_time_in_words(from_time, to_time = 0, include_seconds = false)
        from_time = from_time.to_time if from_time.respond_to?(:to_time)
        to_time = to_time.to_time if to_time.respond_to?(:to_time)
        distance_in_minutes = (((to_time - from_time).abs)/60).round
        distance_in_seconds = ((to_time - from_time).abs).round

        case distance_in_minutes
          when 0..1
            return (distance_in_minutes == 0) ? 'less than a minute' : '1 minute' unless include_seconds
            case distance_in_seconds
              when 0..4   then 'less than 5 seconds'
              when 5..9   then 'less than 10 seconds'
              when 10..19 then 'less than 20 seconds'
              when 20..39 then 'half a minute'
              when 40..59 then 'less than a minute'
              else             '1 minute'
            end

          when 2..44           then "#{distance_in_minutes} minutes"
          when 45..89          then 'about 1 hour'
          when 90..1439        then "about #{(distance_in_minutes.to_f / 60.0).round} hours"
          when 1440..2879      then '1 day'
          when 2880..43199     then "#{(distance_in_minutes / 1440).round} days"
          when 43200..86399    then 'about 1 month'
          when 86400..525599   then "#{(distance_in_minutes / 43200).round} months"
          when 525600..1051199 then 'about 1 year'
          else                      "over #{(distance_in_minutes / 525600).round} years"
        end
      end

  

      def time_ago_in_words(from_time, include_seconds = false)
        distance_of_time_in_words(from_time, Time.now, include_seconds)
      end

小弟我不学习浅不知道有没有中文显示时间差的,于是就自己在application_helper里面写了下面的转换为中文

def ch_time(from_time)
time = time-ago-in-words(from_time,include_seconds = true)

time = time.sub(/about /,"")
time = time.sub(/over /,"") 
if time.to_i == 0
case time.to_s
when 'half a minute'   then '半分钟前'
when 'less than a minute' then '不到1分钟前'
when 'less than 5 seconds'   then '5秒前'
when 'less than 10 seconds' then '10秒前'
when 'less than 20 seconds' then '20秒前'
end
else
mun = time.to_i 
case time[-3,3]
when 'nds'   then mun.to_s+'秒前'
when 'ute'   then mun.to_s+'分前'
when 'tes' then mun.to_s+'分钟前'
when 'urs','our' then mun.to_s+'小时前'
when 'day','ays' then mun.to_s+'天前'
when 'nth','ths' then mun.to_s+'个月前'
when 'ear','ars' then mun.to_s+'年前'
end
end 
end

评论

3 楼 sayid2008 2008-04-24  

收到Quake Wang的建议

先试下再说  

2 楼 QuakeWang 2008-04-24  

你可以把代码放到lib目录下面，比如localized_message.rb:

module ActionView
  module Helpers
    module DateHelper
      def distance_of_time_in_words(from_time, to_time = 0, include_seconds = false)
...

然后在environment.rb里面 require一下:

require 'localized_message'

这样在页面还是可以使用原先的api

1 楼 jiyanliang 2008-04-24  

一直想找这个方法，今天碰到了，收藏。
看来都流行读源码了！