Ruby on rails 铁轨坏了吗？

我正在使用活动资源将查询发送到外部API

为了避免滥用，结果会缓存一小时。以下是允许我缓存查询的代码：

    def find_with_read_through_cache(*arguments)
      logger.debug "----------------"
      logger.debug "arguments : #{arguments.join(' ')}"
      key = cache_key(arguments)
      logger.debug "key : #{key}"
      result = Rails.cache.read(key).try(:dup)
      logger.debug "result #{result}"
      logger.debug "#{key} #{result} #{self.cache_expires_in}"
      unless result
        result = find_without_read_through_cache(*arguments)
        logger.debug "write : #{Rails.cache.write(key, result, :expires_in => self.cache_expires_in)}"
      end
      result
    end

在第一个查询中，一切正常，我对每个查询都有200个请求，Rails.cache返回true：

----------------
arguments : players/ersykzer/
key : player/players/ersykzer/
result 
player/players/ersykzer/  3600
GET http://ws.maniaplanet.com:80/players/ersykzer/
--> 200 OK 109 (5376.3ms)
write : true
----------------
arguments : player/ersykzer/
key : canyonsolo/player/ersykzer/
result 
canyonsolo/player/ersykzer/  3600
GET http://ws.maniaplanet.com:80/canyon/rankings/solo/player/ersykzer/
--> 200 OK 115 (404.8ms)
write : true
----------------
arguments : player/ersykzer/
key : canyonmulti/player/ersykzer/
result 
canyonmulti/player/ersykzer/  3600
GET http://ws.maniaplanet.com:80/canyon/rankings/multiplayer/player/ersykzer/
--> 200 OK 169 (389.7ms)
write : true
----------------
arguments : zone/ {:params=>{:offset=>113, :length=>10}}
key : canyonsolo/zone//{:params=>{:offset=>113, :length=>10}}
result 
canyonsolo/zone//{:params=>{:offset=>113, :length=>10}}  3600
GET http://ws.maniaplanet.com:80/canyon/rankings/solo/zone/?length=10&offset=113
--> 200 OK 2012 (157.2ms)
write : true
----------------
arguments : zone/ {:params=>{:offset=>"2", :length=>10}}
key : canyonmulti/zone//{:params=>{:offset=>"2", :length=>10}}
result 
canyonmulti/zone//{:params=>{:offset=>"2", :length=>10}}  3600
GET http://ws.maniaplanet.com:80/canyon/rankings/multiplayer/zone/?length=10&offset=2
--> 200 OK 1849 (172.1ms)
write : true

但是，重新加载页面时，缓存中似乎有两个元素不可用：

----------------
arguments : players/ersykzer/
key : player/players/ersykzer/
result #<Player:0xaf25378>
player/players/ersykzer/ #<Player:0xaf25378> 3600
----------------
arguments : player/ersykzer/
key : canyonsolo/player/ersykzer/
result 
canyonsolo/player/ersykzer/  3600
GET http://ws.maniaplanet.com:80/canyon/rankings/solo/player/ersykzer/
--> 200 OK 115 (127.7ms)
write : true
----------------
arguments : player/ersykzer/
key : canyonmulti/player/ersykzer/
result 
canyonmulti/player/ersykzer/  3600
GET http://ws.maniaplanet.com:80/canyon/rankings/multiplayer/player/ersykzer/
--> 200 OK 169 (118.0ms)
write : true
----------------
arguments : zone/ {:params=>{:offset=>113, :length=>10}}
key : canyonsolo/zone//{:params=>{:offset=>113, :length=>10}}
result #<CanyonSolo:0xaee3180>
canyonsolo/zone//{:params=>{:offset=>113, :length=>10}} #<CanyonSolo:0xaee3180> 3600
----------------
arguments : zone/ {:params=>{:offset=>"2", :length=>10}}
key : canyonmulti/zone//{:params=>{:offset=>"2", :length=>10}}
result #<CanyonMulti:0xaeded10>
canyonmulti/zone//{:params=>{:offset=>"2", :length=>10}} #<CanyonMulti:0xaeded10> 3600

----------------
论点：玩家/易塞克斯/
键：玩家/玩家/易赛克/
结果#
游戏者/游戏者/埃塞克泽/#3600
----------------
参数：玩家/易塞克斯/
钥匙：canyonsolo/玩家/易塞克斯/
结果
canyonsolo/player/ersykzer/3600
得到http://ws.maniaplanet.com:80/canyon/rankings/solo/player/ersykzer/
-->200正常115（127.7毫秒）
写：对
----------------
参数：玩家/易塞克斯/
键：canyonmulti/player/ersykzer/
结果
canyonmulti/player/ersykzer/3600
得到http://ws.maniaplanet.com:80/canyon/rankings/multiplayer/player/ersykzer/
-->200正常169（118.0毫秒）
写：对
----------------
参数：zone/{:params=>{:offset=>113，：length=>10}
键：canyonsolo/zone/{:params=>{:offset=>113，：length=>10}
结果#
canyonsolo/zone/{:params=>{:offset=>113，：length=>10}}}3600
----------------
参数：zone/{:params=>{:offset=>“2”，：length=>10}
键：canyonmulti/zone/{:params=>{:offset=>“2”，“:length=>10}
结果#
canyonmulti/zone/{:params=>{:offset=>“2”，：length=>10}}

如您所见，两个元素

canyonsolo/player/ersykzer/

和

canyonmulti/player/ersykzer/

，尽管使用了相同的键，但缓存不会返回。

---

为什么它不起作用？（rails 3.1）

从rails 3.1升级到3.2.0后，它可以正常工作。我的代码中没有任何更改。这似乎是rails的一个bug。

您试图缓存的值是nil吗？不是，相反，它是一个大的XMLIt>1mb吗？您使用的是什么缓存存储？顺便说一下，与此相关的是Marshal.dump（object_to_be_cached）的大小。不，它很小，大约300字节。