我如何在1.9中使用Syck在JRuby中執行YAML？

如果我在Ruby 1.9模式下運行JRuby，並告訴它使用Syck而不是Psych，則似乎沒有任何工作。我錯過了什麼嗎？我如何在1.9中使用Syck在JRuby中執行YAML？

Andrew-Grimms-MacBook-Pro:~ agrimm$ ruby --version 
jruby 1.6.1 (ruby-1.8.7-p330) (2011-05-08 3fe11da) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_24) [darwin-x86_64-java] 
Andrew-Grimms-MacBook-Pro:~ agrimm$ ruby --1.9 -S irb 
jruby-head :001 > require "yaml" 
=> true 
jruby-head :002 > YAML::ENGINE.yamler = "syck" 
=> "syck" 
jruby-head :003 > YAML::ENGINE.yamler 
=> "syck" 
jruby-head :004 > 42.to_yaml 
NameError: uninitialized constant Syck::Yecht 
    from org/jruby/RubyModule.java:2569:in `const_missing' 
    from org/jruby/RubyClass.java:218:in `allocate' 
    from /Users/agrimm/.rvm/rubies/jruby-head/lib/ruby/1.9/syck.rb:102:in `emitter' 
    from /Users/agrimm/.rvm/rubies/jruby-head/lib/ruby/1.9/syck.rb:399:in `quick_emit' 
    from /Users/agrimm/.rvm/rubies/jruby-head/lib/ruby/1.9/syck/rubytypes.rb:371:in `to_yaml' 
    from (irb):4:in `evaluate' 
    from org/jruby/RubyKernel.java:1093:in `eval' 
    from org/jruby/RubyKernel.java:1418:in `loop' 
    from org/jruby/RubyKernel.java:1205:in `catch' 
    from org/jruby/RubyKernel.java:1205:in `catch' 
    from /Users/agrimm/.rvm/rubies/jruby-head/bin/jirb:17:in `(root)'

背景：我試圖用SYCK因爲我的問題，病有心理在How do I deserialize classes in Psych?

來源

2011-05-08 Andrew Grimm

看起來像它不是在JRuby中實現。在1.9.2：

ruby-1.9.2-p180 :001 > require 'YAML' 
=> true 
ruby-1.9.2-p180 :002 > require 'YAML/syck' 
=> true

下的JRuby 1.6.2

jruby-1.6.2 :001 > require 'YAML' 
=> true 
jruby-1.6.2 :002 > require 'YAML/syck' 
LoadError: no such file to load -- YAML/syck 
    from org/jruby/RubyKernel.java:1038:in `require' 
    from (irb):2:in `evaluate' 
    from org/jruby/RubyKernel.java:1088:in `eval' 
    from /Users/matt/.rvm/rubies/jruby-1.6.2/lib/ruby/1.8/irb.rb:158:in `eval_input' 
    from /Users/matt/.rvm/rubies/jruby-1.6.2/lib/ruby/1.8/irb.rb:271:in `signal_status' 
    from /Users/matt/.rvm/rubies/jruby-1.6.2/lib/ruby/1.8/irb.rb:155:in `eval_input' 
    from org/jruby/RubyKernel.java:1419:in `loop' 
    from org/jruby/RubyKernel.java:1191:in `catch' 
    from /Users/matt/.rvm/rubies/jruby-1.6.2/lib/ruby/1.8/irb.rb:154:in `eval_input' 
    from /Users/matt/.rvm/rubies/jruby-1.6.2/lib/ruby/1.8/irb.rb:71:in `start' 
    from org/jruby/RubyKernel.java:1191:in `catch' 
    from /Users/matt/.rvm/rubies/jruby-1.6.2/lib/ruby/1.8/irb.rb:70:in `start' 
    from /Users/matt/.rvm/rubies/jruby-1.6.2/bin/irb:17:in `(root)'

雖然我（還）沒有一個使用JRuby專家，JRuby的1.6.0版本註釋說compatibility with Ruby 1.9.2 to a very high level.也許這並未不延伸到syck ..？

來源

2011-08-28 11:24:24

我如何在1.9中使用Syck在JRuby中執行YAML？

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