needle/definition-context.rb:36:警告:取消定义`initialize'可能会导致严重问题

Question

我在导轨3.1中安装了一个新的宝石针.

它正确安装,但是当我使用命令启动rails时 rails server --debugger

我收到以下警告:

.rvm/gems/ruby-1.9.2-p290/gems/needle-1.3.0/lib/needle/definition-context.rb:36: warning: undefining `initialize' may cause serious problems
.rvm/gems/ruby-1.9.2-p290/gems/needle-1.3.0/lib/needle/definition-context.rb:36: warning: undefining 'object_id' may cause serious problems
.rvm/gems/ruby-1.9.2-p290/gems/needle-1.3.0/lib/needle/definition-context.rb:36: warning: undefining '__send__' may cause serious problems

我怎么能摆脱它？

Answer 1

问题在于针宝石本身.它这样做:

public_instance_methods -
[ "instance_eval", "object_id", "__id__", "__send__", "initialize",
  "remove_const", "method_missing", "method", "class", "inspect", "to_s",
  "instance_variables", "block_given?" ]

但是在Ruby 1.9中,该public_instance_methods方法返回的是Symbol各种对象,而不是String.那么有效的是:

[:__send__, <and other methods>] - ["__send__", <and other methods>]
=> [:__send__, <and other methods>]

什么时候不应该删除提供的那些方法Array.

这向我表明该库尚未针对Ruby 1.9进行更新(或至少已经过测试).我建议找到这个库的代码,分叉它然后应用一个补丁,使用像map(&:to_sym)修复这个问题的东西将数组转换为符号.

但请注意:可能存在其他情况,即1.8和1.9之间存在这些差异.