使用ruby 1.9.2更快速地导致错误 [英] fastercsv error with ruby 1.9.2

问题描述

我有一个现有的rails应用程序，我在ruby 1.9.2上运行，而linux的rails版本是

  rails 2.3 .8 
  

它也有一个GEMFILE，它的vendor / gems目录中有'fastercsv- 1.5.4'gem

并且在其迁移中（两次迁移），它需要gem'fastercsv'

  require'fastercsv'
  

但是当我做
$ b时$ b

  rake db：migrate 
  

请转换到Ruby 1.9的标准CSV库，它的速度更快，支持Ruby 1.9的m17n编码引擎。

我发现这条消息来自gems'faster_csv.rb'文件。因为它有条件检查ruby版本

 如果RUBY_VERSION> =1.9
 
 class FasterCSV 
 def self.const_missing（* _）
 raise NotImplementedError，请切换到Ruby 1.9的标准CSV+ 
库，它的速度更快，支持+ 
Ruby 1.9的m17n编码引擎。 
 end 
 
 def self.method_missing（* _）
 const_missing 
 end 
 
 def method_missing（* _）
 self .class.const_missing 
结束
结束
 
  - 更多代码
  

有人可以告诉我如何解决这个问题。请注意'fastercsv'没有被添加到GEMFILE中。

解决方案

我找到了我的问题的答案。 b
$ b

基于这篇文章

什么是Ruby 1.9标准的CSV库？

以及我不得不

  require'csv'
  

而非

 要求'fastercsv'
  

并将FasterCSV更改为CSV

I have an existing rails application I'm running on ruby 1.9.2 and linux its rails version is

rails 2.3.8

and it has a GEMFILE as well, in its vendor/gems directory it has 'fastercsv-1.5.4' gem
and in its migrations (in two migrations) it has required the gem 'fastercsv'

require 'fastercsv'

But when I do

rake db:migrate 

it fails the migration claiming

"Please switch to Ruby 1.9's standard CSV library. It's FasterCSV plus support for Ruby 1.9's m17n encoding engine."

and I have found out the message comes from gems 'faster_csv.rb' file. as it has a condition to check the ruby version

if RUBY_VERSION >= "1.9"

  class FasterCSV
    def self.const_missing(*_)
      raise NotImplementedError, "Please switch to Ruby 1.9's standard CSV "  +
                                 "library.  It's FasterCSV plus support for " +
                                 "Ruby 1.9's m17n encoding engine."
    end

    def self.method_missing(*_)
      const_missing
    end

    def method_missing(*_)
      self.class.const_missing
    end
  end

-- and more code

Can someone tell me how to fix this issue. Please note 'fastercsv' has not been added to the GEMFILE.

解决方案

I found the answer to my question

Its based on this post

What is Ruby 1.9 standard CSV library?

and as the solution i had to

require 'csv'

instead of

require 'fastercsv'

and change the FasterCSV to CSV

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