ruby 1.9.2的fastcsv错误 [英] fastercsv error with ruby 1.9.2

问题描述

我有一个在 ruby​​ 1.9.2 和 linux 上运行的现有 rails 应用程序，它的 rails 版本是

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

rails 2.3.8

它也有一个 GEMFILE，在它的 vendor/gems 目录中它有 'fastercsv-1.5.4' gem
并且在它的迁移中(在两次迁移中)它需要 gem 'fastercsv'

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'

但是当我这样做时

rake db:migrate 

迁移声明失败

请切换到 Ruby 1.9 的标准 CSV 库.它是 FasterCSV 加上对 Ruby 1.9 的 m17n 编码引擎的支持."

我发现消息来自 gems 'faster_csv.rb' 文件.因为它有条件检查 ruby​​ 版本

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

谁能告诉我如何解决这个问题.请注意，fastercsv"尚未添加到 GEMFILE.

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

推荐答案

我找到了我的问题的答案

I found the answer to my question

基于这篇文章

什么是 Ruby 1.9 标准 CSV 库?

作为解决方案，我不得不

and as the solution i had to

require 'csv'

而不是

require 'fastercsv'

并将 FasterCSV 更改为 CSV

and change the FasterCSV to CSV

这篇关于ruby 1.9.2的fastcsv错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！