小编Ko *_*chi的帖子

我正在尝试编辑XML文件并用ruby变量替换字符串.现在这是我的代码:

<?xml version="1.0" encoding="US-ASCII"?>
<Standart-Profile>
    <class1>
        <class2>
            <class3>
               <value1>old_A</value2>
               <value1>old_B</value2>
               <value1>old_C</value2>
            </class3>
        </class2>
    </class1>
</Standart-Profile>

这是Ruby文件:

require "rexml/text"
require 'rexml/document'
include REXML

def generate_2
    ...
end

def generate_1
    ...
end


File.open('Standart-Profile.xml') do |config_file|
  config = Document.new(config_file)
  config.root.elements['old_A'].text = 'generate_1'
  config.root.elements['old_B'].text = 'generate_2'
  config.root.elements['old_C'].text = 'generate_1'

  formatter = REXML::Formatters::Default.new
  File.open('New-Profile.xml', 'w') do |result|
  formatter.write(config, result)
  end
end

但我一直收到这个错误:

Final-Tool-Kit.rb:19:in `block in <main>': undefined method `text=' for nil:NilC
lass (NoMethodError)
        from test.rb:16:in `open'
        from test.rb:16:in `<main>'