如何将Ruby哈希转换为XML？ [英] How do I convert a Ruby hash to XML?

问题描述

 <？xml version =1.0encoding =UTF- 8\" >？; 
< customer> 
< email> [e-mail]< / email> 
< first_name> Joe< / first_name> 
< last_name> Blow< / last_name> 
< / customer> 
  

但是说我有一个控制器（ Ruby on Rails ）将数据发送给一个方法。我宁愿将它作为散列发送，如下所示：

 ：first_name => 'Joe'，
：last_name => 'Blow'，
：email => '[e-mail]'
  

那么，如何将哈希转换为该XML格式？

解决方案

ActiveSupport为Hash添加了一个 to_xml 方法，接近你要找的东西：

  my_hash = {：first_name => 'Joe'，：last_name => 'Blow'，：email => '[e-mail]'} 
 my_hash.to_xml（：root =>'customer'）
  

结束于：

 <？xml version =1.0encoding =UTF-8？ > 
< customer> 
< last-name> Blow< / last-name> 
< first-name> Joe< / first-name> 
< email> [e-mail]< / email> 
< / customer> 
  

请注意，下划线会转换为破折号。

Here is the specific XML I ultimately need:

<?xml version="1.0" encoding="UTF-8"?>
<customer>
  <email>[e-mail]</email>
  <first_name>Joe</first_name>
  <last_name>Blow</last_name>
</customer>

But say I have a controller (Ruby on Rails) that is sending the data to a method. I'd prefer to send it as a hash, like so:

:first_name => 'Joe',
:last_name => 'Blow',
:email => '[e-mail]'

So, how can I convert the hash to that XML format?

解决方案

ActiveSupport adds a to_xml method to Hash, so you can get pretty close to what you are looking for with this:

my_hash = { :first_name => 'Joe', :last_name => 'Blow', :email => '[e-mail]'}
my_hash.to_xml(:root => 'customer')

And end up with:

<?xml version="1.0" encoding="UTF-8"?>
<customer>  
   <last-name>Blow</last-name>  
   <first-name>Joe</first-name>  
   <email>[e-mail]</email>
</customer>

Note that the underscores are converted to dashes.

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