使用nokogiri更新节点打开xml文件并保存

I'm trying to figure out how to open an xml file, search by an id, replace a value in the node and then resave the document.

我试图弄清楚如何打开xml文件，通过id搜索，替换节点中的值，然后重新保存文档。

my xml

我的xml

<?xml version="1.0"?>
<data>
    <user id="1370018670618">
      <email>1@1.com</email>
      <sent>false</sent>
    </user>
    <user id="1370018701357">
      <email>2@2.com</email>
      <sent>false</sent>
    </user>
    <user id="1370018769724">
      <email>3@3.com</email>
      <sent>false</sent>
    </user>
    <user id="1370028546850">
      <email>4@4.com</email>
      <sent>false</sent>
    </user>
    <user id="1370028588345">
      <email>5@5.com</email>
      <sent>false</sent>
    </user>
</data>

My code to open and find a node

我的代码打开并找到一个节点。

xml_content = File.read("/home/mike/app/users.xml")
doc = Nokogiri::XML(xml_content)
node_update = doc.search("//user[@id='1370028588345'] //sent")
node_update.inner_html ##returns value of "sent"

the part in this where I'm stuck is actually updating the node. node_update.inner_html = "true" returns a method error on inner_html. then after that saving the updated file.

我被困在这里的部分实际上是更新节点。node_update。inner_html = "true"返回inner_html上的方法错误。然后保存更新后的文件。

1 个解决方案

#1

First of all, your node_update is actually a NodeSet, not the Node that you probably think it is. You need a Node if you want to call inner_html= on it:

首先，node_update实际上是一个节点集，而不是您可能认为的节点。如果要在节点上调用inner_html=，需要一个节点:

node_update[0].inner_html = 'true'

Then writing out the updated XML is just a bit of standard file manipulating combined with a to_xml call:

然后写出更新后的XML只是一个标准的文件操作，并结合to_xml调用:

File.open('whatever.xml', 'w') { |f| f.print(doc.to_xml) }

As an aside, your input isn't valid XML. You have a </details> but no <details>.

顺便说一句，您的输入不是有效的XML。您有一个，但是没有

。

#1