Ruby on rails 如何从xml响应中获取/检索id_Ruby On Rails_Xml_Ruby On Rails 3_Savon

Ruby on rails 如何从xml响应中获取/检索id

ruby-on-rails xml ruby-on-rails-3

Ruby on rails 如何从xml响应中获取/检索id,ruby-on-rails,xml,ruby-on-rails-3,savon,Ruby On Rails,Xml,Ruby On Rails 3,Savon,我正在使用SavonGem获取xml信息 xml响应如下所示 "<?xml version='1.0' encoding='UTF-8'?><S:Envelope xmlns:S=\"http://schemas.xmlsoap.org/soap/envelope/\"><S:Body><Divisions xmlns=\"urn:description7a.services.chrome.com\"><responseStatus resp

我正在使用SavonGem获取xml信息

xml响应如下所示

"<?xml version='1.0' encoding='UTF-8'?><S:Envelope xmlns:S=\"http://schemas.xmlsoap.org/soap/envelope/\"><S:Body><Divisions xmlns=\"urn:description7a.services.chrome.com\"><responseStatus responseCode=\"Successful\" description=\"Successful\"/><division id=\"1\">Acura</division><division id=\"44\">Aston Martin</division><division id=\"4\">Audi</division><division id=\"45\">Bentley</division><division id=\"5\">BMW</division><division id=\"6\">Buick</division><division id=\"7\">Cadillac</division><division id=\"8\">Chevrolet</division><division id=\"9\">Chrysler</division><division id=\"11\">Dodge</division><division id=\"46\">Ferrari</division><division id=\"59\">FIAT</division><division id=\"13\">Ford</division><division id=\"15\">GMC</division><division id=\"16\">Honda</division><division id=\"17\">Hyundai</division><division id=\"18\">Infiniti</division><division id=\"19\">Isuzu</division><division id=\"20\">Jaguar</division><division id=\"21\">Jeep</division><division id=\"22\">Kia</division><division id=\"47\">Lamborghini</division><division id=\"23\">Land Rover</division><division id=\"24\">Lexus</division><division id=\"25\">Lincoln</division><division id=\"48\">Lotus</division><division id=\"53\">Maserati</division><division id=\"26\">Mazda</division><division id=\"27\">Mercedes-Benz</division><division id=\"2\">MINI</division><division id=\"29\">Mitsubishi</division><division id=\"30\">Nissan</division><division id=\"34\">Porsche</division><division id=\"57\">Ram</division><division id=\"49\">Rolls-Royce</division><division id=\"52\">Scion</division><division id=\"42\">Smart</division><division id=\"37\">Subaru</division><division id=\"38\">Suzuki</division><division id=\"56\">Tesla</division><division id=\"39\">Toyota</division><division id=\"40\">Volkswagen</division><division id=\"41\">Volvo</division></Divisions></S:Body></S:Envelope>"

它给人的感觉是

#<Nokogiri::XML::Document:0x5ea65f0 name="document" children=[#<Nokogiri::XML::Element:0x5ea6398 name="Envelope" namespace=#<Nokogiri::XML::Namespace:0x5ea6370 prefix="S" href="http://schemas.xmlsoap.org/soap/envelope/"> children=[#<Nokogiri::XML::Element:0x5ea5fc4 name="Body" namespace=#<Nokogiri::XML::Namespace:0x5ea6370 prefix="S" href="http://schemas.xmlsoap.org/soap/envelope/"> children=[#<Nokogiri::XML::Element:0x5ea5c5e name="Divisions" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> children=[#<Nokogiri::XML::Element:0x5ea592a name="responseStatus" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x5ea5858 name="responseCode" value="Successful">, #<Nokogiri::XML::Attr:0x5ea581c name="description" value="Successful">]>, #<Nokogiri::XML::Element:0x5ea518c name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x5ea515a name="id" value="1">] children=[#<Nokogiri::XML::Text:0x5ea4ad4 "Acura">]>, #<Nokogiri::XML::Element:0x5ea491c name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x5ea489a name="id" value="44">] children=[#<Nokogiri::XML::Text:0x63dc434 "Aston Martin">]>, #<Nokogiri::XML::Element:0x63dc222 name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x63dc1f0 name="id" value="4">] children=[#<Nokogiri::XML::Text:0x63dbcbe "Audi">]>, #<Nokogiri::XML::Element:0x63dbb56 name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x63dbb10 name="id" value="45">] ......

它返回了像[]

这样的空数组，我想您应该看看Nokogiri和XPAth。使用XML时，XPath是非常强大的工具。您可以找到一个使用Nokogiri+XPath的示例。您应该阅读（从上一个链接借用：））。当然，你可以在谷歌上找到很多其他的例子

PS IMHO XPath功能强大，但具有有趣的逻辑（概念），我怀疑您第一次尝试是否会得到好的结果，但值得花时间学习它。

下面是您的xml

<somexml>
  <name>Foo</name>
  <id>1</id>
</somexml>

这将为您提供您要查找的id，请查看上面提供的文档链接以获取更多帮助

可能的副本：我已编辑了我的问题，无法将我的日志放在此处，因为它太长，我面临@doc.xpath（“//somexml//id”）的问题。children.first.to_返回空数组

#<Nokogiri::XML::Document:0x5ea65f0 name="document" children=[#<Nokogiri::XML::Element:0x5ea6398 name="Envelope" namespace=#<Nokogiri::XML::Namespace:0x5ea6370 prefix="S" href="http://schemas.xmlsoap.org/soap/envelope/"> children=[#<Nokogiri::XML::Element:0x5ea5fc4 name="Body" namespace=#<Nokogiri::XML::Namespace:0x5ea6370 prefix="S" href="http://schemas.xmlsoap.org/soap/envelope/"> children=[#<Nokogiri::XML::Element:0x5ea5c5e name="Divisions" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> children=[#<Nokogiri::XML::Element:0x5ea592a name="responseStatus" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x5ea5858 name="responseCode" value="Successful">, #<Nokogiri::XML::Attr:0x5ea581c name="description" value="Successful">]>, #<Nokogiri::XML::Element:0x5ea518c name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x5ea515a name="id" value="1">] children=[#<Nokogiri::XML::Text:0x5ea4ad4 "Acura">]>, #<Nokogiri::XML::Element:0x5ea491c name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x5ea489a name="id" value="44">] children=[#<Nokogiri::XML::Text:0x63dc434 "Aston Martin">]>, #<Nokogiri::XML::Element:0x63dc222 name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x63dc1f0 name="id" value="4">] children=[#<Nokogiri::XML::Text:0x63dbcbe "Audi">]>, #<Nokogiri::XML::Element:0x63dbb56 name="division" namespace=#<Nokogiri::XML::Namespace:0x5ea5c18 href="urn:description7a.services.chrome.com"> attributes=[#<Nokogiri::XML::Attr:0x63dbb10 name="id" value="45">] ......

<S:Body>
  <Divisions xmlns="urn:description7a.services.chrome.com">
  <responseStatus responseCode="Successful" description="Successful"/>
    <division id="1">Acura</division>
    <division id="44">Aston Martin</division>
    <division id="4">Audi</division>
    <division id="45">Bentley</division>
    <division id="5">BMW</division>
    .......
  </Divisions>
</S:Body>

 @doc.xpath('//S:Envelope//S::Body//Divisions')

<somexml>
  <name>Foo</name>
  <id>1</id>
</somexml>

require 'rubygems'
require 'nokogiri'
@doc = Nokogiri::XML(File.open("test.xml"))
@doc.xpath("//somexml//id").children.first.to_s