我正在学习Web服务API，所以我在rails应用程序上使用Savon for SOAP。我似乎无法做一个简单的操作，比如从提供者那里获取语言列表。我做错了什么？
以下是SOAP请求GetLanguages 的链接
以下是我在irb上的代码：
2.1.2 :001 > require 'savon'
=> true
2.1.2 :002 > soap_wsdl = "https://www.betamobi.tym2sell.co.bw/service/portalservice.asmx"
=> "https://www.betamobi.tym2sell.co.bw/service/portalservice.asmx"
2.1.2 :003 > client = Savon.client(wsdl: soap_wsdl)
2.1.2 :004 > response = client.call(:get_languages)
Savon::UnknownOperationError: Unable to find SOAP operation: :get_languages
Operations provided by your service: []
from /home/sifiso/.rvm/gems/ruby-2.1.2/gems/savon-2.11.1/lib/savon/operation.rb:23:in `ensure_exists!'
from /home/sifiso/.rvm/gems/ruby-2.1.2/gems/savon-2.11.1/lib/savon/operation.rb:15:in `create'
from /home/sifiso/.rvm/gems/ruby-2.1.2/gems/savon-2.11.1/lib/savon/client.rb:32:in `operation'
from /home/sifiso/.rvm/gems/ruby-2.1.2/gems/savon-2.11.1/lib/savon/client.rb:36:in `call'
from (irb):99
from /home/sifiso/.rvm/rubies/ruby-2.1.2/bin/irb:11:in `<main>'
Savon版本为2.11.1，Rails版本为4.2.6
我终于想通了。以下内容：
soap_wsdl = "https://www.betamobi.tym2sell.co.bw/service/portalservice.asmx"
应该是：
soap_wsdl = "https://www.betamobi.tym2sell.co.bw/service/portalservice.asmx?wsdl"