Savon using built in request builder instead of raw xml - ruby-on-rails

Question

If i use savon with raw xml everything works fine, this is the raw xml example:
request = client.call(:authenticate, xml:'<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="xxxx/">
<SOAP-ENV:Body>
<ns1:authenticate>
<ns1:username>user</ns1:username>
<ns1:password>pwd</ns1:password>
<ns1:cultureInfo>it</ns1:cultureInfo>
</ns1:authenticate>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>')
If I use the builtin method to call the method I got an error, this is the code:
credentials={ username: 'user', password: 'pwd!!', cultureInfo: "it" }
response = client.call(:authenticate, message: credentials)
This is the xml produced by the above code:
<?xml version="1.0" encoding="UTF-8"?>
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:wsdl="http://tempuri.org/"
xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Body>
<wsdl:authenticate>
<username>user</username>
<password>pwd</password>
<cultureInfo>it</cultureInfo>
</wsdl:authenticate>
</env:Body>
</env:Envelope>
Any Idea?

Answer 1

I usually do just this (untested). It's not pretty but it works.
credentials = { 'ns1:username' => 'user',
'ns1:password' => 'pwd!!',
'ns1:cultureInfo' => "it" }
response = client.call(:authenticate, message: credentials)
You might want to adapt the use of ns1 to the actually used namespace in your case.