I have a service method that takes a PaymentMethod which can either be a
CreditCard or a PayPal account. When I request the service and pass one
or the other it always comes over as a PaymentMethod; the service
doesn't seem to know that the parameter is really a CreditCard or
PayPal. Here's some sample code that illustrates what I'm talking about
more concretely:
class PaymentsApi < ActionWebService::API::Base
api_method(
:create_payment,
:expects => [
{ :payment_method => PaymentMethod }
],
:returns => [ :payment_id => :string ]
)
end
class PaymentMethod < ActionWebService::Struct
# ...
end
class CreditCard < PaymentMethod
# ...
end
class PayPal < PaymentMethod
# ...
end
I see in the request XML that it knows that the payment_method is really
a CreditCard or Invoice (note the xsi:type).
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:env="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
<env:Body>
<n1:CreatePayment xmlns:n1="urn:ActionWebService"
env:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/";>
<payment_method
xmlns:n2="http://www.ruby-lang.org/xmlns/ruby/type/custom";
xsi:type="n2:CreditCard">
...
</payment_method>
</n1:CreatePayment>
</env:Body>
</env:Envelope>
However, when I attempt to switch in the controller based on the type of
the payment_method it doesn't seem to remember that it knows this. Is
it not possible to use this type of polymorphism in service parameters
or am I doing something wrong?
Any help would be much appreciated.
Thanks in advance,
Jason
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