undefined method `stringify_keys' for Object - ruby-on-rails

Question

I am fairly new to the world of Ruby and Rails (started a week ago, my background is mostly PHP). I've got this class here which acts as a factory.
I get the following error :
undefined method `stringify_keys' for #
I understand the constructor (.new) expects a Hash instead of an object (why ?) but, although I spent a couple of hours searching the www, I didn't come up with a viable solution at this point.
I just want to inject that Soap object into my constructor. That constructor is pretty straightforward, it puts the object parameter in the instance variable that is supposed to store it.
I've been looking for methods that would turn that object into a proper Hash but all I saw was a bunch of OLD posts with rather dirty hacks. I'd rather quit programming than use them ^^.
I never thought doing this would cause a headache...
Thanks for the tips !
class WebServices::WebServiceFactory
def initialize (type, url, login, password, protocol = "soap")
#type, #protocol, #url, #login, #password = type, protocol, url, login, password
case #protocol.capitalize
when "Soap" then
requestor = WebServices::Soap::Soap.new(url, login, password)
end
#class = #type.constantize.new(requestor)
end
def getservice
return #class
end
end

Answer 1

The initialize method can accept whatever arguments you define, it doesn't need to be a Hash, and in fact, the code above it looks like you have 5 arguments that can be of any type.
Are you wanting to pass the Soap object as an argument of initialize?
If you are, something like this would do (assuming you are using your version of Ruby is >= 2.0)
class WebServices::WebServiceFactory
def initialize(requestor:, type:)
#class = type.constantize.new(requestor)
end
end
If you want this class to handle the details of creating the Soap object, maybe something like this would work for you:
module WebServices
class WebServiceFactory
SERVICES = {
soap: 'WebServices::Soap::Soap'
}
def initialize(type:, protocol: :soap, params: {})
return unless SERVICES.key?(protocol.to_sym)
requestor = SERVICES[protocol.to_sym].constantize.new(params[:url], params[:login], params[:password])
#class = type.constantize.new(requestor)
end
end
end