Attributes missing in an ActiveResource if they are present in self.site route

If one of attributes is present if self.site route definition of an ActiveResource class, an instantiated object will not have it in @attributes.

Example:

  class Shop < ActiveResource::Base
    self.site = "http://site.com/operators/:operator_id"
  end

After I read a shop from the server, the ActiveResource instance does not contain operator_id in @attributes, and consequently, no setter and getter methods for operator_id.

A shop belongs to an operator, the attribute is present in the xml sent and I would really expect this to happen.

Instead of @attributes the attribute is present is @prefix_options:

#<Shop:0x1819f74 @prefix_options={:operator_id=>1} ...

This happens with all attributes present in the self.site route.

If ActiveResource is supposed to mimic ActveRecord, this doesn't make sense.

Rails 2.2.2