how to define property in a module ? (for multiple inheritance)

[Chang Luo]

Hi,
In my class, I want to include multiple modules. Each module can
define its own property to persist in couchDB.

Here is an example:

module Owner
property :name
end

module Animal
property :type
end

class Cat
include Owner
include Animal
end

This doesn't work. I got this error: "undefined method `property'".
I tried added CouchRest::Model::Embeddable but it won't work for
module either. All the examples I am seeing are extending from
CouchRest::Model::Base. However, I won't be able to use this approach
because Ruby doesn't support multiple inheritance.

Any help would be appreciated. Thanks!