Mat,
In Riak you would implement this pattern with links. Ripple helps you do
similar queries to has_many :through, but there is no automatic thing for it
yet (it needs some more thought). In the meantime, do this:
class Publisher
include Ripple::Document
many :authors
def books
authors.map {|a| a.books }.flatten
end
end
Sean Cribbs <[email protected]>
Developer Advocate
Basho Technologies, Inc.
http://basho.com/
On Feb 11, 2011, at 3:39 PM, Mat Ellis wrote:
> We're still thoroughly in an ActiveRecord mindset over here. Before we go and
> build some simple collect statements to replace a few has_many :through
> statements, is there some Ripple or Riak goodness we should be using instead?
>
> Example:
>
> * A Publisher has many Authors who have many Books
> * We want to get a set of books for a given publisher
> * In ActiveRecord we would say:
>
> # publisher.rb
> class Publisher < ActiveRecord::Base
> has_many :authors
> has_many :books, :through => authors
> end
>
> # author.rb
> class Author < ActiveRecord::Base
> belongs_to :publisher
> has_many :books
> end
>
> # book.rb
> class Book < ActiveRecord::Base
> belongs_to :author
> end
>
> Thanks
>
> M.
>
>
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