We're using the links and was going to implement pretty much what you
recommend. It wouldn't seem to hard to implement this kind feature via some
meta-programming in Ripple, another one for the feature backlog maybe.
Thanks
M.
On Feb 11, 2011, at 12:56 PM, Sean Cribbs wrote:
> 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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>
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