Filtered collections

[Lloyd Hughes]

Hi,

I have a use case where I currently keep 3 lists to store users on. Each of these lists stores users in different states. As their state changes I move them between the lists using rpoplpush. The problem I have encountered now is that I would like to be able to query the users based on other attibutes, thus using find methods on the list are slow and probably not the best solution. See my skimmed down models below

Eg:

class Campaign < Ohm:Model

      list :active, :User

      list :busy, :User

      list :offline, :User

end

class User < Ohm:Model

     reference :campaign, :Campaign

     attribute :name

     attribute :state

     attribute :email

    index :email

end

Can this be reformatted using collections rather so I can perform queries like: campaign.active.find(:email => 'f...@bar.com'), and also move the user between the 'lists'/collections by changing the :state attribute

eg:

class Campaign < Ohm:Model

      collection :active, :User, lambda { |u| u.state == 'active' }

      collection :busy, :User, lambda { |u| u.state == 'busy' }

      collection :offline, :User, lambda { |u| u.state == 'offline' }

end

class User < Ohm:Model

     reference :campaign, :Campaign

     attribute :name

     attribute :state

     attribute :email

    index :email

end

Now by changing the state attribute it will move the user between the collections without the need for rpoplpush

Any suggestions?

Thanks