Rails Filter records of child model based upon the parent model attribute

问题:

Following are the 1-to-M models:

class FotoGossip < ActiveRecord::Base     has_many :uploads     attr_accessible :published_at, ... end   class Upload < ActiveRecord::Base     belongs_to :foto_gossip end 

Now I want the Uploads.all with the condition :published_at NOT NULL of the corresponding upload's parent model?

回答1:

Just add this to your Upload model:

then you can get all the uploads with published foto_gossip like this:

Upload.with_published_foto_gossip  

文章来源: Rails Filter records of child model based upon the parent model attribute