Finding Unassociated Records in Rails 3 with Mongoid?

Question

My question is similar to this one, except I'm trying to do this in Mongoid.

I have two models:

class ImageUpload
  include Mongoid::Document

  referenced_in :post
end

class Post 
  include Mongoid::Document

  references_many :image_uploads
end

How can I select the image uploads that are not associated with any post?

score 0 · Accepted Answer · answered Apr 05 '11 at 16:57

0

Have you tried following:

ImageUpload.where(:post_id => nil)

answered Apr 05 '11 at 16:57

rubish

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So obvious but I didn't even think of it. Thanks. – picardo Apr 06 '11 at 00:36
be sure to add :dependent => :nullify otherwise your images will still have a post_id even after the post is deleted – muirbot Jan 06 '12 at 22:38

Finding Unassociated Records in Rails 3 with Mongoid?

1 Answers1