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require 'rubygems'
require 'bundler'
Bundler.require
def main
client = Mongo::MongoClient.new
db = client['final7']
images_collection = db['images']
albums_collection = db['albums']
albums = albums_collection.aggregate([
{ '$unwind': '$images' },
{ '$project': { '_id': '$images' } },
{ '$group': { '_id': '$_id', count: { '$sum': 1 } } },
])
used_images = albums.reduce({}) do |memo, image|
memo[image['_id']] = true
memo
end
images = images_collection.find().to_a
deleted = 0
images.each do |image|
image_id = image['_id']
if used_images.key?(image_id) == false
puts "Deleting: #{image_id}"
#images_collection.remove("_id": image_id)
deleted += 1
end
end
puts "USED: #{used_images.size}"
puts "DELETED: #{deleted}"
end
main
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