Module: Recommendations::Item::Similarity
- Included in:
- Recommendations::Item
- Defined in:
- lib/recommendations/item/similarity.rb
Instance Method Summary collapse
Instance Method Details
#similars(count = Recommendations.configuration.similar_count) ⇒ Object
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# File 'lib/recommendations/item/similarity.rb', line 4 def similars(count = Recommendations.configuration.similar_count) Recommendations.redis.zrange("recommendations:similars:#{id}", 0, count - 1) end |
#update_similars ⇒ Object
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# File 'lib/recommendations/item/similarity.rb', line 8 def update_similars Recommendations.redis.del("recommendations:similars:#{id}") categories.each do |category, score| items = Recommendations.redis.hgetall("recommendations:categories:#{category}") items.reject {|k, v| k == id}.each do |item, item_score| difference = (Float(item_score) - Float(score)).abs Recommendations.redis.zincrby("recommendations:similars:#{id}", difference, item) end end end |