31 Oct '16, 6pm

I just posted: “Ruby on Rails implementation of a (proper) Ranking/Popularity system” https://t.co/TCPxxr2h12

I just posted: “Ruby on Rails implementation of a (proper) Ranking/Popularity system” https://t.co/TCPxxr2h12

I was reading a blog post published recently titled "Ruby on Rails implementation of a ranking system using PostgreSQL window functions" and to be fair the purpose of the post was to introduce PostgreSQL's "ntile" window function . But in the process, the author made the same mistake I've seen time and time again. Let's assume you have a project with resources that you want to list by "popularity". It can be a Reddit-like site where people like or dislike posts or comments. It can be an e-commerce where people like or dislike products. It can be anything where people like or dislike something. The biggest error people make is to consider a simple score like this: 1 popularity = positive_votes - negative_votes

Full article: http://www.akitaonrails.com/2016/10/31/ruby-on-rails-impl...

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