Score. Score for a Post. How is this calculated?

ivanrlio · 2017-12-21 09:10:45 UTC

Just curious what the ‘Score’ attribute on a user post indicates, and/or how it’s calculated. Thanks!

codinghorror · 2016-02-28 20:44:18 UTC

Used in the summarize topic function which appears on topics with more than 50 replies.

zogstrip · 2016-02-29 11:42:45 UTC

As for how it’s calculated, everything is in the ScoreCalculator class

discourse/discourse/blob/master/lib/score_calculator.rb

class ScoreCalculator

  def self.default_score_weights
    {
      reply_count: 5,
      like_score: 15,
      incoming_link_count: 5,
      bookmark_count: 2,
      avg_time: 0.05,
      reads: 0.2
    }
  end

  def initialize(weightings = nil)
    @weightings = weightings || ScoreCalculator.default_score_weights
  end

  # Calculate the score for all posts based on the weightings
  def calculate(opts = nil)
    update_posts_score(opts)

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ivanrlio · 2016-02-29 17:04:31 UTC

Great thanks for this!

fermelone · 2017-12-20 12:19:03 UTC

Very nice! but can you please provide an example with a basic use case? I don’t understand all the complex math used to calculate the score, and this is something critical for me as I want to use this to classify/rank/grade questions and answers. (unless you already have a system for this in place).

I ask this as I just saw, replied, and liked a topic, and now I have a score of 0.2, which I don’t understand as I though the score for liking weighted 15.

Thanks!

Jessica.Y · 2019-01-15 20:43:47 UTC

Same. How did you determine the default score weights to use? Why were these variables and corresponding weights chosen?

I’m trying to run a query that uses p.score in calculating Top Quality Users. The script includes users’ post scores as a factor, but I need to understand how the score is derived and weighted.