Method: Conductor::Weights.compute

Defined in:
lib/conductor/weights.rb

.compute(group_name, alternatives) ⇒ Object

Computes the weights for a group based on the attribute for weighting and activity for the inclusion period.

If no conversions have taken place yet for a group, all alternatives are weighted equally.

TODO: add notification table and all notification if there are no conversions and we are out of the equalization period



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# File 'lib/conductor/weights.rb', line 34

def compute(group_name, alternatives)
  Conductor::Experiment::Weight.delete_all(:group_name => group_name)
  
  data = []
  equalization_period_data = Conductor::Experiment::Daily.find_equalization_period_stats_for(group_name, alternatives)
  post_equalization_data = Conductor::Experiment::Daily.find_post_equalization_period_stats_for(group_name, alternatives)

  # handle all post_equalization_data
  max_weight = 0
  unless post_equalization_data.empty?
    total = post_equalization_data.sum_it(Conductor.attribute_for_weighting)
    data = (total > 0) ? compute_weights(post_equalization_data, total, max_weight) : assign_equal_weights(post_equalization_data)
  end

  # add weights for recently launched
  weight_recently_launched(data, max_weight, equalization_period_data) unless equalization_period_data.empty?
  
  # add to database
  update_weights_in_db(group_name, data)
end