32 lines
958 B
Ruby
32 lines
958 B
Ruby
class ExerciseCollection < ActiveRecord::Base
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include TimeHelper
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has_many :exercise_collection_items, dependent: :delete_all
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alias_method :items, :exercise_collection_items
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has_many :exercises, through: :exercise_collection_items, inverse_of: :exercise_collections
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belongs_to :user, polymorphic: true
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def collection_statistics
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statistics = {}
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exercise_collection_items.each do |item|
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statistics[item.position] = {exercise_id: item.exercise.id, exercise_title: item.exercise.title, working_time: time_to_f(item.exercise.average_working_time)}
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end
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statistics
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end
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def average_working_time
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if exercises.empty?
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0
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else
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values = collection_statistics.values.reject { |o| o[:working_time].nil?}
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sum = values.reduce(0) {|sum, item| sum + item[:working_time]}
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sum / values.size
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end
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end
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def to_s
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"#{I18n.t('activerecord.models.exercise_collection.one')}: #{name} (#{id})"
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end
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end
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