61 lines
1.6 KiB
Ruby
61 lines
1.6 KiB
Ruby
class Exercise < ActiveRecord::Base
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include Context
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include Creation
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after_initialize :generate_token
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after_initialize :set_default_values
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belongs_to :execution_environment
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has_many :submissions
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has_many :users, source_type: ExternalUser, through: :submissions
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scope :with_submissions, -> { where('id IN (SELECT exercise_id FROM submissions)') }
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validate :valid_main_file?
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validates :description, presence: true
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validates :execution_environment_id, presence: true
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validates :public, inclusion: {in: [true, false]}
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validates :title, presence: true
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validates :token, presence: true, uniqueness: true
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def average_percentage
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(average_score / maximum_score * 100).round if average_score
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end
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def average_score
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ActiveRecord::Base.connection.execute("SELECT AVG(score) AS average_score FROM (SELECT MAX(score) AS score FROM submissions WHERE cause = 'submit' AND exercise_id = '#{id}' GROUP BY user_id) AS maximum_scores")[0]['average_score'].to_f.round(2)
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end
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def duplicate(attributes)
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exercise = dup
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exercise.attributes = attributes
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files.each { |file| exercise.files << file.dup }
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exercise
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end
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def generate_token
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self.token ||= SecureRandom.hex(4)
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end
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private :generate_token
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def maximum_score
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files.where(role: 'teacher_defined_test').sum(:weight)
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end
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def set_default_values
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self.public ||= false
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end
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private :set_default_values
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def to_s
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title
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end
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def valid_main_file?
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if files.where(role: 'main_file').count > 1
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errors.add(:files, I18n.t('activerecord.errors.models.exercise.at_most_one_main_file'))
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end
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end
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private :valid_main_file?
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end
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