cirandas.net

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class AvaliacoesPlugin::LearningUnit < AvaliacoesPlugin::ActiveRecord

  self.table_name = :cursos

  alias_attribute :name, :Nome

  attr_accessor :student
  attr_accessor :essay_max
  attr_accessor :multiple_choice_max

  belongs_to :responsible, foreign_key: :Responsavel, class_name: 'Student'
  belongs_to :owner, foreign_key: :Usuario, class_name: 'Student'

  has_many :discipline_units, foreign_key: :CodCursos
  has_one :discipline_unit, foreign_key: :CodCursos

  has_many :learning_unit_students, foreign_key: :CodCurso, class_name: 'LearningUnitStudent'
  has_many :students, -> { distinct }, through: :learning_unit_students

  has_many :activities, foreign_key: :CodCurso
  has_many :questions, through: :activities
  has_many :answers, -> { includes :question }, through: :questions

  def essay_grades
    return [] unless self.student
    self.student.grades.select do |g|
      g.grade.nonzero? and
      g.question.learning_unit_id == self.id and g.question.essay?
    end.sort_by{ |g| g.question.index }
  end
  def multiple_choice_grades
    return [] unless self.student
    self.student.grades.select do |g|
      g.question.learning_unit_id == self.id and g.question.multiple_choice?
    end.sort_by{ |g| g.question.index }
  end

end