#encoding: utf-8
class ExerciseQuestion < ActiveRecord::Base
  include Redmine::SafeAttributes
  default_scope :order => 'question_number'

  belongs_to :exercise
  belongs_to :shixun
  has_many :exercise_shixun_challenges, :order => "#{ExerciseShixunChallenge.table_name}.position",:dependent => :destroy
  has_many :exercise_shixun_answers
  has_many :exercise_choices, :dependent => :destroy
  has_many :exercise_answers
  has_many :exercise_answer_comments
  has_many :exercise_standard_answers

  belongs_to :exercise_level_setting, counter_cache: true
  has_many :exercise_user_questions, :dependent => :destroy

  def question_type_name
    case self.question_type
      when 1
        "单选题"
      when 2
        "多选题"
      when 3
        "填空题"
      when 4
        "简答题"
      when 5
        "实训题"
    end
  end

  def ques_number index
    question_number = self.question_number
    if self.question_type == 5
      question_number = exercise.exercise_questions.where("question_type != 5").count + index
    end
    question_number
  end
end