socialforge/db/migrate/20170209020934_create_course_homework_statistics.rb

class CreateCourseHomeworkStatistics < ActiveRecord::Migration
  def change
    create_table :course_homework_statistics do |t|
      t.references :user
      t.references :course
      t.integer :committed_work_num, :default => 0
      t.integer :un_commit_work_num, :default => 0
      t.integer :late_commit_work_num, :default => 0
      t.integer :absence_evaluation_work_num, :default => 0
      t.integer :un_evaluation_work_num, :default => 0
      t.integer :appeal_num, :default => 0
      t.float :average_score, :default => 0
      t.float :total_score, :default => 0

      t.timestamps
    end

    count =Course.all.count / 30 + 2
    transaction do
      for i in 1 ... count do i
      Course.page(i).per(30).each do |course|
        hw_count = course.homework_commons.includes(:homework_detail_manual).where("homework_detail_manuals.comment_status > 0").count
        homework_ids = course.homework_commons.includes(:homework_detail_manual).where("homework_detail_manuals.comment_status > 0").empty? ? "(-1)" : "(" + course.homework_commons.includes(:homework_detail_manual).where("homework_detail_manuals.comment_status > 0").map{|hw| hw.id}.join(",") + ")"
        student_works = StudentWork.where("homework_common_id in #{homework_ids} and work_status !=0")
        is_eva_homeworks = course.homework_commons.includes(:homework_detail_manual).where("homework_commons.anonymous_comment = 0 and homework_detail_manuals.comment_status = 2")
        is_eva_student_works = StudentWork.where(:homework_common_id => is_eva_homeworks.map{|hw| hw.id})
        has_eva_homeworks = course.homework_commons.includes(:homework_detail_manual).where("homework_commons.anonymous_comment = 0 and homework_detail_manuals.comment_status = 3")
        has_eva_student_works = StudentWork.where(:homework_common_id => has_eva_homeworks.map{|hw| hw.id})
        course.student.each do |student|
          user = student.student
          if user
            committed_work_num = user.student_works.where("homework_common_id in #{homework_ids} and work_status != 0").count
            un_commit_work_num = (hw_count - committed_work_num) < 0 ? 0 : (hw_count - committed_work_num)
            late_commit_work_num = user.student_works.where("homework_common_id in #{homework_ids} and work_status = 2").count
            absence_evaluation_work_num = user.student_works_evaluation_distributions.where(:student_work_id => has_eva_student_works.map(&:id)).count -
                user.student_works_scores.where(:reviewer_role => 3, :student_work_id => has_eva_student_works.map(&:id)).group_by(&:student_work_id).count
            absence_evaluation_work_num = absence_evaluation_work_num < 0 ? 0 : absence_evaluation_work_num
            un_evaluation_work_num = user.student_works_evaluation_distributions.where(:student_work_id => is_eva_student_works.map(&:id)).count -
                user.student_works_scores.where(:reviewer_role => 3, :student_work_id => is_eva_student_works.map(&:id)).group_by(&:student_work_id).count
            un_evaluation_work_num = un_evaluation_work_num < 0 ? 0 : un_evaluation_work_num
            appeal_num = user.student_works_scores.where(:student_work_id => student_works.map(&:id), :appeal_status => 3).count
            average_score = user.student_works.where(:id => student_works.map(&:id)).select("AVG(student_works.work_score) as score").first ? user.student_works.where(:id => student_works.map(&:id)).select("AVG(student_works.work_score) as score").first.score : 0
            total_score = user.student_works.where(:id => student_works.map(&:id)).select("SUM(student_works.work_score) as score").first ? user.student_works.where(:id => student_works.map(&:id)).select("SUM(student_works.work_score) as score").first.score : 0
            CourseHomeworkStatistics.create(:course_id => course.id, :user_id => user.id, :committed_work_num => committed_work_num, :un_commit_work_num => un_commit_work_num,
                                           :late_commit_work_num => late_commit_work_num, :absence_evaluation_work_num => absence_evaluation_work_num, :un_evaluation_work_num => un_evaluation_work_num,
                                           :appeal_num => appeal_num, :average_score => average_score, :total_score => total_score)
          end
        end
      end
      end
    end
  end
end