core/app/controllers/gaku/courses/exams_controller.rb
module Gaku
class Courses::ExamsController < GakuController
respond_to :html
def grading
def init_variables
@course = Course.find(params[:course_id])
@exam = Exam.find(params[:id])
@students = @course.students
@exams = if !params[:id].nil?
Exam.find_all_by_id(params[:id])
else
@course.syllabus.exams.all
end
# 試験の平均点を入れるハッシュ
@exams_average = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }
# 試験の合計点を入れるハッシュ
@student_exams_total_score = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }
# 偏差値を入れるハッシュ
@student_exams_deviation = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }
# for grade and rank--------
# １０段階用の設定
# @student_exams_grade: 生徒の１０段階を入れるHash。
@student_exams_grade = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }
# ５段階用の設定
# @student_exams_rank: 生徒の５段階を入れるHash。
@student_exams_rank = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }
end
def set_student_exams_total_scores_and_set_exams_average
@exams.each do |exam|
@students.each do |student|
# 素点用と得点用変数の初期化 --------
@student_exams_total_score[:raw][exam.id][student.id] = 0.0
@student_exams_total_score[exam.id][student.id] = 0.0
@exams_average[:raw][exam.id] = 0.0
@exams_average[exam.id] = 0.0
exam.exam_portions.each do |portion|
seps = student.exam_portion_scores.where(exam_portion_id: portion.id).first.score.to_f
@student_exams_total_score[:raw][exam.id][student.id] += seps
@student_exams_total_score[exam.id][student.id] += if exam.use_weighting
(portion.weight.to_f / 100) * seps
else
seps
end
end
# calc for average --------
@exams_average[:raw][exam.id] += @student_exams_total_score[:raw][exam.id][student.id]
@exams_average[exam.id] += @student_exams_total_score[exam.id][student.id]
end
# set Exams Average --------
if exam === @exams.last
@exams_average[:raw][exam.id] = fix_digit @exams_average[:raw][exam.id] / @students.length, 4
@exams_average[exam.id] = fix_digit @exams_average[exam.id] / @students.length, 4
end
end
end
def set_student_exams_deviaton
def get_standard_deviation(exam)
scratch_standard_deviation = 0.0
@students.each do |student|
scratch_standard_deviation += (@student_exams_total_score[exam.id][student.id] - @exams_average[exam.id])**2
end
Math.sqrt scratch_standard_deviation / @students.length
end
def get_deviation(standard_deviation, exam, student)
scratch_deviation = (@student_exams_total_score[exam.id][student.id] - @exams_average[exam.id]) / standard_deviation
if scratch_deviation.nan?
return 50
else
return fix_digit @student_exams_deviation[exam.id][student.id] * 10 + 50, 4
end
end
# start main --------
@exams.each do |exam|
standard_deviation = get_standard_deviation(exam)
# set deviations --------
@students.each do |student|
@student_exams_deviation[exam.id][student.id] = get_deviation(standard_deviation, exam, student)
end
end
end
def set_student_exams_grade_and_rank
# def method_ratio(grading_method)
def method_ratio
default_grade_level_deviation = [100, 66, 62, 58, 55, 50, 45, 37, 0]
@rank_level = [15, 20]
# default_grade_level_percent = [5, 5, 10, 10, 30, 10, 100]
default = {
# for grade ----
g10: 100,
g9: 66,
g8: 62,
# for rank----
r10: 5,
r9: 5,
r8: 10
}
default = {
grade: {
g10: 100,
g9: 66,
g8: 62
},
rank: {
r10: 5,
r9: 5,
r8: 10
}
}
# @grade_level_deviation:
# １０段階の全体評価で判定する時に使う変数。
# 決められた偏差値を基に、生徒の偏差値と比べ、その多寡で評価を行う。
# @grade_level_percent:
# １０段階の相対評価で判定する時に使う変数。
# 決められたパーセンテージを元に、生徒がクラス内で上位何％以内かを調べ、評価を行う。
@parsed_grading_method = JSON.parse grading_method.method.arguments, symbolize_names: true
@grade_level_deviation = [100, 66, 62, 58, 55, 50, 45, 37, 0]
@grade_level_percent = [5, 5, 10, 10, 30, 10, 100]
# @rank_level: ５段階を付ける時に使うパーセンテージ配列の変数。
@rank_level = [15, 20]
# Grade and Rank Calculation （ここは別途光ヶ丘の生徒評価表を参照して下さい）-------- {
# set grade and rank --------
@exams.each do |exam|
# 生徒の順位用配列を作成
exam_student_scores = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) } # 生徒の順位を出す為の変数。
# 試験毎の合計点数と生徒IDをexam_student_scoresに格納する。
@students.each do |student|
exam_student_scores[student.id] = @student_exams_total_score[exam.id][student.id]
end
# 試験のスコアを降順に並び替える
exam_student_scores = exam_student_scores.sort_by { |_key, val| -val }
# 採点方式を選択、その採点方式でGradeを決定。
grading_method = 1
grade_point = 10
case grading_method
# calc for 全体評価
when 1
@grade_level_deviation.each_with_index do |_glevel, i|
@students.each do |student|
if @grade_level_deviation[i] > @student_exams_deviation[exam.id][student.id] && @grade_level_deviation[i + 1] <= @student_exams_deviation[exam.id][student.id]
@student_exams_grade[exam.id][student.id] = grade_point
end
end
grade_point -= 1
end
# calc for 相対評価
when 2
scratch_exam_student_scores = exam_student_scores.clone
grade_limit_nums = []
@grade_level_percent.each do |glevel|
grade_limit_nums.push((@students.length * (glevel.to_f / 100)).ceil)
end
grade_limit_nums.each do |gnum|
i = 0
while i < gnum && !scratch_exam_student_scores.empty?
@student_exams_grade[exam.id][scratch_exam_student_scores.shift[0]] = grade_point
i += 1
end
grade_point -= 1
end
end
# Rank Calculation --------
# rankPoint = 5
# @students.each do |student|
# @student_exams_rank[exam.id][student.id] = 3
# end
# rankNums = []
# @rank_level.each do |rlevel|
# rankNums.push((@students.length * (rlevel.to_f / 100)).ceil)
# end
# rankNums.each do |rnum|
# i = 0
# while i < rnum && exam_student_scores.length != 0
# scoreMem = exam_student_scores.shift()
# @student_exams_rank[exam.id][scoreMem[1]] = rankPoint
# if exam_student_scores.length != 0 and scoreMem[0] == exam_student_scores[0][0]
# rnum += 1
# end
# i += 1
# end
# rankPoint -= 1
# end
# exam_student_scores.each do |score|
# if @student_exams_grade[exam.id][socre[1]] == 3
# @student_exams_rank[exam.id][score[1]] = 2
# elsif @student_exams_grade[exam.id][socre[1]] < 3
# @student_exams_rank[exam.id][score[1]] = 1
# end
# end
end
end
# start main --------
# p '@exam.grading_method.method -------'
# p @exam.grading_method
# case @exam.grading_method.method
case 'ratio'
when 'ratio'
# method_ratio(@exam.grading_method)
# method_ratio()
method = Grading::Ratio.new arguments
exam.student_score.each do |student|
results += method.grade(student, exam)
end
return results
end
end
def fix_digit(num, digit_num)
for_fix = 10**digit_num
num *= for_fix
num = if num.nan?
0
else
num.truncate.to_f / for_fix.to_f
end
num
end
# start main --------
init_variables
init_portion_scores
set_student_exams_total_scores_and_set_exams_average
set_student_exams_deviaton
set_student_exams_grade_and_rank
respond_with @exam
end
private
def init_portion_scores
@students.each do |student|
@exam.exam_portions.each do |portion|
unless portion.exam_portion_scores.pluck(:student_id).include?(student.id)
ExamPortionScore.create!(exam_portion: portion, student: student)
end
end
end
end
end
end