588 lines
22 KiB
Ruby
588 lines
22 KiB
Ruby
class ExerciseController < ApplicationController
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layout "base_courses"
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before_filter :find_exercise_and_course, :only => [:create_exercise_question, :edit, :update, :show, :destroy, :commit_exercise, :commit_answer,:publish_exercise,:republish_exercise]
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before_filter :find_course, :only => [:index,:new,:create,:student_exercise_list]
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include ExerciseHelper
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include ExerciseHelper
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def index
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remove_invalid_exercise(@course)
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@is_teacher = User.current.allowed_to?(:as_teacher,@course)
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if @is_teacher
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exercises = @course.exercises
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else
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exercises = @course.exercises.where(:exercise_status => 2)
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end
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@exercises = paginateHelper exercises,20 #分页
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respond_to do |format|
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format.html
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end
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end
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def show
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@exercise = Exercise.find params[:id]
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@is_teacher = User.current.allowed_to?(:as_teacher,@course) || User.current.admin?
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if @exercise.exercise_status != 2 && (!User.current.allowed_to?(:as_teacher,@course) || User.current.admin?)
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render_403
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return
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end
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@can_edit_excercise = (!has_commit_exercise?(@exercise.id,User.current.id)) || User.current.admin?
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@exercise_user = ExerciseUser.where("user_id=? and exercise_id=?", User.current.id, @exercise.id).first
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# 学生点击的时候即创建关联,自动保存
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#eu = ExerciseUser.create(:user_id => User.current, :exercise_id => @exercise.id, :start_at => Time.now, :status => false)
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# 已提交问卷的用户不能再访问该界面
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if has_commit_exercise?(@exercise.id, User.current.id) && (!User.current.admin?)
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respond_to do |format|
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format.html {render :layout => 'base_courses'}
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end
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else
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if !@is_teacher && !has_click_exercise?(@exercise.id, User.current.id)
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eu = ExerciseUser.create(:user_id => User.current.id, :exercise_id => @exercise.id, :start_at => Time.now, :status => false)
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@exercise_user = ExerciseUser.where("user_id=? and exercise_id=?", User.current.id, @exercise.id).first
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end
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# @percent = get_percent(@exercise,User.current)
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exercise_questions = @exercise.exercise_questions
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@exercise_questions = paginateHelper exercise_questions,5 #分页
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respond_to do |format|
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format.html {render :layout => 'base_courses'}
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end
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end
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end
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def new
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option = {
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:exercise_name => "",
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:course_id => @course.id,
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:exercise_status => 1,
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:user_id => User.current.id,
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:time => "",
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:end_time => "",
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:publish_time => "",
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:exercise_description => "",
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:show_result => "",
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:show_result => 1
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}
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@exercise = Exercise.create option
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if @exercise
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redirect_to edit_exercise_url @exercise.id
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end
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end
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def create
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if params[:exercise]
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exercise = Exercise.find(params[:exercise_id]) if params[:exercise_id]
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exercise ||= Exercise.new
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exercise.exercise_name = params[:exercise][:exercise_name]
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exercise.exercise_description = params[:exercise][:exercise_description]
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exercise.end_time = params[:exercise][:end_time]
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exercise.publish_time = params[:exercise][:publish_time]
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exercise.user_id = User.current.id
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exercise.time = params[:exercise][:time]
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exercise.course_id = params[:course_id]
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exercise.exercise_status = 1
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if exercise.save
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@exercise = exercise
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respond_to do |format|
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format.js
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end
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end
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end
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end
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def edit
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respond_to do |format|
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format.html{render :layout => 'base_courses'}
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end
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end
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def update
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@exercise.exercise_name = params[:exercise][:exercise_name]
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@exercise.exercise_description = params[:exercise][:exercise_description]
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@exercise.time = params[:exercise][:time]
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@exercise.end_time = params[:exercise][:end_time]
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@exercise.publish_time = params[:exercise][:publish_time]
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@exercise.show_result = params[:exercise][:show_result]
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if @exercise.save
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respond_to do |format|
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format.js
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end
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else
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render_404
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end
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end
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def destroy
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@is_teacher = User.current.allowed_to?(:as_teacher,@course) || User.current.admin?
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if @exercise && @exercise.destroy
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if @is_teacher
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exercises = Exercise.where("course_id =?", @course.id)
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else
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exercises = Exercise.where("course_id =? and exercise_status =?", @course.id, 2)
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end
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@exercises = paginateHelper exercises,20 #分页
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respond_to do |format|
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format.js
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end
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end
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end
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# 统计结果
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def statistics_result
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@exercise = Exercise.find(params[:id])
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exercise_questions = @exercise.exercise_questions
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@exercise_questions = paginateHelper exercise_questions, 5
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respond_to do |format|
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format.html{render :layout => 'base_courses'}
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end
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end
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# 添加题目
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# question_type 1：单选 2：多选 3：填空题
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def create_exercise_question
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question_title = params[:question_title].nil? || params[:question_title].empty? ? l(:label_enter_single_title) : params[:question_title]
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option = {
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:question_title => question_title,
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:question_type => params[:question_type] || 1,
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:question_number => params[:question_type] == "1"? @exercise.exercise_questions.where("question_type = 1").count + 1 :
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(params[:question_type] == "2" ? (@exercise.exercise_questions.where("question_type = 2").count + 1) :
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@exercise.exercise_questions.where("question_type = 3").count + 1),
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:question_score => params[:question_score]
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}
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@exercise_questions = @exercise.exercise_questions.new option
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# params[:question_answer] 题目选项
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if params[:question_answer]
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for i in 1..params[:question_answer].count
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answer = (params[:question_answer].values[i-1].nil? || params[:question_answer].values[i-1].empty?) ? l(:label_new_answer) : params[:question_answer].values[i-1]
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question_option = {
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:choice_position => i,
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:choice_text => answer
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}
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@exercise_questions.exercise_choices.new question_option
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end
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end
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# 如果是插入的话，那么从插入的这个id以后的question_num都将要+1
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if params[:quest_id]
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@is_insert = true
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if @exercise_questions.question_type == 1
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ExerciseQuestion.where("question_number>? and question_type=?",params[:quest_num].to_i, 1).update_all(" question_number = question_number + 1")
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#@exercise.exercise_questions.where("question_number > #{params[:quest_num].to_i} and question_type == 1").update_all(" question_number = question_number + 1")
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elsif @exercise_questions.question_type == 2
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ExerciseQuestion.where("question_number>? and question_type=?",params[:quest_num].to_i, 2).update_all(" question_number = question_number + 1")
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else
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ExerciseQuestion.where("question_number>? and question_type=?",params[:quest_num].to_i, 3).update_all(" question_number = question_number + 1")
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end
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# @exercise_question_num = params[:quest_num].to_i
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@exercise_questions.question_number = params[:quest_num].to_i + 1
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end
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if @exercise_questions.save
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# params[:exercise_choice] 标准答案参数
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# 问答题标准答案有三个，单独处理
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if @exercise_questions.question_type == 3
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for i in 1..params[:exercise_choice].count
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standart_answer = ExerciseStandardAnswer.new
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standart_answer.exercise_question_id = @exercise_questions.id
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standart_answer.answer_text = params[:exercise_choice].values[i-1]
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standart_answer.save
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end
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else
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standart_answer = ExerciseStandardAnswer.new
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standart_answer.exercise_question_id = @exercise_questions.id
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if @exercise_questions.question_type == 1
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standart_answer.exercise_choice_id = sigle_selection_standard_answer(params[:exercise_choice])
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else
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standart_answer.exercise_choice_id = multiselect_standard_answer(params[:exercise_choice])
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end
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standart_answer.save
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end
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respond_to do |format|
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format.js
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end
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end
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end
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# 修改题目
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# params[:exercise_question] The id of exercise_question
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# params[:question_answer] eg:A、B、C选项
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def update_exercise_question
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@exercise_question = ExerciseQuestion.find params[:exercise_question]
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@exercise_question.question_title = params[:question_title].nil? || params[:question_title].empty? ? l(:label_enter_single_title) : params[:question_title]
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@exercise_question.question_score = params[:question_score]
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# 处理选项:如果选了某个选项，那么则要删除之前的选项
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if params[:question_answer]
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@exercise_question.exercise_choices.each do |answer|
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answer.destroy unless params[:question_answer].keys.include? answer.id.to_s
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end
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for i in 1..params[:question_answer].count
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question = @exercise_question.exercise_choices.find_by_id params[:question_answer].keys[i-1]
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answer = (params[:question_answer].values[i-1].nil? || params[:question_answer].values[i-1].empty?) ? l(:label_new_answer) : params[:question_answer].values[i-1]
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if question
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question.choice_position = i
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question.choice_text = answer
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question.save
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else
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question_option = {
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:choice_position => i,
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:choice_text => answer
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}
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@exercise_question.exercise_choices.new question_option
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end
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end
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end
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# 更新标准答案
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if params[:exercise_choice]
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if @exercise_question.question_type == 3
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# 删除不合理的选项
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@exercise_question.exercise_standard_answers.each do |answer|
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answer.destroy unless params[:exercise_choice].keys.include? answer.id.to_s
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end
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for i in 1..params[:exercise_choice].count
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# 找到对应的标准答案
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question_standart = @exercise_question.exercise_standard_answers.find_by_id params[:exercise_choice].keys[i-1]
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# 标准答案值
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answer_standart = (params[:exercise_choice].values[i-1].nil? || params[:exercise_choice].values[i-1].empty?) ? l(:label_new_answer) : params[:exercise_choice].values[i-1]
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if question_standart
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question_standart.answer_text = answer_standart
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question_standart.save
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else
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standart_answer_option = {
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:answer_text => answer_standart
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}
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@exercise_question.exercise_standard_answers.new standart_answer_option
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end
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end
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else
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answer_standart = @exercise_question.exercise_standard_answers.first
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answer_standart.exercise_choice_id = @exercise_question.question_type == 1 ? sigle_selection_standard_answer(params[:exercise_choice]) : multiselect_standard_answer(params[:exercise_choice])
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answer_standart.save
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end
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@exercise_question.save
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respond_to do |format|
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format.js
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end
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end
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end
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# 删除题目
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def delete_exercise_question
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@exercise_question = ExerciseQuestion.find params[:exercise_question]
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@exercise = @exercise_question.exercise
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exercise_questions = @exercise.exercise_questions.where("question_number > #{@exercise_question.question_number}")
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exercise_questions.each do |question|
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question.question_number -= 1
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question.save
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end
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if @exercise_question && @exercise_question.destroy
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respond_to do |format|
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format.js
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end
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end
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end
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# 发布试卷
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def publish_exercise
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@exercise.exercise_status = 2
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@exercise.publish_time = Time.now
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if @exercise.save
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redirect_to exercise_index_url(:course_id=> @course.id)
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end
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end
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# 重新发布试卷
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# 重新发布的时候会删除所有的答题
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def republish_exercise
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@exercise.exercise_questions.each do |exercise_question|
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exercise_question.exercise_ansers.destroy_all
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end
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@exercise.exercise_users.destroy_all
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@exercise.exercise_status = 1
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@exercise.save
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respond_to do |format|
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format.js
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end
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end
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def student_exercise_list
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@is_teacher = User.current.allowed_to?(:as_teacher,@course) || User.current.admin?
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@exercise = Exercise.find params[:id]
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@all_exercises = @course.exercises.order("created_at desc")
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@exercise_count = @exercise.exercise_users.where('score is not NULL').count
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if @is_teacher || (!@exercise.exercise_users.where(:user_id => User.current.id).empty? && Time.parse(@exercise.end_time.to_s).strftime("%Y-%m-%d-%H-%M-%S") <= Time.now.strftime("%Y-%m-%d-%H-%M-%S"))
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@exercise_users_list = @exercise.exercise_users.where('score is not NULL')
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@show_all = true;
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elsif !@exercise.exercise_users.where(:user_id => User.current.id).empty? && Time.parse(@exercise.end_time.to_s).strftime("%Y-%m-%d-%H-%M-%S") > Time.now.strftime("%Y-%m-%d-%H-%M-%S")
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@exercise_users_list = @exercise.exercise_users.where("user_id = ? and score is not NULL",User.current.id)
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else
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@exercise_users_list = []
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end
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respond_to do |format|
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format.html
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end
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end
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# 学生提交答卷，选中答案的过程中提交
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def commit_answer
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eq = ExerciseQuestion.find(params[:exercise_question_id])
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# 已提交过的则不允许答题
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if has_commit_exercise?(@exercise.id,User.current.id) && (!User.current.admin?)
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render :json => {:text => "failure"}
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return
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end
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if eq.question_type == 1
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# 单选题
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ea = ExerciseAnswer.find_by_exercise_question_id_and_user_id(params[:exercise_question_id],User.current.id)
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if ea.nil?
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# 尚未答该题，添加答案
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ea = ExerciseAnswer.new
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ea.user_id = User.current.id
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ea.exercise_question_id = params[:exercise_question_id]
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end
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#修改该题对应答案
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ea.exercise_choice_id = params[:exercise_choice_id]
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if ea.save
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# 保存成功返回成功信息及当前以答题百分比
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@percent = get_percent(@exercise,User.current)
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render :json => {:text => "ok" ,:percent => format("%.2f" ,@percent)}
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else
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#返回失败信息
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render :json => {:text => "failure"}
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end
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elsif eq.question_type == 2
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#多选题
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ea = ExerciseAnswer.find_by_exercise_choice_id_and_user_id(params[:exercise_choice_id],User.current.id)
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if ea.nil?
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#尚未答该题，添加答案
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ea = ExerciseAnswer.new
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ea.user_id = User.current.id
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ea.exercise_question_id = params[:exercise_question_id]
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ea.exercise_choice_id = params[:exercise_choice_id]
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if ea.save
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@percent = get_percent(@exercise,User.current)
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render :json => {:text => "ok",:percent => format("%.2f" ,@percent)}
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else
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render :json => {:text => "failure"}
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end
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else
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#pv不为空，则当前选项之前已被选择，再次点击则是不再选择该项，故删除该答案
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if ea.delete
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@percent = get_percent(@exercise, User.current)
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render :json => {:text => "false" ,:percent => format("%.2f" , @percent)}
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else
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render :json => {:text => "failure"}
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end
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end
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elsif eq.question_type == 3
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#单行文本，多行文本题
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ea = ExerciseAnswer.find_by_exercise_question_id_and_user_id(params[:exercise_question_id], User.current.id)
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if ea.nil?
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# ea为空之前尚未答题，添加答案
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if params[:answer_text].nil? || params[:answer_text].blank?
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#用户提交空答案，视作不作答
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@percent = get_percent(@exercise,User.current)
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render :json => {:text => ea.answer_text,:percent => format("%.2f", @percent)}
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else
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#添加答案
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ea = ExerciseAnswer.new
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ea.user_id = User.current.id
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ea.exercise_question_id = params[:exercise_question_id]
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ea.answer_text = params[:answer_text]
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if ea.save
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@percent = get_percent(@exercise,User.current)
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render :json => {:text => ea.answer_text,:percent => format("%.2f",@percent)}
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else
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render :json => {:text => "failure"}
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end
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end
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else
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# ea不为空说明用户之前已作答
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if params[:answer_text].nil? || params[:answer_text].blank?
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# 用户提交空答案，视为删除答案
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if ea.delete
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@percent = get_percent(@exercise,User.current)
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render :json => {:text => ea.answer_text,:percent => format("%.2f", @percent)}
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else
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render :json => {:text => "failure"}
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end
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else
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#用户修改答案
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ea.answer_text = params[:answer_text]
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if ea.save
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@percent = get_percent(@exercise,User.current)
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render :json => {:text => pv.vote_text,:percent => format("%.2f", @percent)}
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else
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render :json => {:text => "failure"}
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end
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end
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end
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else
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render :json => {:text => "failure"}
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end
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end
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# 提交问卷
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def commit_exercise
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# 老师不需要提交
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if User.current.allowed_to?(:as_teacher,@course)
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@exercise.update_attributes(:show_result => params[:show_result])
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redirect_to exercise_url(@exercise)
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# REDO: 提示提交成功
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else
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# 更新提交状态
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@exercise.exercise_users.first.update_attributes(:status => true)
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# 答题过程中需要统计完成量
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@uncomplete_question = get_uncomplete_question(@exercise, User.current)
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# 获取改学生的考试得分
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@score = calculate_student_score(@exercise, User.current)
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# @score = 100
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if @uncomplete_question.count < 1
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# 查看是否有已提交记录
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||
eu = get_exercise_user(@exercise.id, User.current.id)
|
||
eu.user_id = User.current.id
|
||
eu.exercise_id = @exercise.id
|
||
eu.score = @score
|
||
if eu.save
|
||
#redirect_to poll_index_path(:polls_group_id => @course.id,:polls_type => 'Course')
|
||
@status = 0 #提交成功
|
||
else
|
||
@status = 2 #未知错误
|
||
end
|
||
else
|
||
@status = 1 #有未做得必答题
|
||
end
|
||
respond_to do |format|
|
||
format.js
|
||
end
|
||
end
|
||
end
|
||
|
||
# 计算学生得分
|
||
def calculate_student_score(exercise, user)
|
||
score = 0
|
||
score1 = 0
|
||
score2 = 0
|
||
score3 = 0
|
||
exercise_qustions = exercise.exercise_questions
|
||
exercise_qustions.each do |question|
|
||
answer = get_user_answer(question, user)
|
||
standard_answer = get_user_standard_answer(question, user)
|
||
unless answer.nil?
|
||
# 问答题有多个答案
|
||
if question.question_type == 3
|
||
if standard_answer.include?(answer.first.answer_text)
|
||
score1 = score+ question.question_score unless question.question_score.nil?
|
||
end
|
||
elsif question.question_type == 1
|
||
if answer.first.exercise_choice.choice_position == standard_answer.exercise_choice_id
|
||
score2 = score + question.question_score unless question.question_score.nil?
|
||
end
|
||
else
|
||
arr = get_mulscore(question, user)
|
||
if arr.to_i == standard_answer.exercise_choice_id
|
||
score3 = score + question.question_score unless question.question_score.nil?
|
||
end
|
||
# ecs = ExerciseAnswer.where("user_id =? and exercise_question_id =?", user.id, question.id)
|
||
# arr = []
|
||
# ecs.each do |ec|
|
||
# arr << ec.exercise_choice.choice_position
|
||
# end
|
||
# arr.sort
|
||
# arr = arr.join("")
|
||
# if arr.to_i == standard_answer.exercise_choice_id
|
||
# score3 = score + question.question_score unless question.question_score.nil?
|
||
# end
|
||
end
|
||
end
|
||
end
|
||
score = score1 + score2 + score3
|
||
end
|
||
|
||
private
|
||
|
||
# ExerciseUser记录用户是否已提交问卷有对应的记录则已提交，没有则新建一个
|
||
def get_exercise_user exercise_id,user_id
|
||
eu = ExerciseUser.find_by_exercise_id_and_user_id(exercise_id,user_id)
|
||
if eu.nil?
|
||
eu = ExerciseUser.new
|
||
end
|
||
eu
|
||
end
|
||
|
||
#获取未完成的题目
|
||
def get_uncomplete_question exercise,user
|
||
all_questions = exercise.exercise_questions
|
||
uncomplete_question = []
|
||
all_questions.each do |question|
|
||
answers = get_user_answer(question, user)
|
||
if answers.nil?
|
||
uncomplete_question << question
|
||
end
|
||
end
|
||
uncomplete_question
|
||
end
|
||
|
||
# 获取当前学生回答问题的答案
|
||
def get_user_answer(question,user)
|
||
# user_answer = ExerciseAnswer.where("user_id=? and exercise_question_id=?", user.id, question.id).first
|
||
user_answer = question.exercise_answers.where("#{ExerciseAnswer.table_name}.user_id = #{user.id}")
|
||
user_answer
|
||
end
|
||
|
||
# 获取问题的标准答案
|
||
def get_user_standard_answer(question,user)
|
||
if question.question_type == 3
|
||
standard_answer =[]
|
||
question.exercise_standard_answers.each do |answer|
|
||
standard_answer << answer.answer_text
|
||
end
|
||
else
|
||
standard_answer = question.exercise_standard_answers.first
|
||
end
|
||
standard_answer
|
||
end # 是否完成了答题
|
||
def get_complete_question(exercise,user)
|
||
questions = exercise.exercise_questions
|
||
complete_question = []
|
||
questions.each do |question|
|
||
answers = get_user_answer(question,user)
|
||
if !(answers.nil? || answers.count < 1)
|
||
complete_question << question
|
||
end
|
||
end
|
||
complete_question
|
||
end
|
||
|
||
# 获取答题百分比
|
||
def get_percent exercise,user
|
||
complete_count = get_complete_question(exercise,user).count
|
||
if exercise.exercise_questions.count == 0
|
||
return 0
|
||
else
|
||
return (complete_count.to_f / exercise.exercise_questions.count.to_f)*100
|
||
end
|
||
end
|
||
|
||
def remove_invalid_exercise(course)
|
||
exercises = course.exercises.where("exercise_name=?","")
|
||
unless exercises.empty?
|
||
exercises.each do |exercise|
|
||
exercise.destroy
|
||
end
|
||
end
|
||
end
|
||
|
||
def find_exercise_and_course
|
||
@exercise = Exercise.find params[:id]
|
||
@course = Course.find @exercise.course_id
|
||
rescue Exception => e
|
||
render_404
|
||
end
|
||
|
||
def find_course
|
||
@course = Course.find params[:course_id]
|
||
rescue Exception => e
|
||
render_404
|
||
end
|
||
end |