删除插入问题

app/controllers/exercise_controller.rb

@@ -269,11 +269,23 @@ class ExerciseController < ApplicationController
   def delete_exercise_question
     @exercise_question = ExerciseQuestion.find params[:exercise_question]
     @exercise = @exercise_question.exercise
-    exercise_questions = @exercise.exercise_questions.where("question_number > #{@exercise_question.question_number}")
+
-    exercise_questions.each do |question|
+    if @exercise_question.question_type == 1
-      question.question_number -= 1
+      ExerciseQuestion.where("question_number>? and question_type=?",params[:quest_num].to_i, 1).update_all(" question_number = question_number - 1")
-      question.save
+      #@exercise.exercise_questions.where("question_number > #{params[:quest_num].to_i} and question_type == 1").update_all(" question_number = question_number + 1")
+    elsif @exercise_question.question_type == 2
+      ExerciseQuestion.where("question_number>? and question_type=?",params[:quest_num].to_i, 2).update_all(" question_number = question_number - 1")
+    else
+      ExerciseQuestion.where("question_number>? and question_type=?",params[:quest_num].to_i, 3).update_all(" question_number = question_number - 1")
     end
+    # @exercise_question_num = params[:quest_num].to_i
+    # @exercise_questions.question_number = params[:quest_num].to_i - 1
+    #
+    # exercise_questions = @exercise.exercise_questions.where("question_number > #{@exercise_question.question_number}")
+    # exercise_questions.each do |question|
+    #   question.question_number -= 1
+    #   question.save
+    # end
     if @exercise_question && @exercise_question.destroy
       respond_to do |format|
         format.js
@@ -568,7 +580,9 @@ class ExerciseController < ApplicationController
     exercises = course.exercises.where("exercise_name=?","")
     unless exercises.empty?
       exercises.each do |exercise|
-        exercise.destroy
+        if exercise.exercise_questions.empty?
+          exercise.destroy
+        end
       end
     end
   end