fix bug

app/views/exercise_questions/edit.json.jbuilder

@@ -5,4 +5,5 @@ json.partial! "exercise_questions/exercise_questions",
               choices:@exercise_choices,
               shixun_challenges: @exercise_question_shixun,
               exercise_type:1,
-              user_answer:[]
+              user_answer:[],
+              ques_position:nil

app/views/exercise_questions/show.json.jbuilder

@@ -5,4 +5,5 @@ json.partial! "exercise_questions/exercise_questions",
               choices:@exercise_choices,
               shixun_challenges: @exercise_question_shixun,
               exercise_type:1,
-              user_answer:[]
+              user_answer:[],
+              ques_position:nil

app/views/exercises/_user_exercise_info.json.jbuilder

@@ -62,7 +62,8 @@ json.exercise_questions do
                   shixun_challenges: q.exercise_shixun_challenges,
                   exercise_type: ex_type,
                   user_answer: user_ques_answers[:answered_content],
-                  shixun_type: user_ques_answers[:shixun_type]
+                  shixun_type: user_ques_answers[:shixun_type],
+                  ques_position:nil
     if user_ques_comments.count > 0
       json.question_comments do
         json.partial! "exercises/exercise_comments", question_comment:user_ques_answers[:question_comment].first

app/views/exercises/blank_exercise.json.jbuilder

@@ -11,7 +11,8 @@ json.exercise_questions do
                   choices:q.exercise_choices,
                   shixun_challenges: q.exercise_shixun_challenges,
                   exercise_type:2,
-                  user_answer:[]
+                  user_answer:[],
+                  ques_position:nil
   end
 end
 

app/views/exercises/edit.json.jbuilder

@@ -15,7 +15,8 @@ json.exercise_questions do
                   shixun_challenges: q.exercise_shixun_challenges,
                   exercise_type:1,
                   user_answer:[],
-                  shixun_type:0
+                  shixun_type:0,
+                  ques_position:nil
   end
 end
 

app/views/exercises/show.json.jbuilder

@@ -18,7 +18,8 @@ json.exercise_questions do
                   shixun_challenges: q.exercise_shixun_challenges,
                   exercise_type:1,
                   user_answer:[],
-                  shixun_type:0
+                  shixun_type:0,
+                  ques_position:nil
   end
 end