From 27916c5d4e9946f368f777f18e2669256bad5fef Mon Sep 17 00:00:00 2001
From: cxt <853663049@qq.com>
Date: Tue, 3 Dec 2019 21:06:33 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=81=E7=A7=BB=E8=B0=83=E6=95=B4?=
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---
 db/migrate/20191203124903_add_index_to_exercise_choice.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/db/migrate/20191203124903_add_index_to_exercise_choice.rb b/db/migrate/20191203124903_add_index_to_exercise_choice.rb
index f5c8139b2..1babae48d 100644
--- a/db/migrate/20191203124903_add_index_to_exercise_choice.rb
+++ b/db/migrate/20191203124903_add_index_to_exercise_choice.rb
@@ -1,7 +1,5 @@
 class AddIndexToExerciseChoice < ActiveRecord::Migration[5.2]
   def change
-    remove_index :exercise_answers, name: :index_on_question_id_user_id
-
     change_column_default :exercise_answers, :exercise_choice_id, from: nil, to: -1
     ExerciseAnswer.where(exercise_choice_id: nil).update_all(exercise_choice_id: -1)
 
@@ -12,5 +10,7 @@ class AddIndexToExerciseChoice < ActiveRecord::Migration[5.2]
 
     add_index :exercise_answers, [:exercise_question_id, :user_id, :exercise_choice_id], name: 'exercise_choice_index', unique: true
 
+    remove_index :exercise_answers, name: :index_on_question_id_user_id
+
   end
 end