From 6227ee65680a735400ca1bb72374ceb2d41a2e89 Mon Sep 17 00:00:00 2001
From: cxt <853663049@qq.com>
Date: Tue, 3 Dec 2019 21:03:42 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=81=E7=A7=BB=E8=B0=83=E6=95=B4?=
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---
 ...20191203124938_add_index_to_poll_answer.rb | 26 +++++++++----------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/db/migrate/20191203124938_add_index_to_poll_answer.rb b/db/migrate/20191203124938_add_index_to_poll_answer.rb
index 2360bc485..0969e2784 100644
--- a/db/migrate/20191203124938_add_index_to_poll_answer.rb
+++ b/db/migrate/20191203124938_add_index_to_poll_answer.rb
@@ -1,17 +1,17 @@
 class AddIndexToPollAnswer < ActiveRecord::Migration[5.2]
   def change
-    # remove_index :poll_votes, :poll_question_id
-    # remove_index :poll_votes, :user_id
-    # remove_index :poll_votes, :poll_answer_id
-    #
-    # change_column_default :poll_votes, :poll_question_id, from: nil, to: -1
-    # PollVote.where(poll_answer_id: nil).update_all(poll_answer_id: -1)
-    #
-    # sql = %Q(delete from poll_votes where (poll_question_id, user_id, poll_answer_id) in
-    #         (select * from (select poll_question_id, user_id, poll_answer_id from poll_votes group by poll_question_id, user_id, poll_answer_id having count(*) > 1) a)
-    #         and id not in (select * from (select min(id) from poll_votes group by poll_question_id, user_id, poll_answer_id having count(*) > 1 order by id) b))
-    # ActiveRecord::Base.connection.execute sql
-    #
-    # add_index :poll_votes, [:poll_question_id, :user_id, :poll_answer_id], name: 'poll_answer_index', unique: true
+    remove_index :poll_votes, :poll_question_id
+    remove_index :poll_votes, :user_id
+    remove_index :poll_votes, :poll_answer_id
+
+    change_column_default :poll_votes, :poll_question_id, from: nil, to: -1
+    PollVote.where(poll_answer_id: nil).update_all(poll_answer_id: -1)
+
+    sql = %Q(delete from poll_votes where (poll_question_id, user_id, poll_answer_id) in
+            (select * from (select poll_question_id, user_id, poll_answer_id from poll_votes group by poll_question_id, user_id, poll_answer_id having count(*) > 1) a)
+            and id not in (select * from (select min(id) from poll_votes group by poll_question_id, user_id, poll_answer_id having count(*) > 1 order by id) b))
+    ActiveRecord::Base.connection.execute sql
+
+    add_index :poll_votes, [:poll_question_id, :user_id, :poll_answer_id], name: 'poll_answer_index', unique: true
   end
 end