From 8f70ad805389ef47c4c40ee59d7e5363a7e2cce1 Mon Sep 17 00:00:00 2001
From: cxt <853663049@qq.com>
Date: Wed, 5 Jun 2019 10:54:10 +0800
Subject: [PATCH] =?UTF-8?q?=E9=A2=98=E5=BA=8F=E8=BF=81=E7=A7=BB?=
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---
 ...migration_exercise_bank_question_number.rb | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 db/migrate/20190605021834_migration_exercise_bank_question_number.rb

diff --git a/db/migrate/20190605021834_migration_exercise_bank_question_number.rb b/db/migrate/20190605021834_migration_exercise_bank_question_number.rb
new file mode 100644
index 00000000..fb441763
--- /dev/null
+++ b/db/migrate/20190605021834_migration_exercise_bank_question_number.rb
@@ -0,0 +1,22 @@
+class MigrationExerciseBankQuestionNumber < ActiveRecord::Migration
+  def up
+    Exercise.includes(:exercise_questions).find_each do |exercise|
+      if exercise.exercise_questions.pluck(:question_number).max != exercise.exercise_questions.size
+        exercise.exercise_questions.each_with_index do |question, j|
+          question.update_column('question_number', j + 1)
+        end
+      end
+    end
+
+    ExerciseBank.includes(:exercise_bank_questions).find_each do |exercise|
+      if exercise.exercise_bank_questions.pluck(:question_number).max != exercise.exercise_bank_questions.size
+        exercise.exercise_bank_questions.each_with_index do |question, j|
+          question.update_column('question_number', j + 1)
+        end
+      end
+    end
+  end
+
+  def down
+  end
+end