Datafix for CNVS-32686

refs CNVS-32686

Change-Id: Ida8c19678020968b660f48789ce846243d36f4fd
Reviewed-on: https://gerrit.instructure.com/93328
Reviewed-by: James Williams  <jamesw@instructure.com>
Tested-by: Jenkins
QA-Review: Michael Hargiss <mhargiss@instructure.com>
Product-Review: Davis Lynn McClellan <dmcclellan@instructure.com>

db/migrate/20161021180838_fix_double_yamlized_question_data.rb

@@ -0,0 +1,10 @@
+class FixDoubleYamlizedQuestionData < ActiveRecord::Migration
+  tag :postdeploy
+
+  def up
+    DataFixup::FixDoubleYamlizedQuestionData.send_later_if_production(:run)
+  end
+
+  def down
+  end
+end

lib/data_fixup/fix_double_yamlized_question_data.rb

@@ -0,0 +1,11 @@
+module DataFixup::FixDoubleYamlizedQuestionData
+  QUERY = "left(question_data, 11) LIKE '--- |\n  ---'"
+  def self.run
+    AssessmentQuestion.find_ids_in_ranges(:batch_size => 10000) do |min_id, max_id|
+      AssessmentQuestion.where(:id => min_id..max_id).where(QUERY).find_each do |assessment_question|
+        assessment_question.question_data = YAML.load(assessment_question.question_data)
+        assessment_question.save!
+      end
+    end
+  end
+end