1 files changed, 31 insertions, 0 deletions
diff --git a/db/post_migrate/20201119092319_schedule_repopulate_historical_vulnerability_statistics.rb b/db/post_migrate/20201119092319_schedule_repopulate_historical_vulnerability_statistics.rb
new file mode 100644
index 00000000000..598cc4d93d0
--- /dev/null
+++ b/db/post_migrate/20201119092319_schedule_repopulate_historical_vulnerability_statistics.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class ScheduleRepopulateHistoricalVulnerabilityStatistics < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  BATCH_SIZE = 50
+  DELAY_INTERVAL = 5.minutes
+  MIGRATION_CLASS = 'PopulateVulnerabilityHistoricalStatistics'
+  DAY_COUNT = 365
+
+  disable_ddl_transaction!
+
+  class ProjectSetting < ActiveRecord::Base
+    include EachBatch
+
+    self.table_name = 'project_settings'
+
+    scope :has_vulnerabilities, -> { where('has_vulnerabilities IS TRUE') }
+  end
+
+  def up
+    ProjectSetting.has_vulnerabilities.each_batch(of: BATCH_SIZE) do |batch, index|
+      migrate_in(index * DELAY_INTERVAL, MIGRATION_CLASS, [batch.pluck(:project_id), DAY_COUNT])
+    end
+  end
+
+  def down
+    # no-op
+  end
+end