1 files changed, 37 insertions, 0 deletions
diff --git a/db/post_migrate/20200416111111_migrate_vulnerability_dismissals.rb b/db/post_migrate/20200416111111_migrate_vulnerability_dismissals.rb
new file mode 100644
index 00000000000..6ec8b991968
--- /dev/null
+++ b/db/post_migrate/20200416111111_migrate_vulnerability_dismissals.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+class MigrateVulnerabilityDismissals < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  MIGRATION = 'UpdateVulnerabilitiesToDismissed'.freeze
+  BATCH_SIZE = 500
+  DELAY_INTERVAL = 2.minutes.to_i
+
+  class Vulnerability < ActiveRecord::Base
+    self.table_name = 'vulnerabilities'
+    self.inheritance_column = :_type_disabled
+
+    include ::EachBatch
+  end
+
+  def up
+    return unless Gitlab.ee?
+
+    Vulnerability.select('project_id').group(:project_id).each_batch(of: BATCH_SIZE, column: "project_id") do |project_batch, index|
+      batch_delay = (index - 1) * BATCH_SIZE * DELAY_INTERVAL
+
+      project_batch.each_with_index do |project, project_batch_index|
+        project_delay = project_batch_index * DELAY_INTERVAL
+        migrate_in(batch_delay + project_delay, MIGRATION, project[:project_id])
+      end
+    end
+  end
+
+  def down
+    # nothing to do
+  end
+end