1 files changed, 31 insertions, 0 deletions
diff --git a/db/post_migrate/20200615111857_unconfirm_wrongfully_verified_emails.rb b/db/post_migrate/20200615111857_unconfirm_wrongfully_verified_emails.rb
new file mode 100644
index 00000000000..41280872a94
--- /dev/null
+++ b/db/post_migrate/20200615111857_unconfirm_wrongfully_verified_emails.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class UnconfirmWrongfullyVerifiedEmails < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  INTERVAL = 5.minutes.to_i
+  BATCH_SIZE = 500
+  MIGRATION = 'WrongfullyConfirmedEmailUnconfirmer'
+  EMAIL_INDEX_NAME = 'tmp_index_for_email_unconfirmation_migration'
+
+  class Email < ActiveRecord::Base
+    include EachBatch
+  end
+
+  def up
+    add_concurrent_index :emails, :id, where: 'confirmed_at IS NOT NULL', name: EMAIL_INDEX_NAME
+
+    queue_background_migration_jobs_by_range_at_intervals(Email,
+                                                          MIGRATION,
+                                                          INTERVAL,
+                                                          batch_size: BATCH_SIZE)
+  end
+
+  def down
+    remove_concurrent_index_by_name(:emails, EMAIL_INDEX_NAME)
+  end
+end