1 files changed, 28 insertions, 0 deletions
diff --git a/db/post_migrate/20200710102418_delete_user_callout_alerts_moved.rb b/db/post_migrate/20200710102418_delete_user_callout_alerts_moved.rb
new file mode 100644
index 00000000000..e14cd7ac3ee
--- /dev/null
+++ b/db/post_migrate/20200710102418_delete_user_callout_alerts_moved.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class DeleteUserCalloutAlertsMoved < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  class UserCallout < ActiveRecord::Base
+    include EachBatch
+
+    self.table_name = 'user_callouts'
+  end
+
+  BATCH_SIZE = 1_000
+
+  # Inlined from UserCalloutEnums.feature_names
+  FEATURE_NAME_ALERTS_MOVED = 20
+
+  def up
+    UserCallout.each_batch(of: BATCH_SIZE, column: :user_id) do |callout|
+      callout.where(feature_name: FEATURE_NAME_ALERTS_MOVED).delete_all
+    end
+  end
+
+  def down
+    # no-op
+  end
+end