1 files changed, 30 insertions, 0 deletions
diff --git a/db/post_migrate/20220301093434_backfill_all_project_namespaces.rb b/db/post_migrate/20220301093434_backfill_all_project_namespaces.rb
new file mode 100644
index 00000000000..7071e6241ce
--- /dev/null
+++ b/db/post_migrate/20220301093434_backfill_all_project_namespaces.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class BackfillAllProjectNamespaces < Gitlab::Database::Migration[1.0]
+  MIGRATION = 'ProjectNamespaces::BackfillProjectNamespaces'
+  DELAY_INTERVAL = 2.minutes
+  BATCH_SIZE = 1_000
+  MAX_BATCH_SIZE = 5_000
+  SUB_BATCH_SIZE = 10
+
+  disable_ddl_transaction!
+
+  def up
+    queue_batched_background_migration(
+      MIGRATION,
+      :projects,
+      :id,
+      nil,
+      'up',
+      job_interval: DELAY_INTERVAL,
+      batch_size: BATCH_SIZE,
+      max_batch_size: MAX_BATCH_SIZE,
+      sub_batch_size: SUB_BATCH_SIZE
+    )
+  end
+
+  def down
+    Gitlab::Database::BackgroundMigration::BatchedMigration
+      .for_configuration(MIGRATION, :projects, :id, [nil, 'up']).delete_all
+  end
+end