1 files changed, 27 insertions, 0 deletions
diff --git a/db/post_migrate/20220324081709_fix_and_backfill_project_namespaces_for_projects_with_duplicate_name.rb b/db/post_migrate/20220324081709_fix_and_backfill_project_namespaces_for_projects_with_duplicate_name.rb
new file mode 100644
index 00000000000..f5927a2cc16
--- /dev/null
+++ b/db/post_migrate/20220324081709_fix_and_backfill_project_namespaces_for_projects_with_duplicate_name.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class FixAndBackfillProjectNamespacesForProjectsWithDuplicateName < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  MIGRATION = 'FixDuplicateProjectNameAndPath'
+  DELAY_INTERVAL = 2.minutes
+  BATCH_SIZE = 1000
+
+  class Project < ActiveRecord::Base
+    include ::EachBatch
+
+    self.table_name = 'projects'
+
+    scope :without_project_namespace, -> { where(project_namespace_id: nil) }
+  end
+
+  def up
+    queue_background_migration_jobs_by_range_at_intervals(
+      Project.without_project_namespace, MIGRATION, DELAY_INTERVAL, batch_size: BATCH_SIZE, track_jobs: true
+    )
+  end
+
+  def down
+    # no-op
+  end
+end