1 files changed, 23 insertions, 0 deletions
diff --git a/db/post_migrate/20220112090556_remove_cascade_delete_from_project_namespace_foreign_key.rb b/db/post_migrate/20220112090556_remove_cascade_delete_from_project_namespace_foreign_key.rb
new file mode 100644
index 00000000000..d786c9d846a
--- /dev/null
+++ b/db/post_migrate/20220112090556_remove_cascade_delete_from_project_namespace_foreign_key.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class RemoveCascadeDeleteFromProjectNamespaceForeignKey < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  TARGET_COLUMN = :project_namespace_id
+
+  def up
+    with_lock_retries do
+      remove_foreign_key_if_exists(:projects, column: TARGET_COLUMN)
+    end
+
+    add_concurrent_foreign_key(:projects, :namespaces, column: TARGET_COLUMN, on_delete: :nullify)
+  end
+
+  def down
+    with_lock_retries do
+      remove_foreign_key_if_exists(:projects, column: TARGET_COLUMN)
+    end
+
+    add_concurrent_foreign_key(:projects, :namespaces, column: TARGET_COLUMN, on_delete: :cascade)
+  end
+end