1 files changed, 26 insertions, 0 deletions
diff --git a/db/post_migrate/20210403022952_remove_notes_delete_cascade_timelogs.rb b/db/post_migrate/20210403022952_remove_notes_delete_cascade_timelogs.rb
new file mode 100644
index 00000000000..832ba584931
--- /dev/null
+++ b/db/post_migrate/20210403022952_remove_notes_delete_cascade_timelogs.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+class RemoveNotesDeleteCascadeTimelogs < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  CONSTRAINT_NAME = 'fk_timelogs_note_id'
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_foreign_key :timelogs, :notes, column: :note_id, on_delete: :nullify, name: CONSTRAINT_NAME
+
+    with_lock_retries do
+      remove_foreign_key_if_exists :timelogs, :notes, column: :note_id, on_delete: :cascade
+    end
+  end
+
+  def down
+    add_concurrent_foreign_key :timelogs, :notes, column: :note_id, on_delete: :cascade
+
+    with_lock_retries do
+      remove_foreign_key_if_exists :timelogs, :notes, column: :note_id, on_delete: :nullify, name: CONSTRAINT_NAME
+    end
+  end
+end