'required|integer', 'invoice_id' => 'required|integer', 'parent_id' => 'required|integer', 'school_year' => 'required|string|max_length[9]', 'correction_type' => 'required|max_length[50]', 'approved_refundable_cents' => 'required|integer|greater_than[0]', 'status' => 'required|max_length[30]', ]; }