message: Handle undefined values
diff: /** Transform a database string into a JS bigint and vice versa. */
  export const bigint_transformer = {
  - from: (value: string): bigint => {
  + from: (value?: string): bigint | undefined => {
  + if (!value) return undefined;
  return BigInt(value);
  },
  - to: (value: bigint): string => {
  - return value.toString();
  + to: (value?: bigint): string | undefined => {
  + return value?.toString();
  }
  }
  