Method getDetail

src/lib/errors.ts:185–194

* Type-safe accessor for a single key inside `details`. Avoids the * `(err.details as { foo?: unknown })?.foo` cast pattern that every * 412 / CONFLICT handler had to repeat. * * @param key The key to read from `details`. * @param validator Optional type-guard. When provided, retu

(key: string, validator?: (v: unknown) => v is T)

   *   );
   */
  getDetail<T = unknown>(key: string, validator?: (v: unknown) => v is T): T | undefined {
    const details = this.details;
    if (details === undefined || details === null || typeof details !== 'object') {
      return undefined;
    }
    const value = (details as Record<string, unknown>)[key];
    if (value === undefined) return undefined;
    if (validator && !validator(value)) return undefined;
    return value as T;
  }

  /**
   * Local fabrication of a missing-key error. Wording matches the server