Method mergeOrderBy

packages/core/src/utils/QueryHelper.ts:599–621

* Merges multiple orderBy sources with key-level deduplication (first-seen key wins). * RawQueryFragment symbol keys are never deduped (each is unique).

(...sources: (QueryOrderMap<T> | QueryOrderMap<T>[] | undefined)[])

   * RawQueryFragment symbol keys are never deduped (each is unique).
   */
  static mergeOrderBy<T>(...sources: (QueryOrderMap<T> | QueryOrderMap<T>[] | undefined)[]): QueryOrderMap<T>[] {
    const result: QueryOrderMap<T>[] = [];
    const seenKeys = new Set<string>();

    for (const source of sources) {
      if (source == null) {
        continue;
      }

      for (const item of Utils.asArray(source)) {
        for (const key of Utils.getObjectQueryKeys(item)) {
          if (typeof key === 'symbol') {
            result.push({ [key]: item[key as EntityKey] } as QueryOrderMap<T>);
          } else if (!seenKeys.has(key)) {
            seenKeys.add(key);
            result.push({ [key]: item[key] } as QueryOrderMap<T>);
          }
        }
      }
    }

    return result;
  }
}

interface ProcessWhereOptions<T> {