try:
    db = DBPools()
    media_type = params_kw.get('media_type', '')
    page = int(params_kw.get('page', 1))
    page_size = int(params_kw.get('page_size', 20))
    offset = (page - 1) * page_size

    where = "WHERE status = '1'"
    bindparams = {}
    if media_type:
        where += " AND media_type = ${media_type}$"
        bindparams['media_type'] = media_type

    async with db.sqlorContext('sage') as sor:
        total_r = await sor.sqlExe(
            f"SELECT COUNT(*) as cnt FROM showcase_posts {where}", bindparams
        )
        total = total_r[0]['cnt'] if total_r else 0

        posts = await sor.sqlExe(
            f"""SELECT id, author_id, author_name, title, description, media_type,
                    content_url, thumbnail_url, duration, tags, category,
                    like_count, comment_count, view_count, download_count,
                    is_featured, price, created_at
                FROM showcase_posts {where}
                ORDER BY created_at DESC
                LIMIT {page_size} OFFSET {offset}""",
            bindparams
        )
    return json.dumps({
        "status": "ok", "data": list(posts),
        "total": total, "page": page, "page_size": page_size
    }, ensure_ascii=False)
except Exception as e:
    return json.dumps({"status": "error", "data": [], "message": str(e)}, ensure_ascii=False)