查詢WordPress的縮略圖

我想在wordpress博客中發佈帖子的縮略圖元數據以及他們的類別和一些其他數據。縮略圖數據將被序列化，稍後我將對其進行反序列化。查詢WordPress的縮略圖

下面是該查詢我：

SELECT wpostmeta.meta_value AS url, 
    wposts.post_content, wposts.post_title, wposts.post_status, wposts.post_name, 
    cat_terms.name AS category_name, cat_terms.term_id AS category_id, 
    ttable.meta_value AS thumb_data 
    FROM `wp_postmeta` AS wpostmeta, 
    `wp_posts` AS wposts 
    INNER JOIN wp_term_relationships AS cat_term_relationships ON (wposts.ID = cat_term_relationships.object_id) 
    INNER JOIN wp_term_taxonomy AS cat_term_taxonomy ON (cat_term_relationships.term_taxonomy_id = cat_term_taxonomy.term_taxonomy_id AND cat_term_taxonomy.taxonomy = 'category') 
    INNER JOIN wp_terms AS cat_terms ON (cat_term_taxonomy.term_id = cat_terms.term_id) 
    LEFT JOIN `wp_postmeta` AS ttable ON (wposts.ID = ttable.post_id AND ttable.meta_key = '_wp_attachment_metadata') 
    WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_key = 'url' 
    AND wposts.post_type = 'post'

一切正常，除了附件部分。 'thumb_data'是NULL。

你能幫我解決這個問題嗎？

來源

2010-08-31 reggie

這個查詢解決我的問題：

$sql = "SELECT wposts.ID AS ID, thumbposts.ID AS thumbposts_ID, 
     postmeta.meta_value AS url, 
     wposts.post_content, wposts.post_title, wposts.post_status, wposts.post_name, 
     cat_terms.name AS category_name, cat_terms.term_id AS category_id, 
     thumb.meta_value AS thumb_data 

     FROM `wp_postmeta` AS postmeta, 
     `wp_posts` AS thumbposts, 
     `wp_postmeta` AS thumb, 
     `wp_posts` AS wposts 

     INNER JOIN wp_term_relationships AS cat_term_relationships ON (wposts.ID = cat_term_relationships.object_id) 
     INNER JOIN wp_term_taxonomy AS cat_term_taxonomy ON (cat_term_relationships.term_taxonomy_id = cat_term_taxonomy.term_taxonomy_id AND cat_term_taxonomy.taxonomy = 'category') 
     INNER JOIN wp_terms AS cat_terms ON (cat_term_taxonomy.term_id = cat_terms.term_id) 

     WHERE wposts.ID = postmeta.post_id 
     AND postmeta.meta_key = 'url' 

     AND thumbposts.post_parent = wposts.ID 
     AND thumbposts.post_type = 'attachment' 

     AND thumb.post_id = thumbposts.ID 
     AND thumb.meta_key = '_wp_attachment_metadata' 

     AND wposts.post_type = 'post'"; 

    if($filter == 1){ 
     $sql .= " AND cat_terms.term_id = '1'"; 
    } 
    if($filter == 2){ 
     $sql .= " AND cat_terms.term_id = '3'"; 
    } 

    $sql .= " GROUP BY wposts.ID 
     ORDER BY wposts.post_date ASC";

來源

2010-09-08 16:02:22 reggie

您能否準確解釋您正在努力達到的目標 - 在大量情況下，並不需要直接訪問數據庫。

例如，您可以使用get_posts'post_type'=>'attachment'和'post_mime_type'=>'image'來獲取圖像附件，然後輸出元數據，並且內置許多功能來處理調整大小，顯示和裁剪縮略圖，如get_post_thumbnail（）等

來源

2010-08-31 22:53:18 Chris

查詢WordPress的縮略圖

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