Woocommence`update_post_meta`沒有更新數據庫值

Question

我創建了一個插件，它使用update_post_meta函數來更新產品的變化價格。

如果我有一個產品x（id:5）和變化y（id:400）和我運行update_post_meta(400,"_regular_price",13.00);它不更新數據庫。這是非常奇怪的，因爲當我點擊Edit Product（wp-admin）更新後的價格13.00顯示在變體面板中，我必須點擊Update以供客戶查看。這是正常的行爲，如果是的話，update_post_meta函數執行後如何更新數據庫？

(Image) Price after update_post_meta()摘要頁

。

(Image) Price after same update. Edit Product page

這裏是我做批量更新

// $attribute_value/$variation_value are set correctly! 
while ($loop->have_posts()) : $loop->the_post(); 
    global $product; 
    $variations = new WC_Product_Variable($product->post->ID); 
    $variations = $variations->get_available_variations(); 
    foreach ($variations as $key => $variation){ 
     foreach ($variation["attributes"] as $key => $attribute_value): 
      if($attribute_value == $variation_value): 
       update_post_meta($variation['variation_id'], '_regular_price', $regular_price); 
      endif; 
     endforeach; 
    } 
endwhile; 

我也問過同樣的問題代碼，但WordPress的論壇 http://wordpress.org/support/topic/update_post_meta-is-not-updating-the-actual-values?replies=1#post-5742842

Answer 1

在上面的代碼中沒有答覆，$ variation_value變量值，可能不會被分配。因此，如果不滿足條件並且update_post_meta（）未被執行，則存在這種可能性。

我們可以使用下面的代碼代替批量更新。

<?php 

    $get_all_products_query = "SELECT `ID` 
       FROM `". $wpdb->prefix . "posts` 
       WHERE `post_type` LIKE 'product' 
       AND `post_status` = 'publish' 
       ORDER BY `ID` DESC"; 

    $get_all_products_result = $wpdb->get_results($get_all_products_query); 

    $regular_price = ''; 

    if(!empty($get_all_products_result)) 
    { 
    foreach($get_all_products_result as $single_product) 
    { 
     $product_parent_id = $single_product->ID; 

     //Get all variations of single product 

     $query = "SELECT `post_id` 
       FROM `" . $wpdb->prefix . "postmeta` 
       WHERE `meta_key` = 'attribute_pa_product' 
       AND `post_id` 
       IN (
       SELECT `ID` 
       FROM `" . $wpdb->prefix . "posts` 
       WHERE `post_parent` = " . $product_parent_id . " 
      )"; 

     $variation_result = $wpdb->get_results($query); 

     if(!empty($variation_result)) 
     { 
      //As one product may have multiple variation 

      foreach($variation_result as $single_variation) 
      { 
       $post_id = $single_variation->post_id; 

          update_post_meta($post_id, '_regular_price', $regular_price); 
      } 
     } 
    } 
    } 


?> 

爲常規價格變量$ regular_price分配值。

Answer 2

我認爲你們都做得比它需要的複雜得多。

首先，什麼是該檢查的目的：

if($attribute_value == $variation_value) 

的$variation_value變量不縫在所有因此測試不能被設置，update_post_meta()不運行。

我簡化你的代碼到這個（這是測試和工程）：

//Setup WP_Query 
$args = array(
    //Set any arguments you want here to select the products 
    'post_type' => 'product', //Make sure it is the correct post type 
    'post__in' => array(157, 156) //Example post IDs 
); 

$loop = new WP_Query($args); 

//The price to set 
$regular_price = 110; 

//Loop through query results 
while ($loop->have_posts()) 
{ 
    //Setup post data 
    $loop->the_post(); 

    //Instantiate the product class 
    $product = new WC_Product_Variable(get_the_ID()); 

    //Get all variations 
    $variations = $product->get_available_variations(); 

    //Loop though variations and update 
    foreach ($variations as $variation){ 
     update_post_meta($variation['variation_id'], '_regular_price', $regular_price); 
    } 

} 

Answer 3

在woocommerce（2.1.12版本）：

woocommerce /包括/ WC-產品的functions.php： 417

$regular_price = get_post_meta($product_id, '_regular_price', true); 

update_post_meta($product_id, '_price', $regular_price); 
update_post_meta($product_id, '_sale_price', ''); 
update_post_meta($product_id, '_sale_price_dates_from', ''); 
update_post_meta($product_id, '_sale_price_dates_to', ''); 

wc_delete_product_transients($product_id); 

看來你必須更新「_price」元，甚至刪除瞬態來更新產品價格。

要刪除產品短暫的呼叫：

wc_delete_product_transients($product_id);