A have a ton of variable products. I'm using cron to run the script every X minutes for fetching stock level from an external source. If I use wc_get_product_id_by_sku
and update_post_meta
it takes too long so I'm trying to find the way to use a custom prepared query. If I know product_id
query would be like that:
$conn->prepare( "UPDATE wp_postmeta SET meta_value=? WHERE post_id=? AND meta_key=`_stock`" );
But I only know a product SKU. So how to modify this query to update _stock
based on a product SKU?
post_id | meta_key | meta_value |
---|---|---|
10 | _sku | ABCD |
10 | _stock | 25 |
You can use the following SQL query embedded in a function that will update product stock quantity based on the product SKU (the table wp_wc_product_meta_lookup
needs also to be updated) :
/*
* Update stock quatity from a product sku
*
* @param int $stock_qty The new stock quatity
* @param int $sku The product sku
* @return int/null
*/
function update_stock_qty_from_product_sku( $stock_qty, $sku ) {
global $wpdb;
return $wpdb->query( $wpdb->prepare( "
UPDATE {$wpdb->prefix}postmeta pm1
INNER JOIN {$wpdb->prefix}postmeta pm2
ON pm1.post_id = pm2.post_id
INNER JOIN {$wpdb->prefix}wc_product_meta_lookup pml
ON pm1.post_id = pml.product_id
SET pm1.meta_value = %d, pml.stock_quantity = %d
WHERE pm1.meta_key = '_stock'
AND pm2.meta_key = '_sku'
AND pm2.meta_value = '%s'
", $stock_qty, $stock_qty, $sku ) );
}
Code goes in functions.php file of the active child theme (or active theme). Tested and works.
Related: How can I do an UPDATE statement with JOIN in SQL Server?
You need first post id then you can update stock value. First get the post id by sku
global $wpdb;
$productId = $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key='_sku' AND meta_value='%s' LIMIT 1", $sku ) );
we will get product id then just guess $productValue = 50; then
if ( $product_id )
{
$wpdb->prepare( "UPDATE wp_postmeta SET meta_value=".$productValue." WHERE post_id=".$productId." AND meta_key=`_stock`" );
}
dear try this code it will work
$wpdb
and JOIN
works too slow, so the fastest way is to use four separate prepared queries:
$conn = mysqli_init();
mysqli_real_connect( $conn, DB_HOST, DB_USER, DB_PASSWORD, DB_NAME );
// Get product ID by SKU
$stmt1 = $conn->prepare( "SELECT post_id FROM {$wpdb->prefix}postmeta WHERE meta_key = '_sku' AND meta_value = ?");
// Update stock level on postmeta table
$stmt2 = $conn->prepare( "UPDATE {$wpdb->prefix}postmeta SET meta_value = ? WHERE meta_key = '_stock' AND post_id = ?");
// Update stock data on wc_product_meta_lookup table
$stmt3 = $conn->prepare( "UPDATE {$wpdb->prefix}wc_product_meta_lookup SET stock_quantity = ?, stock_status = ? WHERE product_id = ?");
// Update stock status on postmeta table
$stmt4 = $conn->prepare( "UPDATE {$wpdb->prefix}postmeta SET meta_value = ? WHERE meta_key = '_stock_status' AND post_id = ?");
foreach ( $products as $product ) {
$qty = $product['ON_HAND'];
$sku = $product['PRODUCT_SKU'];
$status = $qty ? 'instock' : 'onbackorder';
// Get product ID by SKU
$stmt1->bind_param( "s", $sku );
$stmt1->execute();
$res = $stmt1->get_result();
while ( $row = $res->fetch_assoc() ) {
$id = $row['post_id'];
// Update stock level on postmeta table
$stmt2->bind_param( "dd", $qty, $id );
$stmt2->execute();
// Update stock data on wc_product_meta_lookup table
$stmt3->bind_param( "dsd", $qty, $status, $id );
$stmt3->execute();
// Update stock status on postmeta table
$stmt4->bind_param( "sd", $status, $id );
$stmt4->execute();
}
}
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