I'm trying to write a function that should delete Amazon S3 objects within a designated bucket, when I delete a Woocommerce product(s). But I keep getting an fatal error.

Here's how I'm trying to accomplish this:

• The S3 objects (images) are used as Woocommerce downloadable product variations.
• Using Woocommerce's before_delete_post I loop through a products variations and trigger $s3->deleteObject.
• I have a custom field on each variation called s3path. This stores the path of the S3 object eg path/object.jpg.

Here's my function so far. This is saved in functions.php:

function delete_s3_product_images() {
    global $product;
    
    require ABSPATH . 'vendor/autoload.php';
    $s3 = new Aws\S3\S3Client([
        'region'  => 'ap-southeast-2',
        'version' => 'latest',
        'credentials' => [
            'key'    => "--Amazon S3 Key--",
            'secret' => "--Amazon S3 Secret--",
        ]
    ]);
    $variations = $product->get_available_variations();
    foreach ( $variations as $key => $value ) {
        $result = $s3->deleteObject([
            'Bucket' => '--Bucket Name--',
            'Key' => $value['s3path'] //value outputs as "path/object.jpg"
        ]);
    }
}
add_action( 'before_delete_post', 'delete_s3_product_images', 10, 1 );

Here's the error:

Fatal error: Uncaught Error: Call to a member function get_available_variations() on null

I'm assuming it's throwing the error because it thinks the $product is empty. How can I retrieve the $product correctly?

CodePudding user response：

Try the following

function delete_s3_product_images($id){
    $product = wc_get_product($id);

    if(!$product){
        return;
    }

    require ABSPATH ...rest of the function
}

CodePudding user response：

You can create the product object using wc_get_product(). The action [before_delete_post][1] has 2 available parameters: $postid and $post. Use it to create the product object.

function delete_s3_product_images( $postid ) {
    
    $product = wc_get_product( $postid );

    if ( !$product ) { return; }
    
    require ABSPATH . 'vendor/autoload.php';
    $s3 = new Aws\S3\S3Client([
        'region'  => 'ap-southeast-2',
        'version' => 'latest',
        'credentials' => [
            'key'    => "--Amazon S3 Key--",
            'secret' => "--Amazon S3 Secret--",
        ]
    ]);
    $variations = $product->get_available_variations();
    foreach ( $variations as $key => $value ) {
        $result = $s3->deleteObject([
            'Bucket' => '--Bucket Name--',
            'Key' => $value['s3path'] //value outputs as "path/object.jpg"
        ]);
    }
}
add_action( 'before_delete_post', 'delete_s3_product_images', 10, 1 );