Product ID changes if variable BOM raw material out of stock

DisruptDevelopers

On a variable product with inventory controlled by a raw material, if the raw material is out of stock, the product id changes to the variable BOM product id. If the product is in stock, the product id remains the actual product id.

How can I get the actual product id on an out of stock variation controlled by a raw material?

CODE:

function dynamic_backorders_by_tag( $backorder_status, $product ) {

// Define the tag(s) that should trigger backorders
$target_tags = array( 'preorder', 'pre-order', 'allow-backorder' );

// Get the product ID (handling variations by checking the parent)
$product_id = $product->get_id();
if ( $product->is_type( 'variation' ) ) {
    $product_id = $product->get_parent_id();
}
    
// Check if the product has any of the target tags

// NOT WORKING FOR QUANTITY = 0
/*
Only when variation quantity 0, the product id becomes the BOM variation instead of the acutal product.
*/

if ( has_term( $target_tags, 'product_tag', $product_id ) ) {
    // Options: 'yes' (Allow), 'notify' (Allow but notify), 'no' (Do not allow)
    echo('in stock variable parent $product_id: ' . $product->get_parent_id() . '<br/>'); // works!
    return 'notify'; 
} else {
    echo('out of stock variable parent $product_id: ' . $product->get_parent_id() . '<br/>'); // product id is BOM product instead of actual product
    echo 'Atum BOM Product<br/>';
    print_r($product);
}

return $backorder_status;

}
add_filter( 'woocommerce_product_get_backorders', 'dynamic_backorders_by_tag', 10, 2 );
add_filter( 'woocommerce_product_variation_get_backorders', 'dynamic_backorders_by_tag', 10, 2 );`

Salva

Hi DisruptDevelopers

I'm sorry, but custom coding is out of the scope of our support service.

But let me say that your assumption is wrong. The product ID never changes. No matter the stock status.
At least ATUM does not work that way.

Best Regards,
Salva.

DisruptDevelopers

In simple terms, if the raw material is in stock (thus making the product in stock), then the product in filter woocommerce_product_variation_get_backorders is the correct product number (in my case 8567).

But if the raw material is out of stock (thus making the product out of stock), then the product in filter woocommerce_product_variation_get_backorders is the BOM raw material product number (in my case 4240).

But forget the custom code. Perhaps we can fix this on the back-end UI...

On the backend, if I go into the variation for product 8567, allow backorders is greyed out because it's controlled by the raw material.

If I go into the raw material variation for product 4240, I can set Allow Backorders, which will then update product 8567 also.

What I'm wanting is to allow backorders on product 8567, but not allow backorders on raw material 4240. How can I do that? I've figured out how to do it with code on in-stock variations, but because of the issue above, I cannot do it with code on out-of-stock variations.

Salva

Hi DisruptDevelopers

That's not possible.
By design, if you want to use backorders on any product with linked BOMs, you must set the "allow backorders" on all the BOMs belonging to the BOM tree of that product when the BOM stock control is enabled.
Changing this can cause issues with your stock.

And makes no sense to me what you are trying to achieve. If you allow backorders on the parent product but not on the BOM product, it is technically the same as not allowing backorders on any of them. Because when the BOM stock control is enabled, the parent product's stock will be "calculated," and when the BOM's stock is depleted, the calculated stock will become 0, and the product will be set as out-of-stock immediately, so the BOM should never go to minus.

DisruptDevelopers

We have a 2 week wait time to get products from our manufacturer. On regular orders (buying the BOM product directly), we do not want customers to wait and we do not want to allow backorders. But on custom products (which use BOM raw materials), we're fine with backorders because customers already expect the custom product to take time to make. So customers are fine waiting 2 weeks for the BOM raw material to come in from the manufacturer and then another week for customization. That's why we want to be able to offer backorders on custom products (that use BOM raw materials), but not on the standard BOM products.

Salva

DisruptDevelopers

Then you can achieve that by do not selling the BOM product directly. If you use the BOM product only for manufacturing, and you create simple or variable products, the "regular orders" products and your "custom products" can both share the same raw material, and you can decide whether to allow backorders on any of them (no matter whether the raw material has backorders enabled).

I hope this helps.