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Problem with product stock management when quantity by default is 0

This topic has 2 replies, 2 voices, and was last updated 2 months ago ago by Luca Rossi

diatomee

Participant

September 29, 2025 at 09:09

Hi,

I have added a variable product in my shop.
some variations of this product has 1 quantity in stock and some has the quantity 0 in stock
( I checked the box “manage quantity” for each variations )
(I want to show the product even if not possible to order for the moment) (and I specified that out of stock orders were not possible)

When I go to the website :
– For the variations with quantity = 1 , you can’t increase the desired quantity above 1, and you can add to cart : it’s ok
– But for the variation that has 0 as quantity in stock by default, the customer can increase the desired quantity (3, 4 , 5, ….) . Even if “add to cart” button is not clickable. I don’t want customer to be able to increase the quantity if my stock is 0.

How can I do that ?

thanks

#456139 Copied

1 Answer

Luca Rossi

Support staff

October 1, 2025 at 11:24

Dear @diatomee,

Please try adding the following code under functions.php file locates in your child theme:


/**
 * Disable quantity input for out of stock variations
 */
function disable_qty_for_out_of_stock_variations() {
    // Only load on single product pages
    if (!is_product()) {
        return;
    }
    ?>
    <script type="text/javascript">
        jQuery(document).ready(function($) {
            // Function to check and disable quantity input
            function checkVariationStock() {
                var $form = $('form.variations_form');
                var $qtyWrapper = $form.find('.quantity');
                var $qtyInput = $form.find('input.qty');
                var $addToCartButton = $form.find('button.single_add_to_cart_button');

                // Get the current variation data
                var variation = $form.data('product_variations');
                var selectedAttributes = {};

                // Get all selected attributes
                $form.find('select[name^="attribute_"]').each(function() {
                    var attrName = $(this).attr('name');
                    var attrValue = $(this).val();
                    if (attrValue) {
                        selectedAttributes[attrName] = attrValue;
                    }
                });

                // Find matching variation
                var matchedVariation = null;
                if (variation) {
                    for (var i = 0; i < variation.length; i++) {
                        var match = true;
                        for (var attr in selectedAttributes) {
                            if (variation[i].attributes[attr] !== selectedAttributes[attr] &&
                                variation[i].attributes[attr] !== '') {
                                match = false;
                                break;
                            }
                        }
                        if (match) {
                            matchedVariation = variation[i];
                            break;
                        }
                    }
                }

                // Check if variation is in stock
                if (matchedVariation && !matchedVariation.is_in_stock) {
                    $qtyInput.prop('disabled', true).css('opacity', '0.5');
                    $addToCartButton.prop('disabled', true);
                    $qtyWrapper.hide();
                } else if (matchedVariation && matchedVariation.is_in_stock) {
                    $qtyInput.prop('disabled', false).css('opacity', '1');
                    $addToCartButton.prop('disabled', false);
                    $qtyWrapper.show();
                }
            }

            // Listen for variation changes
            $('form.variations_form').on('change', 'select[name^="attribute_"]', function() {
                checkVariationStock();
            });

            // Listen for WooCommerce variation events
            $('form.variations_form').on('found_variation', function(event, variation) {
                var $qtyInput = $(this).find('input.qty');
                var $qtyWrapper = $(this).find('.quantity');

                if (!variation.is_in_stock) {
                    $qtyInput.prop('disabled', true).css('opacity', '0.5');
                    $qtyWrapper.hide();
                } else {
                    $qtyInput.prop('disabled', false).css('opacity', '1');
                    $qtyWrapper.show();
                }
            });

            // Reset when variation is cleared
            $('form.variations_form').on('reset_data', function() {
                var $qtyInput = $(this).find('input.qty');
                $qtyInput.prop('disabled', false).css('opacity', '1');
            });

            // Check on page load if variation is already selected
            checkVariationStock();
        });
    </script>
    <?php
}
add_action('wp_footer', 'disable_qty_for_out_of_stock_variations');

The code above will disable the quantity if a selected variation is out of stock.

Best Regards,
8Theme’s Team

#456319 Copied