Disable specific cart item quantity fields based on WooCommerce product category

In woocommerce I am using Hide “remove item” from cart for WooCommerce product category answer code and I would like to disable the cart quantity field too, avoiding customer to change the item quantity to zero.

Is that possible? Any track on this will be appreciated.

Answer

The following code will remove the “quantity field” from cart for items from a specific product category (that you will define in the 2nd function):

// Custom conditional function that handle parent product categories too
function has_product_categories( $categories, $product_id = 0 ) {
    $parent_term_ids = $categories_ids = array(); // Initializing
    $taxonomy        = 'product_cat';
    $product_id      = $product_id == 0 ? get_the_id() : $product_id;

    if( is_string( $categories ) ) {
        $categories = (array) $categories; // Convert string to array
    }

    // Convert categories term names and slugs to categories term ids
    foreach ( $categories as $category ){
        $result = (array) term_exists( $category, $taxonomy );
        if ( ! empty( $result ) ) {
            $categories_ids[] = reset($result);
        }
    }

    // Loop through the current product category terms to get only parent main category term
    foreach( get_the_terms( $product_id, $taxonomy ) as $term ){
        if( $term->parent > 0 ){
            $parent_term_ids[] = $term->parent; // Set the parent product category
            $parent_term_ids[] = $term->term_id; // (and the child)
        } else {
            $parent_term_ids[] = $term->term_id; // It is the Main category term and we set it.
        }
    }
    return array_intersect( $categories_ids, array_unique($parent_term_ids) ) ? true : false;
}

add_filter( 'woocommerce_quantity_input_args', 'hide_cart_quantity_input_field', 20, 2 );
function hide_cart_quantity_input_field( $args, $product ) {
    // HERE your specific products categories
    $categories = array( 'clothing' );

    // Handling product variation
    $product_id = $product->is_type('variation') ? $product->get_parent_id() : $product->get_id();

    // Only on cart page for a specific product category
    if( is_cart() && has_product_categories( $product_id, $categories ) ){
        $input_value = $args['input_value'];
        $args['min_value'] = $args['max_value'] = $input_value;
    }
    return $args;
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.

Note: If you are using also your other answer code, the first function is already defined and doesn”t have to be twice on your function php file…