按属性值减少和检查可变产品的库存

Question

使用this code 按属性值减少库存中的库存。它可以减少库存，但是当您有 100 克库存并且客户购买 120 克时。它不会显示缺货。

于是创建了以下代码：

<?php

add_filter( 'woocommerce_order_item_quantity', 'filter_order_item_quantity', 10, 3 ); 
function filter_order_item_quantity( $quantity, $order, $item )  
{
    $product   = $item->get_product();
    $stock_quantity = $product->get_stock_quantity();
    $term_name = $product->get_attribute('pa_weight');

    // The 'pa_size' attribute value is "15 grams" And we keep only the numbers
    $quantity_grams = preg_replace('/[^0-9.]+/', '', $term_name);

    // Calculated new quantity
    if( is_numeric ( $quantity_grams ) && $quantity_grams != 0 )
        $quantity *= $quantity_grams;

    if($quantity > $stock_quantity) {
        return $quantity;
    } else {
        echo '<p>Out of Stock</p>';
    } 

}

但是，它不起作用...

有没有办法从 $quantity 查询库存？

    if($quantity > $stock_quantity) {
        return $quantity;
    } else {
        echo '<p>Out of Stock</p>';
    } 

编辑：

试图用钩子将库存减少到wc_reduce_stock_levels，但没有成功

add_filter( 'wc_reduce_stock_levels', 'filter_reduce_stock_levels', 5, 1); 
function filter_reduce_stock_levels( $order_id ) { 
    if ( is_a( $order_id, 'WC_Order' ) ) { 
        $order = $order_id; 
        $order_id = $order->get_id(); 
    } else { 
        $order = wc_get_order( $order_id ); 
    } 
    if ( 'yes' === get_option( 'woocommerce_manage_stock' ) && $order && apply_filters( 'woocommerce_can_reduce_order_stock', true, $order ) && sizeof( $order->get_items() ) > 0 ) { 
        foreach ( $order->get_items() as $item ) { 
            if ( $item->is_type( 'line_item' ) && ( $product = $item->get_product() ) && $product->managing_stock() ) { 
                $term_name = $product->get_attribute('pa_weight');
                $qty = apply_filters( 'woocommerce_order_item_quantity', $item->get_quantity(), $order, $item ); 
                $item_name = $product->get_formatted_name(); 
                $new_stock = wc_update_product_stock( $product, $qty, 'decrease' ); 
                $quantity_grams = preg_replace('/[^0-9.]+/', '', $term_name);
                $qty *= $quantity_grams;
                if ( ! is_wp_error( $new_stock ) ) { 
                    /** translators: 1: item name 2: old stock quantity 3: new stock quantity */ 
                    $order->add_order_note( sprintf( __( '%1$s stock reduced from %2$s to %3$s.', 'woocommerce' ), $item_name, $new_stock + $qty, $new_stock ) ); 

                    // Get the latest product data. 
                    $product = wc_get_product( $product->get_id() ); 

                    if ( '' !== get_option( 'woocommerce_notify_no_stock_amount' ) && $new_stock <= get_option( 'woocommerce_notify_no_stock_amount' ) ) { 
                        do_action( 'woocommerce_no_stock', $product ); 
                    } elseif ( '' !== get_option( 'woocommerce_notify_low_stock_amount' ) && $new_stock <= get_option( 'woocommerce_notify_low_stock_amount' ) ) { 
                        do_action( 'woocommerce_low_stock', $product ); 
                    } 

                    if ( $new_stock < 0 ) { 
                        do_action( 'woocommerce_product_on_backorder', array( 'product' => $product, 'order_id' => $order_id, 'quantity' => $qty ) ); 
                    } 
                } 
            } 
        } 

        // ensure stock is marked as "reduced" in case payment complete or other stock actions are called 
        $order->get_data_store()->set_stock_reduced( $order_id, true ); 

        do_action( 'woocommerce_reduce_order_stock', $order ); 
    } 
} 

Answer 1

删除所有旧代码并将它们添加到主题的“functions.php”中。

// reduce stock based on 'pa_weight' attribute
add_filter( 'woocommerce_order_item_quantity', 'filter_order_item_quantity', 10, 3 ); 
function filter_order_item_quantity( $quantity, $order, $item )  
{
    $product   = $item->get_product();
    $term_name = $product->get_attribute('pa_weight');

    // 'pa_weight' attribute value is "15 grams" - keep only the numbers
    $quantity_grams = preg_replace('/[^0-9.]+/', '', $term_name);

    // new quantity
    if( is_numeric ( $quantity_grams ) && $quantity_grams != 0 )
        $quantity *= $quantity_grams;

    return $quantity;
}

// check out of stock using 'pa_weight' attribute
add_filter( 'woocommerce_add_to_cart_validation', 'woocommerce_validate_attribute_weight' );
function woocommerce_validate_attribute_weight() 
{
    // get product id
    if (isset($_REQUEST["add-to-cart"])) {
        $productid = (int)$_REQUEST["add-to-cart"];
    } else {
        $productid = null;
    }

    // get quantity
    if (isset($_REQUEST["quantity"])) {
        $quantity = (int)$_REQUEST["quantity"];
    } else {
        $quantity = 1;
    }

    // get weight of selected attribute
    if (isset($_REQUEST["attribute_pa_weight"])) {
        $weight = preg_replace('/[^0-9.]+/', '', $_REQUEST["attribute_pa_weight"]);
    } else {
        $weight = null;
    }

    // comparing stock
    if($productid && $weight)
    {
        $product = wc_get_product($productid);
        $productstock = (int)$product->get_stock_quantity();

        if(($weight * $quantity) > $productstock)
        {
            wc_add_notice( sprintf( 'You cannot add that amount of "%1$s" to the cart because there is not enough stock (%2$s remaining).', $product->get_title(), $productstock ), 'error' );
            return;
        }
    }

    return true;
}

第一个功能与您的几乎相同，您无法使用woocommerce_order_item_quantity 显示缺货消息，因为它只会在订单确认成功后执行。

您需要在将产品添加到购物车时验证新库存，这可以通过使用第二个功能（使用woocommerce_add_to_cart_validation）来实现。

Answer 2

我从未使用过 woo commerce，但我看到您正在尝试从例如15 grams。我不确定，但很可能你也应该为$stock_quantity 做同样的事情。最终的代码应该是这样的。而且我还注意到，您正在检查是否要求的数量大于库存数量，然后将其退回，这是不合逻辑的。应该是对的。我的意思是要求的数量应该小于或等于库存数量。

<?php

add_filter( 'woocommerce_order_item_quantity', 'filter_order_item_quantity', 10, 3 ); 
function filter_order_item_quantity( $quantity, $order, $item )  
{
    $product   = $item->get_product();
    $stock_quantity = $product->get_stock_quantity();
    $term_name = $product->get_attribute('pa_weight');

    // The 'pa_size' attribute value is "15 grams" And we keep only the numbers
    $quantity_grams = preg_replace('/[^0-9.]+/', '', $term_name);
    $stock_quantity = (int)preg_replace('/[^0-9.]+/', '', $stock_quantity);

    // Calculated new quantity
    if( is_numeric ( $quantity_grams ) && $quantity_grams != 0 )
        $quantity *= $quantity_grams;

    if($quantity <= $stock_quantity) {
        return $quantity;
    } else {
        return '<p>Out of Stock</p>';
    } 
}