如果在购物车中添加了可变产品并且我想对其进行编辑（我在所有购物车产品中添加了一个编辑按钮）如果仅更改数量，则效果很好，但如果更改了某些归档值，则添加了新产品而不是编辑已添加的产品。这是添加到购物车中的代码 wp-content / plugins / woocommerce / includes / class-wc-cart.php
public function add_to_cart( $product_id = 0, $quantity = 1, $variation_id = 0, $variation = array(), $cart_item_data = array() ) {
try {
$product_id = absint( $product_id );
$variation_id = absint( $variation_id );
// Ensure we don't add a variation to the cart directly by variation ID.
if ( 'product_variation' === get_post_type( $product_id ) ) {
$variation_id = $product_id;
$product_id = wp_get_post_parent_id( $variation_id );
}
$product_data = wc_get_product( $variation_id ? $variation_id : $product_id );
$quantity = apply_filters( 'woocommerce_add_to_cart_quantity', $quantity, $product_id );
if ( $quantity <= 0 || ! $product_data || 'trash' === $product_data->get_status() ) {
return false;
}
// Load cart item data - may be added by other plugins.
$cart_item_data = (array) apply_filters( 'woocommerce_add_cart_item_data', $cart_item_data, $product_id, $variation_id, $quantity );
// Generate a ID based on product ID, variation ID, variation data, and other cart item data.
$cart_id = $this->generate_cart_id( $product_id, $variation_id, $variation, $cart_item_data );
// Find the cart item key in the existing cart.
$cart_item_key = $this->find_product_in_cart( $cart_id );
// Force quantity to 1 if sold individually and check for existing item in cart.
if ( $product_data->is_sold_individually() ) {
$quantity = apply_filters( 'woocommerce_add_to_cart_sold_individually_quantity', 1, $quantity, $product_id, $variation_id, $cart_item_data );
$found_in_cart = apply_filters( 'woocommerce_add_to_cart_sold_individually_found_in_cart', $cart_item_key && $this->cart_contents[ $cart_item_key ]['quantity'] > 0, $product_id, $variation_id, $cart_item_data, $cart_id );
if ( $found_in_cart ) {
/* translators: %s: product name */
throw new Exception( sprintf( '<a href="%s" class="button wc-forward">%s</a> %s', wc_get_cart_url(), __( 'View cart', 'woocommerce' ), sprintf( __( 'You cannot add another "%s" to your cart.', 'woocommerce' ), $product_data->get_name() ) ) );
}
}
if ( ! $product_data->is_purchasable() ) {
throw new Exception( __( 'Sorry, this product cannot be purchased.', 'woocommerce' ) );
}
// Stock check - only check if we're managing stock and backorders are not allowed.
if ( ! $product_data->is_in_stock() ) {
/* translators: %s: product name */
throw new Exception( sprintf( __( 'You cannot add "%s" to the cart because the product is out of stock.', 'woocommerce' ), $product_data->get_name() ) );
}
if ( ! $product_data->has_enough_stock( $quantity ) ) {
/* translators: 1: product name 2: quantity in stock */
throw new Exception( sprintf( __( 'You cannot add that amount of "%1$s" to the cart because there is not enough stock (%2$s remaining).', 'woocommerce' ), $product_data->get_name(), wc_format_stock_quantity_for_display( $product_data->get_stock_quantity(), $product_data ) ) );
}
// Stock check - this time accounting for whats already in-cart.
if ( $product_data->managing_stock() ) {
$products_qty_in_cart = $this->get_cart_item_quantities();
if ( isset( $products_qty_in_cart[ $product_data->get_stock_managed_by_id() ] ) && ! $product_data->has_enough_stock( $products_qty_in_cart[ $product_data->get_stock_managed_by_id() ] + $quantity ) ) {
throw new Exception(
sprintf(
'<a href="%s" class="button wc-forward">%s</a> %s',
wc_get_cart_url(),
__( 'View cart', 'woocommerce' ),
/* translators: 1: quantity in stock 2: current quantity */
sprintf( __( 'You cannot add that amount to the cart — we have %1$s in stock and you already have %2$s in your cart.', 'woocommerce' ), wc_format_stock_quantity_for_display( $product_data->get_stock_quantity(), $product_data ), wc_format_stock_quantity_for_display( $products_qty_in_cart[ $product_data->get_stock_managed_by_id() ], $product_data ) )
)
);
}
}
// If cart_item_key is set, the item is already in the cart.
if ( $cart_item_key ) {
//$new_quantity = $quantity + $this->cart_contents[ $cart_item_key ]['quantity'];
$new_quantity = $quantity;
$this->set_quantity( $cart_item_key, $new_quantity, false );
} else {
$cart_item_key = $cart_id;
// Add item after merging with $cart_item_data - hook to allow plugins to modify cart item.
$this->cart_contents[ $cart_item_key ] = apply_filters(
'woocommerce_add_cart_item',
array_merge(
$cart_item_data,
array(
'key' => $cart_item_key,
'product_id' => $product_id,
'variation_id' => $variation_id,
'variation' => $variation,
'quantity' => $quantity,
'data' => $product_data,
'data_hash' => wc_get_cart_item_data_hash( $product_data ),
)
),
$cart_item_key
);
}
$this->cart_contents = apply_filters( 'woocommerce_cart_contents_changed', $this->cart_contents );
do_action( 'woocommerce_add_to_cart', $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data );
return $cart_item_key;
} catch ( Exception $e ) {
if ( $e->getMessage() ) {
wc_add_notice( $e->getMessage(), 'error' );
}
return false;
}
}