WordPress。电子商务。添加到购物车之前的操作挂钩
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Wordpress. Woocommerce. Action hook BEFORE adding to cart
提问by Sergiu-Antonin Ghita
What i need to do:I want to run some checks on a product before being added to the cart. More exactly:I want to compare the product i am about to add to the cart, with the ones already added, to see if there are some conflicts. An example:Let's say we have a product named "Both shoes", and a product "left shoe". A user adds "left shoe" to the cart. Then he adds "both shoes". I want to print an error instead of adding the "both shoes": Sorry, but you can't add both shoes if you've added left shoe to the cart. If you want to buy "both shoes", please first remove "left shoe".
我需要做什么：我想在将产品添加到购物车之前对产品进行一些检查。 更准确地说：我想比较我即将添加到购物车的产品和已经添加的产品，看看是否存在一些冲突。 一个例子：假设我们有一个名为“Both shoes”的产品和一个名为“left shoes”的产品。用户将“左鞋”添加到购物车。然后他添加了“双鞋”。我想打印错误而不是添加“双鞋”：抱歉，如果您将左鞋添加到购物车，则无法添加双鞋。如果您想购买“双鞋”，请先将“左鞋”取下。
I've looked at class-wc-cart.php and i found an action hook at line 811, but it's too late! It's after the product has been added
我查看了 class-wc-cart.php 并在第811行找到了一个动作挂钩，但为时已晚！这是在添加产品之后
"do_action( 'woocommerce_add_to_cart', $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data );"
"do_action('woocommerce_add_to_cart', $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data );"
The add_to_cart method starts at line 705. http://wcdocs.woothemes.com/apidocs/source-class-WC_Cart.html#705
add_to_cart 方法从第705行开始。 http://wcdocs.woothemes.com/apidocs/source-class-WC_Cart.html#705
How can my "product conflict manager" function be hooked before line 801, without hacking woocommerce?
我的“产品冲突管理器”功能怎么能在801线之前被勾住，又不会黑掉woocommerce？
Thank you!
谢谢！
回答by helgatheviking
A bit late, but I think you are looking for add to cart validation, which is filterable. Here's an over simplified version:
有点晚了，但我认为您正在寻找可过滤的添加到购物车验证。这是一个过度简化的版本：
function so_validate_add_cart_item( $passed, $product_id, $quantity, $variation_id = '', $variations= '' ) {
// do your validation, if not met switch $passed to false
if ( 1 != 2 ){
$passed = false;
wc_add_notice( __( 'You can not do that', 'textdomain' ), 'error' );
}
return $passed;
}
add_filter( 'woocommerce_add_to_cart_validation', 'so_validate_add_cart_item', 10, 5 );
