Woocommerce REST API add_filter 不起作用

如何解决Woocommerce REST API add_filter 不起作用

我创建了一个 API 来使用 API 添加新的购物车项目数据。我认为过滤器在代码中不起作用。

注册路线：

register_rest_route(
        'ecm-api','/setGiftMessage/',array(
            'methods'  => 'POST','callback' => array($this,'setGiftMessage')
        )
    );

函数定义：

public function setGiftMessage($request){
    global $woocommerce,$sitepress;

    $woocommerce->frontend_includes();
    
    $lang = $request['lang'];
    $user_id = $request['user_id'];
    $product_id = $request['product_id'];       
    $written_message = $request['written_message'];
             

    if(empty($user_id)){
        $response['status'] = 0;
        $response['message'] = __('User id is required',self::domainText);
        $response['data'] = new stdClass();
        return new WP_REST_Response($response,200);
    }

    wp_set_current_user( $user_id );
    
    $woocommerce->session = new WC_Session_Handler();
    $woocommerce->session->init();
    $woocommerce->customer = new WC_Customer( get_current_user_id(),true );
    $woocommerce->cart = new WC_Cart();
    $items = $woocommerce->cart->get_cart();
        
    add_filter( 'woocommerce_add_cart_item_data',function($cart_item_data,$product_id,$variation_id) use($request) {
            
            $cart_item_data['msg_on_gift']='wish you happy birthday';
            return $cart_item_data;
        },10,3 );

    $woocommerce->cart->persistent_cart_update(); 
    
    
        $response['status'] = $cart_item_data;
        $response['message'] = __("Gift Message to saved",self::domainText);
        return new WP_REST_Response($response,200);

    
}

我也尝试将过滤器注册为一个单独的函数：

add_filter('woocommerce_add_cart_item_data',array($this,'add_gift_message_to_cart'),3 );
public function add_gift_message_to_cart($cart_item_data,$variation_id) 
{ 
    $cart_item_data['msg_on_gift']='wish you happy birthday';
    return $cart_item_data;
}