仅当强制类别的产品在购物车中时才允许结帐

时间:2016-09-22 16:46:52

标签: php wordpress woocommerce categories cart

如果他们的购物篮中没有特定的产品类别,我想阻止任何客户前往结帐。我还想告诉他们一个错误消息,他们需要添加某个产品。我找到了一些代码,但无法工作。我已经将它作为代码片段添加到我的Wordpress安装中但是它不起作用并且即使我已打开调试也没有错误消息。以下是我在Github中找到的代码,可能需要修改才能使其正常工作:

function sv_wc_prevent_checkout_for_category() {

    // set the slug of the category for which we disallow checkout
    $category = 'sibling';

    // get the product category
    $product_cat = get_term_by( 'slug', $category, 'product_cat' );

    // sanity check to prevent fatals if the term doesn't exist
    if ( is_wp_error( $product_cat ) ) {
        return;
    }

    $category_name = '<a href="' . get_term_link( $category, 'product_cat' ) . '">' . $product_cat->name . '</a>';

    // check if this category is the only thing in the cart
    if ( sv_wc_is_category_alone_in_cart( $category ) ) {

        // render a notice to explain why checkout is blocked
        wc_add_notice( sprintf( 'Hi there! Looks like your cart only contains products from the %1$s category &ndash; you must purchase a product from another category to check out.', $category_name ), 'error' );
    }
}
add_action( 'woocommerce_check_cart_items', 'sv_wc_prevent_checkout_for_category' );

/**
 * Checks if a cart contains exclusively products in a given category
 * 
 * @param string $category the slug of the product category
 * @return bool - true if the cart only contains the given category
 */
function sv_wc_is_category_alone_in_cart( $category ) {

    // check each cart item for our category
    foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {

        // if a product is not in our category, bail out since we know the category is not alone
        if ( ! has_term( $category, 'product_cat', $cart_item['data']->id ) ) {
            return false;
        }
    }

    // if we're here, all items in the cart are in our category
    return true;
}

所以如果'兄弟'类别是购物车中的唯一商品,我希望停止结帐(带错误消息)。我有一个“标准”类别,必须在客户进入结账前进入购物篮。希望这是有道理的。

3 个答案:

答案 0 :(得分:2)

这里有一个解决方案可以解决这个问题。特别是有两个主要功能(最后一个)

  1. 第一个功能(N°3)在购物车页面上显示您的消息,当购物车中有商品但没有强制性产品类别时。还显示强制性产品存档页面上的消息(当客户从结帐时重定向时很有用,见下文)
  2. 第二个功能(N°4)在尝试结帐时将客户重定向到产品必需类别存档页面,并且他的购物车没有缺少强制性产品类别。
  3.   

    your_mandatory_category_slug() 函数中强制类别slug之前定义。

    这是代码:

    // Function that define the mandatory product category
     function your_mandatory_category_slug(){
    
         // DEFINE HERE the SLUG of the needed product category
        $category = 'clothing';
        return $category;
     }
    
    
    // Conditional function that returns true if the mandatory product category is in cart
    function has_mandatory_category(){
        $category_needed = your_mandatory_category_slug();
        $has_cat = false;
    
        // Iterrating each item in cart and detecting…
        foreach ( WC()->cart->get_cart() as $item ) {
    
            // Detects if the needed product category is in cart items
            if ( has_term($category_needed, 'product_cat', $item['product_id'] ) ) {
                $has_cat = true;
                break;
            }
        }
        return $has_cat;
     }
    
    
    // Function that display a message if there is not in cart a mandatory product category
    function mandatory_category_display_message() {
            $category_needed = your_mandatory_category_slug();
    
        // check that cart is not empty (for cart and product category archives)
        if( !WC()->cart->is_empty() && ( is_cart() || is_product_category( $category_needed ) ) ){
            $category_obj = get_term_by( 'slug', $category_needed, 'product_cat' );
            if ( is_wp_error( $category_obj ) ) return;
    
            // Display message when product category is not in cart items
            if ( !has_mandatory_category() ) {
                $category_name = $category_obj->name;
                $category_url = get_term_link( $category_needed, 'product_cat' );
    
                // render a notice to explain why checkout is blocked
                wc_add_notice( sprintf( __( '<strong>Reminder:</strong> You have to add in your cart, a product from "%1$s" category, to be allowed to check out. Please return <a href="%2$s"> here to "%1$s" product page</a>', 'your_theme_domain'), $category_name, $category_url ), 'error' );
            }
        }
    }
    add_action( 'woocommerce_before_main_content', 'mandatory_category_display_message', 30 ); // for product mandatory category archives pages
    add_action( 'woocommerce_check_cart_items', 'mandatory_category_display_message' ); // for cat page
    
    
    // Function that redirect from checkout to mandatory product category archives pages
    function mandatory_category_checkout_redirect() {
    
        // If cart is not empty on checkout page
        if( !WC()->cart->is_empty() && is_checkout() ){
            $category_needed = your_mandatory_category_slug();
    
            // If missing product category => redirect to the products category page
            if ( !has_mandatory_category() )
                wp_redirect( get_term_link( $category_needed, 'product_cat' ) );
        }
    }
    add_action('template_redirect', 'mandatory_category_checkout_redirect');
    

    这可以在您的活动子主题(或主题)的function.php文件中,也可以在任何插件文件中。

    此代码经过测试且功能齐全。

答案 1 :(得分:0)

使用Woocommerce v2.6.12,就像我的Wordpress安装的魅力一样。

我想添加两个强制性产品类别,将来可能会有3个或4个。我尝试过改变:

$category = 'slug1';

$category = 'slug1', 'slug2';

$category = array('slug1','slug2');

没有成功。有没有办法让这个代码适用于多个slugs?

答案 2 :(得分:0)

我已经调整了 LoicTheAztec 的答案以处理 2 个类别。它似乎正在工作。我没有修改文本 has_mandatory_categorytext 函数,.如果您可以按照代码进行操作,则可以自己动手做,但我只关注功能。还有另一个答案 here,但我更喜欢这个答案,而另一个不适合我。

// Function that define the 2 mandatory product categories cat1 & cat2
 function your_mandatory_category_slug(){ $category = 'cat1';    return $category; }
 function your_mandatory_category_slug2(){ $category = 'cat2';    return $category; }
// Conditional function that returns true if the mandatory product category is in cart
function has_mandatory_category1(){
    $category_needed = your_mandatory_category_slug();
    $has_cat = false;
    foreach ( WC()->cart->get_cart() as $item ) {
        if ( has_term($category_needed, 'product_cat', $item['product_id'] ) ) {
            $has_cat = true;
            break;
        }
    }
    return $has_cat;
 }
// Conditional function that returns true if the mandatory product category is in cart
function has_mandatory_category2(){
    $category_needed = your_mandatory_category_slug2();
    $has_cat = false;
    foreach ( WC()->cart->get_cart() as $item ) {
        if ( has_term($category_needed, 'product_cat', $item['product_id'] ) ) {
            $has_cat = true;
            break;
        }
    }
    return $has_cat;
 }





// Function that redirect from checkout to mandatory product category archives pages
function mandatory_category_checkout_redirect() {
    // If cart is not empty on checkout page
    if( !WC()->cart->is_empty() && is_checkout() ){
        $category_needed = your_mandatory_category_slug();
        $category_needed2 = your_mandatory_category_slug2();
        if ( !has_mandatory_category1() )
            wp_redirect( get_term_link( $category_needed, 'product_cat' ) );
        if ( !has_mandatory_category2() )
            wp_redirect( get_term_link( $category_needed2, 'product_cat' ) );
    }
}
add_action('template_redirect', 'mandatory_category_checkout_redirect');