在 woocommerce 中，我有 2 個選擇字段：第一個是“汽車品牌”，第二個是這些的“汽車模型” Car Brands。我想做的是為所選的“汽車品牌”動態獲取“汽車型號”“汽車品牌”來自 WooCommerce 產品屬性分類法。對于每個“汽車品牌”，相關的“汽車型號”是該產品屬性分類法的術語。這是“汽車品牌”（第一個選擇字段）的代碼：$attributes = wc_get_attribute_taxonomies();if($attributes) { echo '<select id="car-brands"><option value="noselection">Car Brand</option>'; foreach ( $attributes as $attribute ) { echo '<option value="' . $attribute->attribute_name . '">' . $attribute->attribute_label . '</option>'; } echo '</select>';}以及生成的 html 示例代碼：<select id="car-brands"> <option value="noselection">Car Brand</option> <option value="toyota">TOYOTA</option> <option value="lexus">LEXUS</option></select>然后是“汽車模型”的代碼（第二個選擇字段）：$selected_attribute_name = 'toyota';$taxonomy = 'pa_' . $selected_attribute_name;$term_names = get_terms( array( 'taxonomy' => $taxonomy, 'fields' => 'names' ) );echo '<select id="car-models"><option value="noselection">Car Model</option>';echo '<option>' . implode( '</option><option>', $term_names ) . '</option>';echo '</select>';以及生成的 html 示例代碼：<select id="car-models"> <option value="noselection">Car Model</option> <option value="toyota">AVENSIS</option> <option value="lexus">CAMRY</option></select>如您所見，我正在獲取“toyota”品牌的特定車型，因為我已將“toyota”硬編碼為“Car brand”：$selected_attribute_name = 'toyota';所以我想要的是作為$selected_attribute_name一個動態變量，所以當用戶選擇汽車品牌“LEXUS”或“TOYOTA”時，第二個選擇字段會動態加載相關術語（選項）。我發現了很多相關的線程，但我無法理解如何讓它適用于我的案例。如何讓動態“汽車模型”根據所選汽車品牌選擇字段選項？
2 回答
慕田峪4524236
TA貢獻1875條經驗 獲得超5個贊
下面使用Ajax從選中的“汽車品牌” （產品屬性分類法）中獲取對應的terms ，動態生成“car model”選擇字段選項（選中的產品屬性分類法的terms）：
// Display 2 select fields (car brands and car models)
add_action( 'woocommerce_before_shop_loop', 'before_shop_loop_action_callback', 3 );
function before_shop_loop_action_callback() {
if( $attributes = wc_get_attribute_taxonomies() ) {
## 1st dropdown
echo '<select id="car-brands" style="min-width:100px;"><option value="">' . __("Car Brand"). '</option>';
// Loop through attribute taxonomies
foreach ( $attributes as $attribute ) {
echo '<option value="' . $attribute->attribute_name . '">' . $attribute->attribute_label . '</option>';
}
echo '</select>';
## 2nd dropdown
echo '<select id="car-models" style="min-width:100px;"><option value=""> … </option></select>';
}
}
// jQuery / Ajax (client side)
add_action( 'wp_footer', 'car_brand_selectors_script' );
function car_brand_selectors_script() {
?>
<script type="text/javascript">
jQuery(function( $ ) {
if (typeof woocommerce_params === 'undefined')
return false;
var b = 'select#car-brands', // 1st field
m = 'select#car-models', // 2nd field
r = $(m).html(); // Original 2nd field select options
function ajaxSendCarBrand( carBrand ) {
$.ajax({
url: woocommerce_params.ajax_url,
type : 'POST',
data : {
'action' : 'get_brand_terms',
'car_brand' : carBrand
},
success: function( response ) {
var options = $.parseJSON(response),
opt = '';
if ( $.isEmptyObject(options) ) {
$(m).html(r);
} else {
$.each( options, function( key, value ){
opt += '<option value="'+key+'">'+value+'</option>';
});
$(m).html(opt);
}
}
});
}
// On change live event
$( document.body ).on( 'change', b, function() {
ajaxSendCarBrand($(this).val());
});
});
</script>
<?php
}
// WP AJAX HANDLER (Server side)
add_action('wp_ajax_get_brand_terms', 'get_car_brand_models');
add_action('wp_ajax_nopriv_get_brand_terms','get_car_brand_models');
function get_car_brand_models() {
if( isset($_POST['car_brand']) ) {
$brand = wc_clean( $_POST['car_brand'] );
$taxonomy = wc_attribute_taxonomy_name($brand);
$options = [];
if( taxonomy_exists( $taxonomy ) ) {
$terms = get_terms( array( 'taxonomy' => $taxonomy ) );
foreach( $terms as $term ){
$options[$term->slug] = $term->name;
}
}
echo json_encode( $options );
}
wp_die();
}
代碼進入您的活動子主題（或活動主題）的 functions.php 文件。測試和工作。
瀟瀟雨雨
TA貢獻1833條經驗 獲得超4個贊
在這里看一個有效的 ajax 示例。
Javascript 部分：
jQuery('#car-brands').change(function() {
let carBrandName = jQuery(this).val();
YourFunctionNameHere(carBrandName);
});
//function to execute
function YourFunctionNameHere(carBrandName) {
//formdata variable consists of
//action: this is ajax action name for WordPress which we define in PHP with a callback function with same name. See in PHP code part.
//brandName: this is your custom post attributes name
let formdata = "action=get_car_models&brandName="+carBrandName;
jQuery.ajax({
type: "POST",
url: ajaxurl, // since WordPress version 2.8 ajaxurl is always defined in the admin header and points to admin-ajax.php
data: formdata,
cache: false,
success: function(response, textStatus, jqXHR) {
jQuery("#car-models").html(response);
},
error: function(jqXHR, textStatus, errorThrown) {
//do stuff here in case of error
}
});
}
PHP部分：
//here wp_ajax is the required prefix for your custom actions
//first parameter is action name with wp_ajax prefix
//second parameter is callback function to execute with same name as your action
//for example if your action name is wp_ajax_get_car_models then your callback will be get_car_models
add_action( 'wp_ajax_get_car_models', 'get_car_models' );
function get_car_models() {
global $wpdb; // this is how you get access to the database
//require_once any files here in which the below code is available or just write your code here.
$selected_attribute_name = $_POST['brandName'];
$taxonomy = 'pa_' . $selected_attribute_name;
$term_names = get_terms( array( 'taxonomy' => $taxonomy, 'fields' => 'names' ) );
$html = '';
$html .= '<select id="car-models"><option value="noselection">Car Model</option>';
$html .= '<option>' . implode( '</option><option>', $term_names ) . '</option>';
$html .= '</select>';
echo $html;
wp_die(); // this is required to terminate immediately and return a proper response
}
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