Question

如何为get_terms函数解决WP_Error对象？我在tax_alone_event文件中注册了自定义分类法coustom-post-type.php。并包含在functions.php文件中。这是我的代码

function get__terms_list() {
  $terms = get_terms('tax_alone_event');
  return $terms ;

} //End get_terms_list()..

print_r(get__terms_list());

然后我在coustom-post-type.php文件中注册了自定义发布和自定义分类代码

function Alone_setup_post_type_project() {
    // event custom post and tax 
    $alone_event_args = array(
        'labels'             => array(
            'name'               => _x( 'Event', 'post type general name', 'alonefoundation' ),
             'add_new'            => _x( 'Add New', 'Event', 'alonefoundation' ),
             'add_new_item'       => __( 'Add New Event', 'alonefoundation' ),
             'new_item'           => __( 'New Event', 'alonefoundation' ),
             'edit_item'          => __( 'Edit Event', 'alonefoundation' ),
             'view_item'          => __( 'View Event', 'alonefoundation' ),
             'all_items'          => __( 'All Event', 'alonefoundation' ),
        ),
        'description'        => __( 'Description.', 'alonefoundation' ),
        'public'             => true,
        'publicly_queryable' => true,
        'show_ui'            => true,
        'show_in_menu'       => true,
        'query_var'          => true,
        'rewrite'            => array( 'slug' => 'event' ),
        'capability_type'    => 'post',
        'has_archive'        => true,
        'hierarchical'       => true,
        'taxonomies'            => array('tax_alone_event'),
        'menu_position'      => null,
        'supports'           => array( 'title', 'editor', 'thumbnail')
    );
    register_post_type( 'alone-event', $alone_event_args );
    $alone_event_tax = array(
        'label' => __( 'Category' ),
        'rewrite' => array( 'slug' => 'event_tax' ),
        'hierarchical' => true,
    ) ;
    register_taxonomy( 'tax_alone_event', array('alone-event'), $alone_event_tax );
}

add_action( 'init', 'Alone_setup_post_type_project');

Answer 1

{ columnDefs: [{ "targets": 2, "name": "winding temp", "render": function (data, type, row, meta) { var hexvalue =base64toHEX(data); var deviceid= hexToDec(hexvalue.substr(1,1)); var oil_temp= hexToDec(hexvalue.substr(2,2)); var winding_temp= hexToDec(hexvalue.substr(4,2)); return 'Winding Temp: ' + winding_temp ; } },{ "targets": 1, "name": "Oil temp", "render": function (data, type, row, meta) { var hexvalue =base64toHEX(data); var deviceid= hexToDec(hexvalue.substr(1,1)); var oil_temp= hexToDec(hexvalue.substr(2,2)); var winding_temp= hexToDec(hexvalue.substr(4,2)); return 'oil temp: ' + oil_temp ; } }, { "targets": 0, "name" : "Timestamp", "render": function (data, type, row, meta) { var updDate= UtcToIst(data).toLocaleDateString(); var updTime= UtcToIst(data).toLocaleTimeString(); var updDateTime=updDate + ", " + updTime; return updDateTime ; } } ], data: Readings, columns: [{ "data": "timestamp" }, { "data": "dataFrame" }, { "data": "dataFrame" } ]函数将仅显示默认的get_terms()，除非您将其挂接到init。

WordPress taxonomies

输出：

function get__terms_list() {
  $terms = get_terms('tax_alone_event',array(
    'hide_empty' => false
 ));
  print_r($terms);
} //End get_terms_list()..

//print_r(get__terms_list());

add_action('init','get__terms_list');

Answer 2

您应该通过4.5.0-https://developer.wordpress.org/reference/functions/get_terms/中$ args数组中的'taxonomy'参数传递分类法。

function get__terms_list() {
    $terms = get_terms( array( 'taxonomy' => 'tax_alone_event' ) );
    return $terms ;
}

print_r(get__terms_list());

Answer 3

您可以通过两种方式消除错误

不要使用init钩子，直接调用Alone_setup_post_type_project();
还使用get_terms函数和init钩子

因为您正在做的是在{word}向系统注册您的帖子类型和分类法之前无法使用get_terms函数。

Answer 4

我将您的代码复制给自己，效果很好。
您在哪个文件中有此部分？

function get__terms_list() {
  $terms = get_terms('tax_alone_event');
  return $terms ;

} //End get_terms_list()..

print_r(get__terms_list());

print_r(get__terms_list());应该位于page.php，footer.php等文件中。

在print_r(get_taxonomies());之前放置print_r(get__terms_list());，以查看您的分类法是否已注册。

get_terms WP_Error对象（[错误] =>数组（[无效分类法] =>数组（[0] =>无效分类法。））[错误数据] =>数组（））

4 个答案: