我的首要问题是the_field('a_field_I_have_in_art_post')
返回空。
在调试post对象时,我没有看到任何高级自定义字段。
我认为高级自定义字段在发布对象(?)中显示为元键。
function art_init()
{
$arts_labels = array(
'name' => 'Arts',
'singular_name' => 'Art',
'menu_name' => 'Arts'
);
$args = array(
'labels' => $arts_labels,
'public' => true,
'show_ui' => true,
'capability_type' => 'post',
'hierarchical' => false,
'rewrite' => array('slug' => 'art'),
'query_var' => true,
'menu_icon' => 'dashicons-welcome-widgets-menus',
'supports' => array(
'title',
'editor',
'excerpt',
'trackbacks',
'custom-fields',
'comments',
'revisions',
'thumbnail',
'author',
'page-attributes',)
);
register_post_type('art', $args);
}
add_action('init', 'art_init');
$posts = get_posts([
'numberposts' => -1,
'post_type' => 'art',
]);
if ($posts) {
foreach ($posts as $postKey => $postValue) {
var_dump($postValue->meta_key);
$postAcfFields = get_fields($postValue);
//var_dump('$postAcfFields: '.count($postAcfFields));
if ($postAcfFields['item_images']) {
$postObjWithImages[$postValue->ID] = $postAcfFields;
}
}
}
object(WP_Post)[1600]
public 'ID' => int 1840
public 'post_author' => string '1' (length=1)
public 'post_date' => string '2018-10-13 10:53:45' (length=19)
public 'post_date_gmt' => string '2018-10-13 10:53:45' (length=19)
public 'post_content' => string '' (length=0)
public 'post_title' => string 'this is a contact' (length=17)
public 'post_excerpt' => string '' (length=0)
public 'post_status' => string 'publish' (length=7)
public 'comment_status' => string 'open' (length=4)
public 'ping_status' => string 'open' (length=4)
public 'post_password' => string '' (length=0)
public 'post_name' => string 'this-is-a-contact' (length=17)
public 'to_ping' => string '' (length=0)
public 'pinged' => string '' (length=0)
public 'post_modified' => string '2018-10-13 13:47:17' (length=19)
public 'post_modified_gmt' => string '2018-10-13 13:47:17' (length=19)
public 'post_content_filtered' => string '' (length=0)
public 'post_parent' => int 0
public 'guid' => string 'http://website.com/?post_type=art&p=1840' (length=61)
public 'menu_order' => int 0
public 'post_type' => string 'art' (length=3)
public 'post_mime_type' => string '' (length=0)
public 'comment_count' => string '0' (length=1)
public 'filter' => string 'raw' (length=3)
例如, the_field('item_title)
返回空,而发布对象循环中的get_fields()
显示了所有ACF字段的单独数组,与发布对象及其属性(链接,标题等)没有任何关系。
如我的片段所示,我创建了一个assoc数组来帮助解决此问题,但是这使我的所有查询都未经过优化,缓慢且很难与具有多个嵌套foreach()
的HTML结合使用,特别是对于图像我正在尝试使用基于post的多个内部项目在bootstrap滑块中实现这些图像。
我对使用get_field()
感兴趣,每个'post_type' => 'art'
都有很多图像。
答案 0 :(得分:1)
我认为问题是要了解ACF字段是什么:简单地,一个WordPress自定义字段(存储在wp_postmeta表中),而不是存储在wp_posts表中的标准WP_Post对象的一部分。
另一个可以用一些替代方法更深入地了解这个问题的答案是WordPress Stack Exchange中的这个答案:https://wordpress.stackexchange.com/questions/172041/can-wp-query-return-posts-meta-in-a-single-request
因此,在上面的foreach循环中,您可以使用ACF的get_field($ selector,$ post_id)来检索自定义字段,也可以使用get_post_meta($ post_id,$ key),但是您需要传递$ post_id。
$postAcfFields = get_fields($postValue);
//var_dump('$postAcfFields: '.count($postAcfFields));
if ($postAcfFields['item_images']) { // This will always return false since you're not specifying the $post_id above in get_fields($postValue)
$postObjWithImages[$postValue->ID] = $postAcfFields;
}