我为 WordPress REST API 构建了一个自定义端点来获得后期修订。结果在 Wordpress Post 语法中：
[ID] => 478
[post_author] => 1
[post_date] => 2017-11-20 17:22:11
[post_date_gmt] => 2017-11-20 16:22:11
[post_content] => My Post content
而 Wordpress REST API 会为我提供如下内容：
"author": 1,
"title": {
"rendered": "My title"
},
"content": {
"rendered": "",
"protected": false
},
（一个是通过 php 打印的，另一个是 JSON 格式，但重要的是，在第一个示例中它说：post_content而在第二个示例中，content它是然后被分隔的rendered，protected例如。
我很确定这与此处描述的几乎相同： https ://wordpress.stackexchange.com/questions/236249/wp-api-v2-custom-endpoint-response-formatting?newreg=7edb54e1ae494e528e5e146982469664
但就我而言，我有修改。
我尝试为 REST API 准备 Post 对象。我创建了 WP_REST_Revisions_Controller 的新实例并尝试使用它的方法prepare_item_for_response。$request 是一个 WP_Rest_Request。（顺便说一句：为什么我之前必须new \WP_REST_Revisions_Controller用反斜杠写\）。
$latest_revision = wp_get_post_revisions( $id, $args ); //WP Post Object
$postController = new \WP_REST_Revisions_Controller('revision');
$response = $postController->prepare_item_for_response( $latest_revision, $request );
print_r($response);
问题是我收到通知：
<b>Notice</b>: Trying to get property of non-object in <b>/Users/USER/Documents/my-api/wp/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php</b> on line <b>350</b>
<b>Notice</b>: Trying to get property of non-object in <b>/Users/USER/Documents/my-api/wp/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php</b> on line <b>354</b>
<b>Notice</b>: Trying to get property of non-object in <b>/Users/USER/Documents/my-api/wp/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php</b> on line <b>354</b>
....
必须参考这些行： https ://developer.wordpress.org/reference/classes/wp_rest_revisions_controller/ （第 350 行及以下）。
在通知之后，我打印了$response，我得到了这个：
WP_REST_Response Object
(
[links:protected] => Array
(
)
[matched_route:protected] =>
[matched_handler:protected] =>
[data] => Array
(
[author] => 0
[date] =>
[date_gmt] =>
[id] =>
[modified] =>
[modified_gmt] =>
[parent] => 0
[slug] =>
[guid] => Array
(
[rendered] =>
[raw] =>
)
)
[headers] => Array
(
)
[status] => 200
)
.. 不知何故，数据丢失或出现其他问题。
这是整个 php 脚本，看看我在做什么：
<?php
/**
* Add a new API route for a post or pages preview
*/
class Preview_To_REST_API_Controller extends WP_REST_Controller {
//The namespace and version for the REST SERVER
var $namespace = 'previews/v';
var $version = '1';
public function register_routes() {
$namespace = $this->namespace . $this->version;
$base = 'preview';
register_rest_route( $namespace, '/' . $base, array(
array(
'methods' => WP_REST_Server::READABLE,
'callback' => array( $this, 'get_preview' ),
'permission_callback' => array( $this, 'get_permission' )
)
) );
}
// Register our REST Server
public function hook_rest_server(){
add_action( 'rest_api_init', array( $this, 'register_routes' ) );
}
public function get_permission(){
if ( ! current_user_can( 'edit_posts' ) ) {
return new WP_Error( 'rest_forbidden', esc_html__( 'You do not have permissions to view this data.', 'my-text-domain' ), array( 'status' => 401 ) );
}
// This approach blocks the endpoint operation. You could alternatively do this by an un-blocking approach, by returning false here and changing the permissions check.
return true;
}
public function get_preview( WP_REST_Request $request ){
// use the helper methods to get the parameters
$id = $request->get_param( 'id' );
// Only return the newest
$args = array (
'order' => 'DESC',
'orderby' => 'date',
'posts_per_page' => '1'
);
// Preview version is saved in the latest revision of the page/post
$latest_revision = wp_get_post_revisions( $id, $args );
print_r($latest_revision);
$postController = new \WP_REST_Revisions_Controller('revision');
$response = $postController->prepare_item_for_response( $latest_revision, $request );
print_r($response);
if ($latest_revision) {
// Use the current method to get the only element in the revisions array
// [0] does not return anything, because the Array's value is saved
// as the ID key: Array[$id], but this ID we need to find out first
$revision_id = current($latest_revision) -> ID;
$acf_fields = get_fields($revision_id);
if ( empty($latest_revision) ) {
return null;
}
// Add acf fields to latest revision
$latest_revision[$revision_id] -> acf = $acf_fields;
return $latest_revision;
} else {
return null;
}
}
}
$preview_controller = new Preview_To_REST_API_Controller();
$preview_controller->hook_rest_server();
我真的很高兴收到解决此问题的任何提示。干杯