我正在尝试使我的块属性显示在REST API中。

首先，我添加了rest_api_init 钩子将我的区块列入白名单。

add_action(
    \'rest_api_init\',
    function () {

        if ( ! function_exists( \'use_block_editor_for_post_type\' ) ) {
            require ABSPATH . \'wp-admin/includes/post.php\';
        }

        // add Location Block to the WordPress REST API
        $post_types = get_post_types_by_support( [ \'editor\' ] );
        foreach ( $post_types as $post_type ) {
            if ( use_block_editor_for_post_type( $post_type ) ) {
                register_rest_field(
                    $post_type,
                    \'blocks\',
                    [
                        \'get_callback\' => function ( array $post ) {
                            $raw_blocks= parse_blocks( $post[\'content\'][\'raw\'] );
                            $whitelisted_blocks = [];
                            foreach ($raw_blocks as $raw_block) {
                                if( $raw_block[\'blockName\']==\'myplugin/block-map-location\' ){
                                    array_push($whitelisted_blocks, $raw_block);
                                }
                            }
                            return $whitelisted_blocks;
                        },
                    ]
                );
            }
        }
    }
);

这将输出我的原始块内容，但attrs 数组为空。

blocks: 
  0:
  blockName:    "myplugin/block-map-location"
  attrs:    []
  innerBlocks:; []
  innerHTML:    "\\n<div class=\\"wp-block-myplugin-block-map-location\\" aria-label=\\"Interactive Map\\" role=\\"region\\"><figure><div class=\\"map-pp\\" id=\\"placepress-map\\" data-lat=\\"41.50214445\\" data-lon=\\"-81.6751670486689\\" data-zoom=\\"13\\" data-basemap=\\"carto_voyager\\"></div><figcaption class=\\"map-caption-pp\\">This is the map caption.</figcaption></figure></div>\\n"
  innerContent: 
    0:  "\\n<div class=\\"wp-block-myplugin-block-map-location\\" aria-label=\\"Interactive Map\\" role=\\"region\\"><figure><div class=\\"map-pp\\" id=\\"placepress-map\\" data-lat=\\"41.50214445\\" data-lon=\\"-81.6751670486689\\" data-zoom=\\"13\\" data-basemap=\\"carto_voyager\\"></div><figcaption class=\\"map-caption-pp\\">This is the map caption.</figcaption></figure></div>\\n"

为了解决这个问题，我用古腾堡手册中的例子尝试了以下方法，但似乎没有任何效果。（请注意，在本例中，我正在使用自定义的“locations”帖子类型，并试图从我的块中获取“lat”和“lon”属性。）

add_action( \'init\', \'register_block_attributes\' );
function register_block_attributes() {
    register_meta( \'post\', \'lat\', array(
        \'object_subtype\' => \'locations\',
        \'show_in_rest\' => true,
    ) );
    register_meta( \'post\', \'lon\', array(
        \'object_subtype\' => \'locations\',
        \'show_in_rest\' => true,
    ) );
}

我显然遗漏了一些东西，但在文档中找不到任何答案。

attributes: {
  api_coordinates: {
    type: \'string\',
    source: \'meta\',
    meta: \'api_coordinates\',
  }, //...
}