为了满足我的需要，我定制了wp rest posts回调：

function get_all_posts( $data, $post, $context ) {
    return [
        \'id\'        => $data->data[\'id\'],
        \'date\'      => $data->data[\'date\'],
        \'date_gmt\'  => $data->data[\'date_gmt\'],
        \'modified\'  => $data->data[\'modified\'],
        \'title\'     => $data->data[\'title\'][\'rendered\'],
        \'content\'   => $data->data[\'content\'][\'rendered\'],
        \'excerpt\'   => $data->data[\'excerpt\'][\'rendered\'],
        \'category\'  => get_the_category_by_ID( $data->data[\'categories\'][0] ),
        \'link\'      => $data->data[\'link\'],


    ];
}
add_filter( \'rest_prepare_post\', \'get_all_posts\', 10, 3 );